{
  "response": {
    "Key": "LON-IAD",
    "orig": {
      "code": "LON",
      "type": "airport",
      "city": "London",
      "fullCity": "London, England",
      "airport": "Heathrow Airport"
    },
    "dest": {
      "code": "IAD",
      "type": "airport",
      "city": "Washington",
      "fullCity": "Washington, United States",
      "airport": "Washington Intl Airport"
    },
    "faq": {
      "q0": {
        "question": "What is the typical flight duration from London to Washington?",
        "answer": "The flight from London to Washington is about 3,670 miles and typically takes 8 hours 25 minutes nonstop. The return flight is shorter at around 7 hours 25 minutes, with prevailing winds accounting for the roughly one-hour difference.",
        "methodology": "Flight times and distances come from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). The typical flight time is the median scheduled block time across all carriers on the route, computed the same way in both directions so the difference reflects prevailing winds rather than any change in method. Distance is the great-circle distance between the two airports, so the actual flown track is typically 2-5% longer.",
        "toolsUsed": [
          "flight_schedule"
        ]
      },
      "q1": {
        "question": "Are there any direct flights from London to Washington?",
        "answer": "Yes, British Airways, United, and Virgin Atlantic all fly nonstop from London Heathrow to Washington Dulles, with daily service on each carrier. Together they operate about 80 weekly flights — BA runs 38, United 28, and Virgin Atlantic 14, all departing daily. The flight takes roughly 8 hours and 25 minutes eastbound.",
        "methodology": "Airlines and weekly frequencies are compiled from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a median fare is shown for a carrier, it reflects the real fares Priceline users found on this route in the last 72 hours. Carrier service, flight times and distances for this route come from our flight-schedule database, which draws on published airline timetables, U.S. government schedule data, and observed operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We report the days of the week and the departure times each carrier operates. The typical flight time is the median scheduled block time, given both per carrier and across all carriers on the route; where a schedule does not publish an elapsed time, it is derived from the scheduled departure and arrival times converted to UTC. Outbound and return times are computed by the same method, so the difference between them is directly comparable and reflects prevailing winds rather than any change in derivation. Distance is the great-circle distance between the two specific airports named, so an actual flown track is typically 2-5% longer. Where shown, on-time departure and arrival rates and cancellation rates come from the U.S. Bureau of Transportation Statistics (BTS) Airline On-Time Performance dataset, which covers U.S. domestic routes only; where a typical fare is shown, it comes from the U.S. DOT Airline Origin and Destination Survey (DB1B), a quarterly 10% sample of tickets sold.",
        "toolsUsed": [
          "route_airlines",
          "flight_schedule"
        ]
      },
      "q2": {
        "question": "Are there visa requirements to travel from London to Washington?",
        "answer": "For British citizens traveling from London to Washington, a visa is not required for short tourist visits of up to 90 days. However, an ESTA electronic travel authorization must be obtained before travel.\n\nThis is general guidance to help you plan, not official immigration advice — entry rules can change and can depend on your nationality and circumstances, so please confirm the current requirements with the relevant embassy or official government source before you travel.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://en.wikipedia.org/wiki/Visa_policy_of_the_United_States",
            "title": "Visa policy of the United States",
            "favicon": "https://en.wikipedia.org/static/favicon/wikipedia.ico"
          },
          {
            "url": "https://www.gov.uk/foreign-travel-advice/usa/entry-requirements",
            "title": "United States entry requirements — GOV.UK",
            "favicon": "https://www.gov.uk/favicon.ico"
          },
          {
            "url": "https://uscis.gov/working-in-the-united-states/temporary-visitors-for-business/wb-temporary-business-visitor-under-visa-waiver-program",
            "title": "WB Temporary Business Visitor under Visa Waiver Program | USCIS"
          },
          {
            "url": "https://uscis.gov/working-in-the-united-states/temporary-visitors-for-business",
            "title": "Temporary Visitors for Business | USCIS"
          },
          {
            "url": "https://www.cbp.gov/travel/international-visitors/visa-waiver-program/requirements-immigrant-and-nonimmigrant-visas",
            "title": "Requirements for Immigrant and Nonimmigrant Visas | U.S. Customs and Border Protection"
          },
          {
            "url": "https://www.cbp.gov/travel/international-visitors/applying-admission-united-states",
            "title": "Admission into United States | U.S. Customs and Border Protection"
          },
          {
            "url": "https://esta.cbp.dhs.gov/",
            "title": "Official ESTA Application Website - Home"
          }
        ],
        "preopenedReferences": true,
        "stageOnly": true
      },
      "q3": {
        "question": "What are the ground transportation options in Washington?",
        "answer": "From Washington Dulles International Airport, the most-used and fastest option to reach the city center is the Metrorail Silver Line, which connects directly to the main terminal via an indoor pedestrian tunnel with moving sidewalks and serves downtown Washington, D.C. Taxis, ride-share services like Uber and Lyft, and rental cars are also available, with taxis and ride-shares offering door-to-door convenience but subject to traffic, and car rentals best for exploring beyond the city. The Silver Line is the most used for its reliability and direct access, though it takes about 50-60 minutes to reach downtown. For those prioritizing speed during off-peak hours, a taxi or ride-share can be faster, but the metro is generally the recommended and most cost-effective choice.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://www.flydulles.com/parking-transportation",
            "title": "flydulles.com - Parking & Transportation",
            "favicon": "https://www.flydulles.com/themes/custom/mwaa_barrio/favicon.ico"
          },
          {
            "url": "https://www.flydulles.com/metro",
            "title": "flydulles.com - Dulles Airport Metrorail Station",
            "favicon": "https://www.flydulles.com/themes/custom/mwaa_barrio/favicon.ico"
          },
          {
            "url": "https://www.flydulles.com/",
            "title": "Official Website of Washington Dulles International Airport - IAD",
            "favicon": "https://www.flydulles.com/themes/custom/mwaa_barrio/favicon.ico"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Dulles_International_Airport",
            "title": "Dulles International Airport",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-09-18T13:47:09Z"
          },
          {
            "url": "https://flydulles.com/shopping-dining",
            "title": "flydulles.com - Shopping & Dining",
            "favicon": "https://flydulles.com/themes/custom/mwaa_barrio/favicon.ico"
          }
        ]
      },
      "q4": {
        "question": "When is the cheapest time to fly from London to Washington?",
        "answer": "Average fares on the London to Washington route bottom out around $323 in late September, with September ($333) and October ($338) the cheapest months overall and February ($356) close behind. The most expensive time to fly is late December, when averages climb to about $450, making December the priciest month at $425 on average, followed by July at $412.",
        "methodology": "Seasonal fares come from Priceline's own air booking-summary archive, analysed in-house and refreshed monthly. For each day of the year we take a representative round-trip fare, a blend of the 25th-percentile and average ticket price over the route's bookings, and smooth the series into a seasonal curve; the half-month low and high and the monthly figures quoted here are averages of that curve. Thin and international routes borrow their seasonal shape from the nearest busy routes, with the price level anchored to the route's own bookings.",
        "toolsUsed": [
          "seasonal_prices"
        ]
      },
      "q5": {
        "question": "How far in advance should I book tickets from London to Washington?",
        "answer": "For London to Washington, the best fares appear when booking roughly 4-6 weeks ahead, with prices bottoming out around $338-339 at 30-35 days before departure. Booking much earlier (5+ months out) is notably pricier, around $470-474. For summer or holiday travel, you'd generally want to book further in advance than the standard window since demand spikes push prices up.",
        "methodology": "Booking-window guidance comes from the same monthly in-house analysis of Priceline's own air booking-summary archive. We aggregate the route's bookings by how many days before departure they were made, from about 180 days out to the day of travel, smooth the curve, and highlight the stretch of lead times with the lowest average fare. Thin and international routes borrow the curve shape from the nearest busy routes, anchored to the route's own price level. It reflects current fares and is refreshed monthly.",
        "toolsUsed": [
          "booking_timing"
        ]
      },
      "q6": {
        "question": "Are overnight (red‑eye) flights available from London to Washington?",
        "answer": "No overnight (red-eye) flights are currently scheduled from London to Washington Dulles — neither nonstop nor connecting itineraries with a red-eye long leg were found.",
        "methodology": "Red-eye flights are identified from scheduled local departure and arrival times in our flight-schedule database — built from published airline timetables and official schedule data, including U.S. Department of Transportation records for domestic routes — flagging services that depart late at night and arrive the following morning; for connecting itineraries the red-eye is based on the timing of the overnight long-haul leg.",
        "toolsUsed": [
          "redeye_flights"
        ]
      },
      "q7": {
        "question": "Which airlines usually operate this route from London to Washington?",
        "answer": "British Airways, United, and Virgin Atlantic all fly nonstop from London Heathrow to Washington Dulles. British Airways offers the most service with 38 weekly flights and a median fare around $668, United operates 28 weekly flights at about $624, and Virgin Atlantic has 14 weekly flights with a median fare near $675.",
        "methodology": "Airlines and weekly frequencies come from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a typical fare is shown for a carrier, it is the median of the real fares Priceline users found on this route in the last 72 hours.",
        "toolsUsed": [
          "route_airlines"
        ]
      },
      "q8": {
        "question": "If I need a connection, what are common layover cities between London and Washington?",
        "answer": "Common layovers include Dublin, Reykjavik, Amsterdam and Paris, offering competitive total travel times. Dublin and Reykjavik provide US preclearance, saving time on arrival. Amsterdam and Paris have extensive networks and efficient single-terminal transfers."
      },
      "q10": {
        "question": "Which months have the best weather for traveling to Washington?",
        "answer": "April to May and September to October offer pleasant temperatures, cherry blossoms or fall foliage, and fewer tourists than summer."
      },
      "q11": {
        "question": "What documents should I bring with me to the airport when flying from London to Washington?",
        "answer": "Bring a passport valid for the duration of your stay, an approved ESTA or U.S. visa, proof of onward or return travel, and a payment method for baggage. Check if any vaccination certificates are currently required for entry."
      },
      "q12": {
        "question": "Which airport should I use in Washington?",
        "answer": "Washington Dulles is the primary international gateway, located 26 miles from downtown, and is a hub for United Airlines. Reagan National is just across the Potomac from central DC, serves mainly domestic routes, and is convenient for business and sightseeing. Baltimore/Washington International is farther north, offers a mix of domestic and some international flights, and is a major Southwest base."
      },
      "q13": {
        "question": "How do I get to Heathrow Airport from the city center?",
        "answer": "From central London to Heathrow, the Heathrow Express train is the fastest option, reaching Paddington in just 15 minutes. The London Underground (Piccadilly line) is the most popular and cheapest, taking under an hour and costing from about £5.50, while the Elizabeth line offers a mid-priced alternative at around £13.90. Coaches run to Victoria and other destinations from about £10, and taxis, ride-share, or driving take at least an hour, with driving subject to congestion and ULEZ charges.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://www.heathrow.com/transport-and-directions/getting-to-central-london",
            "title": "Getting to Central London | Heathrow",
            "favicon": "https://www.heathrow.com/etc.clientlibs/heathrow/clientlibs/vanilla-components/base/resources/favicon-57x57.png"
          },
          {
            "url": "https://www.heathrow.com/transport-and-directions",
            "title": "Transport and directions | Heathrow",
            "favicon": "https://www.heathrow.com/etc.clientlibs/heathrow/clientlibs/vanilla-components/base/resources/favicon-57x57.png"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Heathrow_Central_bus_station",
            "title": "Heathrow Central bus station",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-08-24T02:58:47Z"
          },
          {
            "url": "https://heathrow.com/de/transport-and-directions/getting-to-central-london",
            "title": "Anreise in die Londoner Innenstadt (Central London) | Heathrow",
            "favicon": "https://www.heathrow.com/etc.clientlibs/heathrow/clientlibs/vanilla-components/base/resources/favicon-57x57.png"
          },
          {
            "url": "https://www.heathrow.com/fr/transport-and-directions/getting-to-central-london",
            "title": "Se rendre au centre de Londres | Heathrow",
            "favicon": "https://www.heathrow.com/etc.clientlibs/heathrow/clientlibs/vanilla-components/base/resources/favicon-57x57.png"
          }
        ]
      },
      "q14": {
        "question": "Are there hotels or sleeping facilities at Washington airport?",
        "answer": "Washington Dulles Airport has a hotel inside the terminal, the Washington Dulles Airport Marriott, which is the nearest hotel on-site. Several other hotels are nearby and offer free shuttle service, including the Hyatt Regency Dulles International and the Courtyard by Marriott Dulles Airport Herndon. Day rooms are available, but there are no sleep cabins or pods.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://www.sleepinginairports.net/guides/washington-dulles-airport-guide.htm",
            "title": "Washington Dulles Airport Guide (IAD) - Sleeping in Airports",
            "favicon": "https://www.sleepinginairports.net/nitropack_static/oBWrHkPujHTPIaVWqdDSDhClXUyrYhhb/assets/images/optimized/rev-b853180/www.sleepinginairports.net/wp-content/uploads/2018/09/cropped-sia-logo-180x180.png",
            "time_published": "2018-08-08T21:11:21Z"
          },
          {
            "url": "https://ihg.com/holidayinn/hotels/gb/en/dulles/wasda/hoteldetail/amenities",
            "title": "Holiday Inn Washington-Dulles Intl Airport - Free Internet & More",
            "favicon": "https://digital.ihg.com/is/image/ihg/app-web-chiclet-holidayinn?fmt=png-alpha"
          },
          {
            "url": "https://www.flydulles.com/",
            "title": "Official Website of Washington Dulles International Airport - IAD",
            "favicon": "https://www.flydulles.com/themes/custom/mwaa_barrio/favicon.ico"
          },
          {
            "url": "https://ihg.com/washington-district-of-columbia/hotels-near-washington-dulles-international",
            "title": "47 Hotels Near IAD Washington Dulles International (IAD) Airport | IHG",
            "favicon": "https://digital.ihg.com/is/image/ihg/app-web-chiclet-ihg?fmt=png-alpha"
          }
        ]
      },
      "q15": {
        "question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at Dulles Intl Airport?",
        "answer": "Washington Dulles International Airport offers free Wi‑Fi throughout the terminal, keeping you connected before your flight from London. Currency exchange counters are available in multiple locations, including post‑security Concourses A, B, C, and D, as well as the pre‑security ticketing and baggage claim levels. Prayer rooms and chapels are not part of the airport's public amenities.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://flydulles.com/shopping-dining-advanced-directory",
            "title": "Shopping & Dining Advanced Directory | flydulles.com",
            "favicon": "https://flydulles.com/themes/custom/mwaa_barrio/favicon.ico"
          },
          {
            "url": "https://www.flydulles.com/",
            "title": "Official Website of Washington Dulles International Airport - IAD",
            "favicon": "https://www.flydulles.com/themes/custom/mwaa_barrio/favicon.ico"
          },
          {
            "url": "https://flydulles.com/travel-information/services-amenities/airport-lounges/capital-one-lounge-iad",
            "title": "Capital One Lounge - IAD | flydulles.com",
            "favicon": "https://flydulles.com/themes/custom/mwaa_barrio/favicon.ico"
          },
          {
            "url": "https://www.mwaa.com/iad-rfi",
            "title": "mwaa.com - US DOT Request for Information to Revitalize Washington Dulles International Airport",
            "favicon": "https://www.mwaa.com/themes/custom/mwaa_barrio/favicon.ico"
          },
          {
            "url": "https://flydulles.com/shopping-dining",
            "title": "flydulles.com - Shopping & Dining",
            "favicon": "https://flydulles.com/themes/custom/mwaa_barrio/favicon.ico"
          }
        ]
      },
      "q16": {
        "question": "Are there accessible services or children's facilities at the London and Washington airports?",
        "answer": "At London Heathrow, travelers with disabilities or reduced mobility can request assistance through their airline, travel agent, or tour operator at least 48 hours before departure; this includes help with check-in, security, and boarding, plus free sunflower lanyards for hidden disabilities and accessible facilities throughout the terminal. Washington Dulles offers wheelchair assistance arranged through your airline at the airport, accessible shuttle buses and taxis, and the Hidden Disabilities Sunflower Program with lanyards available at the USO Lounge and information desks. Neither airport's published accessibility information mentions dedicated children's play areas, though both provide family-friendly quiet spaces and assistance for young travelers.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://www.heathrow.com/at-the-airport/assistance-and-accessibility",
            "title": "Assistance and accessibility | Heathrow",
            "favicon": "https://www.heathrow.com/etc.clientlibs/heathrow/clientlibs/vanilla-components/base/resources/favicon-57x57.png"
          },
          {
            "url": "https://www.heathrow.com/at-the-airport/assistance-and-accessibility/help-in-the-terminal",
            "title": "Help in the terminal | Heathrow",
            "favicon": "https://www.heathrow.com/etc.clientlibs/heathrow/clientlibs/vanilla-components/base/resources/favicon-57x57.png"
          },
          {
            "url": "https://www.heathrow.com/at-the-airport/assistance-and-accessibility/request-assistance-before-leaving-home",
            "title": "Request assistance before leaving home | Heathrow",
            "favicon": "https://www.heathrow.com/etc.clientlibs/heathrow/clientlibs/vanilla-components/base/resources/favicon-57x57.png"
          },
          {
            "url": "https://www.heathrow.com/at-the-airport/assistance-and-accessibility/assistance-departure-guide",
            "title": "Assistance departure guide | Heathrow",
            "favicon": "https://www.heathrow.com/etc.clientlibs/heathrow/clientlibs/vanilla-components/base/resources/favicon-57x57.png"
          },
          {
            "url": "https://www.flydulles.com/iad/disability-services",
            "title": "flydulles.com - Disability Services",
            "favicon": "https://www.flydulles.com/themes/custom/mwaa_barrio/favicon.ico"
          },
          {
            "url": "https://www.flydulles.com/",
            "title": "Official Website of Washington Dulles International Airport - IAD",
            "favicon": "https://www.flydulles.com/themes/custom/mwaa_barrio/favicon.ico"
          },
          {
            "url": "https://www.mwaa.com/",
            "title": "Official Website of Metropolitan Washington Airports Authority - MWAA",
            "favicon": "https://www.mwaa.com/themes/custom/mwaa_barrio/favicon.ico",
            "time_published": "2026-08-26T00:00:00Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Dulles_International_Airport",
            "title": "Dulles International Airport",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-09-18T13:47:09Z"
          },
          {
            "url": "https://www.mwaa.com/policefireems/fire-ems/fire-ems-washington-dulles-international-airport",
            "title": "mwaa.com - Fire & EMS at Washington Dulles International Airport",
            "favicon": "https://www.mwaa.com/themes/custom/mwaa_barrio/favicon.ico"
          }
        ]
      },
      "q17": {
        "question": "What aircraft are typically used on flights from London to Washington?",
        "answer": "On the London to Washington route, United operates the most flights, using Boeing 777 family aircraft and Boeing 767-400s. British Airways also flies the route with Boeing 777 family aircraft. Virgin Atlantic serves the route as well.",
        "methodology": "Aircraft types come from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). For U.S. routes the type is grounded in the tail number that actually operated the flight; elsewhere it comes from the airline's filed equipment code. Where the source does not commit to a specific variant we name the aircraft family (for example Airbus A320 family) rather than guess, and where no reliable type is on file the aircraft is omitted rather than estimated. Types describe typical scheduled equipment and can vary with seasonal or day-of-week assignments and last-minute swaps.",
        "toolsUsed": [
          "flight_schedule"
        ]
      },
      "q18": {
        "question": "Which airline alliances serve flights from London to Washington?",
        "answer": "British Airways (oneworld), United Airlines (Star Alliance), and Virgin Atlantic serve London–Washington nonstop; Virgin Atlantic is not part of any global alliance.",
        "methodology": "Airlines and weekly frequencies are compiled from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a median fare is shown for a carrier, it reflects the real fares Priceline users found on this route in the last 72 hours.",
        "toolsUsed": [
          "route_airlines",
          "article_lookup"
        ]
      },
      "q20": {
        "question": "What are the best airport lounge options when departing from London?",
        "answer": "At London Heathrow, the best airport lounge options when departing include the No1 Lounge in Terminal 2, the Plaza Premium Lounge in Terminal 2, the Centurion Lounge in Terminal 3, the Blush Lounge by Plaza Premium Group in Terminal 4, and the Club Aspire Lounge in Terminal 5. Several of these lounges offer pre-booking; the Club Aspire Lounge in Terminal 5 and the No1 Lounge in Terminal 2 are among the highest-rated. Eligibility and entry policies vary, so check with the lounge or your airline before departure.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://my.prioritypass.com/en-GB/lounges/united-kingdom/heathrow",
            "title": "Heathrow Airport LHR Lounges - LHR Airport Guide and lounges. | Priority Pass",
            "favicon": "https://my.prioritypass.com/icon.png?a4ff481221414a5c",
            "time_published": "2024-11-05T16:20:09Z"
          },
          {
            "url": "https://prioritypass.com/en-GB/lounges/united-kingdom/heathrow",
            "title": "Heathrow Airport LHR Lounges - LHR Airport Guide and lounges. | Priority Pass",
            "time_published": "2024-11-05T00:00:00Z"
          },
          {
            "url": "https://heathrow.com/at-the-airport/terminal-guides",
            "title": "Terminal guides | Heathrow",
            "favicon": "https://www.heathrow.com/etc.clientlibs/heathrow/clientlibs/vanilla-components/base/resources/favicon-57x57.png"
          },
          {
            "url": "https://americanexpress.com/en-us/travel/lounges/the-platinum-card/LHR",
            "title": "American Express Lounges at London Heathrow Airport | Amex US",
            "favicon": "https://www.americanexpress.com/apple-touch-icon-152x152.png"
          },
          {
            "url": "https://www.delta.com/us/en/airports/europe/london-sky-club-airport-map",
            "title": "London Heathrow (LHR) Airport Map & Lounges | Delta Air Lines",
            "favicon": "https://www.delta.com/content/dam/delta-applications/dlhome/favicon.ico"
          }
        ]
      },
      "q21": {
        "question": "What is the baggage allowance on this route from London to Washington?",
        "answer": "Baggage allowance on London to Washington flights varies by airline and fare type. Basic economy often excludes checked bags, while standard international economy typically includes one checked bag and a carry-on. Premium cabins provide more generous allowances."
      },
      "q22": {
        "question": "What cabin and seat options are typical from London to Washington?",
        "answer": "On London to Washington flights, you can typically book Economy, Premium Economy, and flat-bed Business class; First class is available on select airlines."
      },
      "q23": {
        "question": "Are same‑day changes or standby possible on this route?",
        "answer": "Policies differ by airline and fare; flexible and premium tickets usually allow same‑day changes or standby, while Basic Economy generally does not."
      }
    }
  }
}