{
  "response": {
    "Key": "MEM-SJU",
    "orig": {
      "code": "MEM",
      "type": "airport",
      "city": "Memphis",
      "fullCity": "Memphis, Tennessee",
      "airport": "Memphis Intl Airport"
    },
    "dest": {
      "code": "SJU",
      "type": "airport",
      "city": "San Juan",
      "fullCity": "San Juan, Puerto Rico",
      "airport": "Luis Munoz Marin Intl Airport"
    },
    "faq": {
      "q0": {
        "question": "What is the typical flight duration from Memphis to San Juan?",
        "answer": "There is no scheduled nonstop service from Memphis to San Juan, so the journey requires a connection and typically takes about 6 to 9 hours total. The flight covers approximately 1,860 miles.",
        "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 Memphis to San Juan?",
        "answer": "There are no nonstop flights from Memphis to San Juan. The shortest connecting routings are on American Airlines via Charlotte (about 6h 40m total) or via Miami (about 6h 15m), or on United via Houston (about 7h 50m). These one-stop itineraries run daily, with connections in Charlotte offering the most frequent service.",
        "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. Stop counts, connecting hubs, and per-airline prices are drawn from a large sample of the real fares Priceline users found on this route in the last 72 hours. We group those fares by number of stops, by the hub airport a connection routes through, and by operating airline, and report each group's share of the sample alongside its lowest and median price.",
        "toolsUsed": [
          "route_airlines",
          "flight_schedule",
          "route_options"
        ]
      },
      "q2": {
        "question": "Are there visa requirements to travel from Memphis to San Juan?",
        "answer": "For a United States national, travel from Memphis to San Juan is entry by right, not a visa question, since Puerto Rico is United States territory. No visa is needed for a short tourist visit, and there is no permitted length of stay separate from the right of a national to be in their own country.\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://cbp.gov/about/contact/ports/fajardo-puerto-rico-4904",
            "title": "Fajardo, Puerto Rico - 4904 | U.S. Customs and Border Protection"
          },
          {
            "url": "https://uscis.gov/archive/effects-of-puerto-rico-birth-certificate-invalidation-on-uscis-benefit-seekers",
            "title": "Effects of Puerto Rico Birth Certificate Invalidation on USCIS Benefit Seekers | USCIS"
          }
        ],
        "preopenedReferences": true,
        "stageOnly": true
      },
      "q3": {
        "question": "What are the ground transportation options in San Juan?",
        "answer": "San Juan's Luis Muñoz Marín International Airport is connected to the city center primarily by taxi, ride share services, and rental cars, with the Teodoro Moscoso Bridge linking the airport to the Hato Rey financial district and Old San Juan via the Baldorioty de Castro Expressway. Public mass transit is limited to the Tren Urbano metro system, which serves the wider metropolitan area but does not extend directly to the airport. Taxis and ride share are the most commonly used options for visitors heading to hotels and Old San Juan, offering the fastest door-to-door service. Car rentals are widely available and popular for exploring the island beyond San Juan.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://en.wikipedia.org/wiki/Luis_Mu%C3%B1oz_Mar%C3%ADn_International_Airport",
            "title": "Luis Muñoz Marín International Airport",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-09-14T07:54:59Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Rail_transport_in_Puerto_Rico",
            "title": "Rail transport in Puerto Rico",
            "time_published": "2026-07-26T15:19:48Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Transportation_in_Puerto_Rico",
            "title": "Transportation in Puerto Rico",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-04-24T20:08:05Z"
          }
        ]
      },
      "q4": {
        "question": "When is the cheapest time to fly from Memphis to San Juan?",
        "answer": "Flights from Memphis to San Juan bottom out in late January, when average fares drop to around $354. The cheapest months overall are September (averaging $365), January ($371), and October ($385), while the most expensive stretch is late December, averaging $487.",
        "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 Memphis to San Juan?",
        "answer": "The optimal booking window for flights from Memphis to San Juan is roughly 4 to 7 weeks before departure, when average fares sit around $315. The single cheapest day to book is 45 days out at $313, while booking much earlier (e.g. 175 days ahead) can cost about $466. For summer and holiday periods, fares tend to climb and the best prices usually require booking earlier within that 4-7 week range or slightly beyond, as last-minute bookings push prices above $400.",
        "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 Memphis to San Juan?",
        "answer": "No red‑eye flights are available from Memphis to San Juan — neither nonstop nor connecting itineraries with an overnight 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 Memphis to San Juan?",
        "answer": "There is no nonstop service from Memphis to San Juan, so travelers connect through one of several hubs. Southwest Airlines connects via Orlando and Nashville, with up to six daily one-stop options combined, while United routes through Houston. American Airlines offers connections through Charlotte and Dallas/Fort Worth, though with fewer daily frequencies than the Southwest options.",
        "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 Memphis and San Juan?",
        "answer": "Common layovers between Memphis and San Juan include Atlanta, Charlotte, Miami, and Dallas/Fort Worth. These hubs offer frequent flights, efficient connections, and broad networks, keeping total travel time competitive."
      },
      "q10": {
        "question": "Which months have the best weather for traveling to San Juan?",
        "answer": "Mid-December to April offers sunny, warm temperatures and lower humidity, avoiding the peak hurricane season crowds."
      },
      "q11": {
        "question": "What documents should I bring with me to the airport when flying from Memphis to San Juan?",
        "answer": "Since Puerto Rico is a U.S. territory, this is a domestic flight; bring a Real ID or passport, a payment method for bags, and any required health documents."
      },
      "q12": {
        "question": "Which airport should I use in San Juan?",
        "answer": "Luis Muñoz Marín International Airport is the only commercial airport serving San Juan, located about 3 miles southeast of downtown."
      },
      "q13": {
        "question": "How do I get to Memphis Intl Airport from the city center?",
        "answer": "Getting to Memphis International Airport from downtown Memphis is easiest by rideshare (Uber/Lyft) or taxi, which are the most popular and quickest options, typically taking about 15–20 minutes. Public transit is available via MATA bus route 28, which stops at the airport on the baggage level, and is the most budget-friendly choice though slower. Several hotels also offer shuttle buses to the airport, and driving yourself is straightforward via I-240 with parking available from about $9 per day in the Ground Transportation Center.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://flymemphis.com/parking-transportation",
            "title": "Parking & Transportation - MEM",
            "favicon": "https://i0.wp.com/flymemphis.com/wp-content/uploads/2018/06/cropped-11009951_1601904913357707_5087342235373522644_n.png?fit=180%2C180&ssl=1",
            "time_published": "2026-08-11T14:59:48Z"
          },
          {
            "url": "https://flymemphis.com/ground-transportation/",
            "title": "Rental Cars, Shuttles, & Taxis - MEM",
            "favicon": "https://i0.wp.com/flymemphis.com/wp-content/uploads/2018/06/cropped-11009951_1601904913357707_5087342235373522644_n.png?fit=180%2C180&ssl=1",
            "time_published": "2026-08-11T14:30:04Z"
          },
          {
            "url": "https://flymemphis.com",
            "title": "MEM - Frederick W. Smith International Airport",
            "favicon": "https://i0.wp.com/flymemphis.com/wp-content/uploads/2018/06/cropped-11009951_1601904913357707_5087342235373522644_n.png?fit=180%2C180&ssl=1"
          },
          {
            "url": "https://www.airport.guide/kmem",
            "title": "Memphis Airport (MEM) | Terminal maps | Airport guide",
            "favicon": "https://www.airport.guide/apple-touch-icon.png"
          },
          {
            "url": "https://www.airport.guide/kmem/directory",
            "title": "Memphis Airport MEM | Directory",
            "favicon": "https://www.airport.guide/apple-touch-icon.png"
          }
        ]
      },
      "q14": {
        "question": "Are there hotels or sleeping facilities at San Juan airport?",
        "answer": "San Juan Airport has a hotel directly at the airport — the San Juan Airport Hotel, a mid-range property located in Terminal D on the landside with direct terminal access. There are no sleep cabins, pods, or day rooms available. A few nearby hotels within a 10-minute drive exist, but they do not offer airport shuttles.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://sleepinginairports.net/guides/san-juan-airport-guide.htm",
            "title": "San Juan Airport Guide (SJU) - 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": "2018-10-02T00:00:36Z"
          },
          {
            "url": "https://hilton.com/en/locations/puerto-rico/san-juan/sju-luis-munoz-marin-international-airport",
            "title": "Hotels near Luis Munoz Marin International Airport, San Juan, Puerto Rico - Find Hotels - Hilton",
            "favicon": "https://www.hilton.com/modules/assets/img/brand/WW/favicon_WW.svg"
          },
          {
            "url": "https://sleepinginairports.net/reviews/san-juan-airport-reviews.htm",
            "title": "San Juan Luis Muñoz Marín   Airport Reviews (SJU) – Sleeping in Airports",
            "favicon": "https://www.sleepinginairports.net/wp-content/uploads/2018/09/cropped-sia-logo-180x180.png"
          },
          {
            "url": "https://hilton.com/th/locations/puerto-rico/san-juan/sju-luis-munoz-marin-international-airport/casino/embassy-suites",
            "title": "โรงแรม Embassy Suites Casino ใกล้สนามบินนานาชาติ Luis Munoz Marin ซานฮวน เปอร์โตริโก - ค้นหาโรงแรม - Hilton",
            "favicon": "https://www.hilton.com/modules/assets/img/brand/ES/favicon_ES.svg"
          }
        ]
      },
      "q15": {
        "question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at Luis Munoz Marin Intl Airport?",
        "answer": "Luis Muñoz Marín International Airport offers free Wi-Fi throughout its terminals, along with currency exchange services in the arrivals and departures areas. Prayer rooms or chapels are available for travelers seeking a quiet space for reflection. These facilities are spread across the main terminal building, which houses four concourses and a separate terminal with one concourse.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://en.wikipedia.org/wiki/San_Juan_Luis_Mu%C3%B1oz_Mar%C3%ADn_International_Airport",
            "title": "Luis Muñoz Marín International Airport",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2002-09-10T02:45:15Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Luis_Mu%C3%B1oz_Mar%C3%ADn_International_Airport",
            "title": "Luis Muñoz Marín International Airport",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-09-14T07:54:59Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Luis%20Mu%C3%B1oz%20Mar%C3%ADn%20International%20Airport",
            "title": "Luis Muñoz Marín International Airport",
            "time_published": "2026-04-23T21:46:13Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Transportation_in_Puerto_Rico",
            "title": "Transportation in Puerto Rico",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-04-24T20:08:05Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Port%20of%20San%20Juan",
            "title": "Port of San Juan",
            "time_published": "2025-11-09T08:46:28Z"
          }
        ]
      },
      "q16": {
        "question": "Are there accessible services or children's facilities at the Memphis and San Juan airports?",
        "answer": "At Memphis International Airport, wheelchair assistance can be requested from airline ticket counters or by calling 901-922-8000, and passengers should inform their airline during booking if they will need a wheelchair on arrival. Accessible parking, ADA-compliant restrooms, family/unisex restrooms throughout the terminal, a hearing loop, and the Aira app for visually impaired travelers are available at MEM. Travelers on the Memphis–San Juan route should arrange any mobility assistance through their airline at least 48 hours before the flight.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://flymemphis.com/passenger-services/",
            "title": "Passenger Services & Accessibility - MEM",
            "favicon": "https://i0.wp.com/flymemphis.com/wp-content/uploads/2018/06/cropped-11009951_1601904913357707_5087342235373522644_n.png?fit=180%2C180&ssl=1",
            "time_published": "2026-08-11T14:23:55Z"
          },
          {
            "url": "https://flymemphis.com/tag/special-needs/",
            "title": "special needs – Memphis International Airport – MEM",
            "favicon": "https://i0.wp.com/flymemphis.com/wp-content/uploads/2018/06/cropped-11009951_1601904913357707_5087342235373522644_n.png?fit=180%2C180&ssl=1",
            "time_published": "2026-05-18T00:00:00Z"
          },
          {
            "url": "https://flymemphis.com",
            "title": "MEM - Frederick W. Smith International Airport",
            "favicon": "https://i0.wp.com/flymemphis.com/wp-content/uploads/2018/06/cropped-11009951_1601904913357707_5087342235373522644_n.png?fit=180%2C180&ssl=1"
          },
          {
            "url": "https://www.airport.guide/kmem",
            "title": "Memphis Airport (MEM) | Terminal maps | Airport guide",
            "favicon": "https://www.airport.guide/apple-touch-icon.png"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Memphis_International_Airport",
            "title": "Memphis International Airport",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-09-01T19:00:23Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Luis_Mu%C3%B1oz_Mar%C3%ADn_International_Airport",
            "title": "Luis Muñoz Marín International Airport",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-09-14T07:54:59Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Luis_Mu%C3%B1oz_Marin_International_Airport",
            "title": "Luis Muñoz Marín International Airport - Wikipedia",
            "time_published": "2002-09-10T02:45:15Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/San_Juan_Luis_Mu%C3%B1oz_Mar%C3%ADn_International_Airport",
            "title": "Luis Muñoz Marín International Airport",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2002-09-10T02:45:15Z"
          },
          {
            "url": "https://en.wikipedia.org/wiki/Transportation_in_Puerto_Rico",
            "title": "Transportation in Puerto Rico",
            "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png",
            "time_published": "2026-04-24T20:08:05Z"
          }
        ]
      },
      "q17": {
        "question": "What aircraft are typically used on flights from Memphis to San Juan?",
        "answer": "There is no nonstop service from Memphis to San Juan, so all flights require a connection. United operates the most connecting itineraries, using a Boeing 737 MAX 9 on the long leg via Houston or Newark, with an Embraer 175 or Boeing 737-700 on the shorter leg. American Airlines connects via Miami or Charlotte, flying a Boeing 737-800 or Airbus A321-100 on the long leg and an Airbus A319 Ceo on the short leg.",
        "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": [
          "route_aircraft"
        ]
      },
      "q18": {
        "question": "Which airline alliances serve flights from Memphis to San Juan?",
        "answer": "The two main carriers operating connecting service from Memphis to San Juan are American Airlines (oneworld) and United Airlines (Star Alliance). No nonstop flights exist, and no carrier on this route is unaffiliated with a major 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"
        ]
      },
      "q20": {
        "question": "What are the best airport lounge options when departing from Memphis?",
        "answer": "Memphis International Airport has a Delta Sky Club in Terminal B, accessible to eligible Delta passengers and certain partner lounge members. The club is the only lounge listed for the airport, and no other lounge options are named.",
        "toolsUsed": [
          "article_lookup"
        ],
        "references": [
          {
            "url": "https://www.delta.com/us/en/airports/united-states/memphis-sky-club-airport-map",
            "title": "Memphis (MEM) Airport Map & Lounges | Delta Air Lines",
            "favicon": "https://www.delta.com/content/dam/delta-applications/dlhome/favicon.ico"
          },
          {
            "url": "https://americanexpress.com/en-us/travel/lounges/the-platinum-card/MEM",
            "title": "American Express Lounges at Memphis International Airport | Amex US",
            "favicon": "https://www.americanexpress.com/apple-touch-icon-152x152.png"
          },
          {
            "url": "https://aa.com/web/i18n/travelInformation/destinationInformation/mem-airport.html",
            "title": "Memphis, TN (MEM)",
            "favicon": "https://aa.com/content/images/chrome/rebrand/favicon.png"
          },
          {
            "url": "https://americanexpress.com/fi-fi/travel/lounges/the-platinum-card/MEM",
            "title": "American Express Lounges at Memphis International Airport | Amex FI",
            "favicon": "https://www.americanexpress.com/apple-touch-icon-152x152.png"
          },
          {
            "url": "https://www.airport.guide/kmem",
            "title": "Memphis Airport (MEM) | Terminal maps | Airport guide",
            "favicon": "https://www.airport.guide/apple-touch-icon.png"
          }
        ]
      },
      "q21": {
        "question": "What is the baggage allowance on this route from Memphis to San Juan?",
        "answer": "Baggage allowance on flights from Memphis to San Juan varies by airline and fare class. Basic economy tickets are restrictive and may not include a checked bag, while standard economy fares often include one checked bag and a carry‑on. Premium cabins provide more generous allowances."
      },
      "q22": {
        "question": "What cabin and seat options are typical from Memphis to San Juan?",
        "answer": "Flights from Memphis to San Juan usually offer Economy and sometimes domestic First with recliner seats; flat-bed Business is rare, and Premium Economy is not common on this route."
      },
      "q23": {
        "question": "Are same‑day changes or standby possible on this route?",
        "answer": "Policies vary by airline and fare class; flexible tickets and premium cabins often permit same‑day changes or standby, while restrictive fares typically do not."
      }
    }
  }
}