{
  "response": {
    "Key": "LIS-WAS",
    "orig": {
      "code": "LIS",
      "type": "airport",
      "city": "Lisbon",
      "fullCity": "Lisbon, Portugal",
      "airport": "Humberto Delgado Airport"
    },
    "dest": {
      "code": "WAS",
      "type": "airport",
      "city": "Washington",
      "fullCity": "Washington, United States",
      "airport": "Ronald Reagan National Airport"
    },
    "faq": {
      "q0": {
        "question": "What is the typical flight duration from Lisbon to Washington?",
        "answer": "A nonstop flight from Lisbon (LIS) to Washington Dulles (IAD) takes roughly 8 hours 15–30 minutes eastbound. The return flight from Washington to Lisbon is typically slightly shorter, around 7 hours 45 minutes, due to prevailing winds. With one stop, total travel time usually ranges from 11 to 14 hours, depending on the layover."
      },
      "q1": {
        "question": "Are there any direct flights from Lisbon to Washington?",
        "answer": "Yes, TAP Air Portugal and United both fly nonstop from Lisbon to Washington Dulles (IAD). TAP runs up to 22 weekly flights with multiple daily departures, and United adds another 14 weekly flights — all operate daily, so nonstop service is available every day of the week.",
        "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 and weekly frequencies are summarized 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). Where available, on-time and cancellation rates come from the U.S. Bureau of Transportation Statistics (BTS) Airline On-Time Performance dataset, and typical fares 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 Lisbon to Washington?",
        "answer": "Yes — visa requirements depend on your citizenship. If you are a Portuguese citizen, you can travel to Washington under the U.S. Visa Waiver Program for stays up to 90 days, but you must obtain an approved ESTA authorization before departure. If you are a U.S. citizen, you can enter Portugal and the Schengen Area visa‑free for up to 90 days within any 180‑day period. Travelers of other nationalities should check both U.S. and Schengen visa requirements."
      },
      "q4": {
        "question": "When is the cheapest time to fly from Lisbon to Washington?",
        "answer": "The cheapest months to fly from Lisbon to Washington are October, November, and September, with average fares around $727 to $772. The most expensive months are June, July, and May, where average prices range from $1,113 to $1,279.",
        "methodology": "This 'good deal' estimate shows a representative best price for each departure date across roughly a 12-month window (about 3 months back and 9 months forward). It is built from real flight prices found by Priceline users searching this route, accumulated into a price history for each departure date. Rather than weighting all of that history equally, we apply exponential time decay so recent prices dominate — a price seen yesterday counts almost in full, one from about a month ago roughly a third, and prices from a few months back very little — giving a figure that tracks today's market instead of a stale long-run average. Clear price outliers are removed before any calculation, departure dates with no observations are filled in from nearby dates, and the resulting curve is lightly smoothed so it reads as a clean seasonal trend rather than day-to-day noise. For this route, fares for the requested travel direction were unavailable, so the pattern shown is derived from the reverse direction, which shares the same seasonal demand cycle.",
        "toolsUsed": [
          "seasonal_prices"
        ]
      },
      "q5": {
        "question": "How far in advance should I book tickets from Lisbon to Washington?",
        "answer": "For flights from Lisbon to Washington, the best fares are typically found when booking 11 to 14 weeks ahead, with an average price around $1,049 during that window. The absolute lowest fares appear about 90 days before departure at roughly $1,039, while last-minute bookings can cost over $1,600. During summer and holiday periods, demand pushes prices higher, so booking even earlier within that 3-4 month range is advisable.",
        "methodology": "This booking-window guidance is built from the same real flight prices found by Priceline users searching this route, re-grouped by how many days before departure each price was seen (from the departure day out to about 180 days ahead) across the route's price history. At each booking lead time we report the 25th-percentile price — the cheaper end of what travelers were quoted, rather than the rock-bottom minimum (which can be a fluke) or the average (which is pulled up by expensive last-minute fares). The buy-or-wait advice then applies a risk premium that grows as departure approaches, since seat availability shrinks and prices become less predictable; using that adjusted curve we flag windows where waiting is likely to save a meaningful amount (at least $20 or 5%) versus windows where booking now is the better call. Isolated single-day recommendations are filtered out, so the advice only reflects a window that holds for several days in a row. For this route, fares for the requested travel direction were unavailable, so the pattern shown is derived from the reverse direction, which shares the same seasonal demand cycle.",
        "toolsUsed": [
          "booking_timing"
        ]
      },
      "q6": {
        "question": "Are overnight (red‑eye) flights available from Lisbon to Washington?",
        "answer": "No overnight (red-eye) flights are scheduled from Lisbon to Washington — neither nonstop nor connecting itineraries with a red-eye long leg operate on this route.",
        "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 Lisbon to Washington?",
        "answer": "TAP Air Portugal and United Airlines fly nonstop from Lisbon to Washington Dulles, with TAP operating up to 22 weekly flights and United up to 14. Both carriers offer daily service, with TAP departing at various times throughout the day and United typically in the late morning to early afternoon.",
        "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"
        ]
      },
      "q8": {
        "question": "If I need a connection, what are common layover cities between Lisbon and Washington?",
        "answer": "Common layover cities between Lisbon and Washington include London, Dublin, Madrid and Paris. London and Madrid offer extensive onward connections; Dublin provides US pre-clearance, saving time upon arrival; Paris has efficient transfer facilities. These hubs keep total travel time competitive."
      },
      "q9": {
        "question": "How reliable are on‑time departures on this route from Lisbon to Washington?",
        "answer": "On-time performance is generally good, but afternoon thunderstorms in Washington can cause delays. Morning departures on TAP Air Portugal or United tend to be more punctual."
      },
      "q10": {
        "question": "Which months have the best weather for traveling to Washington?",
        "answer": "April to May and September to October offer pleasant temperatures and fewer tourists compared to summer."
      },
      "q11": {
        "question": "What documents should I bring with me to the airport when flying from Lisbon to Washington?",
        "answer": "Bring a passport valid for the duration of your stay, an approved ESTA or U.S. visa, and proof of onward or return travel. Have a payment method for baggage and check for any vaccination certificate requirements."
      },
      "q12": {
        "question": "Which airport should I use in Washington?",
        "answer": "Washington has three airports. Reagan National is closest to downtown and the National Mall, ideal for domestic business and short-haul flights. Dulles is farther west, serves most international and long-haul routes, and is a United hub. Baltimore/Washington is north of the city, often used by Southwest and low-cost carriers for domestic leisure travel."
      },
      "q13": {
        "question": "How do I get to Humberto Delgado Airport from the city center?",
        "answer": "From downtown Lisbon, the metro's red line provides a direct, fast connection to Humberto Delgado Airport in about 20 minutes, making it the most popular and efficient option. Aerobus shuttle buses also run frequently from the city center, taking roughly 20 to 40 minutes depending on the route, with tickets valid for 24 hours. Taxis and ride‑share services are readily available and offer a door‑to‑door journey of around 15 to 25 minutes, though they are the priciest choice. Driving yourself is possible, with short‑term parking at the airport, but navigating city traffic can be slow, and parking fees add up.",
        "toolsUsed": [],
        "references": [
          {
            "url": "http://lisbon-lis.airports-guides.com",
            "title": "Lisbon Portela Airport (LIS) Information: LIS Airport in Lisbon Area, Portugal"
          },
          {
            "url": "http://www.lisbon-lis.airports-guides.com/lis_airport_transport.html",
            "title": "Lisbon Portela Airport (LIS) Travel, Transport: Travel at Airports in Lisbon Area, Portugal",
            "time_published": "2016-03-03T00:00:00Z"
          },
          {
            "url": "https://www.lisbon-airport.net/",
            "title": "Lisbon Airport (LIS)"
          },
          {
            "url": "https://lisbonairport.net/lisbon-airport-transfers/bus/",
            "title": "Getting to Lisbon Airport by Bus",
            "time_published": "2019-03-02T00:00:00Z"
          },
          {
            "url": "https://lisbonairport.net",
            "title": "Lisbon Airport | Guide to Lisbon Airport (LIS)"
          }
        ]
      },
      "q15": {
        "question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at Ronald Reagan National Airport?",
        "answer": "Ronald Reagan National Airport offers free Wi‑Fi throughout the terminals. An interfaith chapel is available for prayer, though specific locations within the terminals are not detailed. Information on currency exchange offices is not mentioned in the available airport details.",
        "toolsUsed": [],
        "references": [
          {
            "url": "https://flyreagan.com/about-reagan-national-airport",
            "title": "flyreagan.com - About Reagan National Airport",
            "time_published": "2022-03-01T00:00:00Z"
          },
          {
            "url": "https://www.flyreagan.com/",
            "title": "Official Website of Ronald Reagan Washington National Airport - DCA",
            "favicon": "https://www.flyreagan.com/themes/custom/mwaa_barrio/favicon.ico",
            "time_published": "2026-06-16T00:00:00Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Ronald%20Reagan%20Washington%20National%20Airport",
            "title": "Ronald Reagan Washington National Airport",
            "time_published": "2026-04-22T18:33:09Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Ronald%20Reagan%20Washington%20National%20Airport%20station",
            "title": "Ronald Reagan Washington National Airport station",
            "time_published": "2026-04-07T00:26:26Z"
          },
          {
            "url": "https://www.mwaa.com/policefireems/fire-ems/fire-ems-ronald-reagan-washington-national-airport",
            "title": "mwaa.com - Fire & EMS at Ronald Reagan Washington National Airport",
            "favicon": "https://www.mwaa.com/themes/custom/mwaa_barrio/favicon.ico",
            "time_published": "2023-07-01T00:00:00Z"
          }
        ]
      },
      "q17": {
        "question": "What aircraft are typically used on flights from Lisbon to Washington?",
        "answer": "Nonstop flights from Lisbon to Washington are operated by United Airlines using the Boeing 777. On connecting itineraries, the most common long-haul aircraft are the Boeing 777-300ER (via Toronto or Frankfurt), Boeing 787-10 (via Newark), and Airbus A340-600 (via Frankfurt), with other types like the A330-300, 787-8, and A380-800 appearing less frequently on certain routings. The exact aircraft can vary by day and airline, but the Boeing 777 family and 787-10 are the most prevalent on this route.",
        "methodology": "Aircraft types are taken from the equipment each operating carrier schedules on this route, drawn from published airline timetables and airline equipment schedules in our flight-schedule database. They describe typical scheduled aircraft and can vary with seasonal or day-of-week assignments and last-minute equipment swaps.",
        "toolsUsed": [
          "route_aircraft"
        ]
      },
      "q20": {
        "question": "What are the best airport lounge options when departing from Lisbon?",
        "answer": "Lisbon Portela Airport has a single terminal with one main lounge: the ANA Lounge Lisbon, located airside near Gate 22 on Floor 6, accessible to both Schengen and non-Schengen passengers. It’s open daily from 4:00 AM to 11:00 PM and offers complimentary alcoholic drinks (up to three per guest), a smoking room, air conditioning, and disabled access. Access is available through Priority Pass, and children under two enter free; a smart casual dress code applies.",
        "toolsUsed": [],
        "references": [
          {
            "url": "http://lisbon-lis.airports-guides.com",
            "title": "Lisbon Portela Airport (LIS) Information: LIS Airport in Lisbon Area, Portugal"
          },
          {
            "url": "https://my.prioritypass.com/en-GB/lounges/portugal/lisbon-portela",
            "title": "Lisbon Airport LIS Lounges - LIS Airport Guide and lounges.  | Priority Pass",
            "time_published": "2024-11-05T00:00:00Z"
          },
          {
            "url": "https://prioritypass.com/en-GB/lounges/portugal/lisbon-portela/lis6-ana-lounge-lisbon",
            "title": "ANA Lounge Lisbon LIS AIRPORT Terminal 1 Lisbon Portela | Priority Pass",
            "time_published": "2024-11-05T00:00:00Z"
          },
          {
            "url": "http://www.lisbon-lis.airports-guides.com/lis_airport_airlines.html",
            "title": "Lisbon Portela Airport (LIS) Airlines and Terminals: Airlines at Airports in Lisbon Area, Portugal",
            "time_published": "2016-03-03T00:00:00Z"
          },
          {
            "url": "https://americanexpress.com/en-us/travel/lounges/the-platinum-card/LIS",
            "title": "American Express Lounges at Lisbon Portela Airport | Amex US",
            "favicon": "https://www.americanexpress.com/apple-touch-icon-152x152.png"
          }
        ]
      },
      "q21": {
        "question": "What is the baggage allowance on this route from Lisbon to Washington?",
        "answer": "Baggage rules depend on the carrier and fare class. Basic economy tickets often have strict limits, while standard international economy typically includes one checked bag and a carry‑on. Premium cabins offer more generous allowances."
      },
      "q22": {
        "question": "What cabin and seat options are typical from Lisbon to Washington?",
        "answer": "Lisbon to Washington flights typically offer Economy and flat-bed Business class, with Premium Economy available on select airlines."
      },
      "q23": {
        "question": "Are same‑day changes or standby possible on this route?",
        "answer": "Policies vary by airline and fare; flexible and premium cabin tickets often allow same‑day changes or standby, while Basic Economy typically does not."
      }
    }
  }
}