{"response": {"Key": "DTT-FRA", "orig": {"code": "DTT", "type": "airport", "city": "Detroit", "fullCity": "Detroit, Michigan", "airport": "Detroit Metro Airport"}, "dest": {"code": "FRA", "type": "airport", "city": "Frankfurt am Main", "fullCity": "Frankfurt am Main, Germany", "airport": "Frankfurt Airport"}, "faq": {"q0": {"question": "What is the typical flight duration from Detroit to Frankfurt am Main?", "answer": "The flight from Detroit to Frankfurt is about 4,150 miles. The typical nonstop flight time is 7 hours 45 minutes eastbound, while the return leg takes about 9 hours 30 minutes — over an hour and a half longer due to prevailing headwinds.", "methodology": "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": ["flight_schedule"]}, "q1": {"question": "Are there any direct flights from Detroit to Frankfurt am Main?", "answer": "Delta and Lufthansa both fly non‑stop from Detroit (DTW) to Frankfurt (FRA), each operating daily. Delta runs about 36 weekly departures — typically five or six a day — in the late afternoon and early evening, while Lufthansa offers around 22 weekly flights across four afternoon departure slots. The flight takes roughly 7 hours 45 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"]}, "q3": {"question": "What are the ground transportation options in Frankfurt am Main?", "answer": "Frankfurt Airport (FRA) offers several ground transportation options to reach the city center. The most used and fastest is the S-Bahn (suburban train), specifically lines S8 and S9, which connect directly to central Frankfurt in about 11 minutes. Regional and long-distance trains also stop at the airport's train station, providing wider connections. Taxis and ride-hailing services like Uber are readily available, with a trip to the city center taking roughly 20–30 minutes. Car rentals are offered at the airport, and buses—including the Lufthansa Express Bus—serve various routes.", "toolsUsed": ["article_lookup"], "references": [{"url": "https://frankfurt-airport.com/en/transport-and-parking/to-from-the-airport.html", "title": "To & from the Frankfurt Airport", "favicon": "https://frankfurt-airport.com/etc.clientlibs/fraport-travel/clientlibs/fraport-travel.app/resources/img/apple-touch-icon.png", "time_published": "2026-02-27T11:54:48Z"}, {"url": "https://frankfurt-airport.com/en/transport-and-parking/to-from-the-airport.suffix.html/a20260107lh491.html", "title": "To & from the Frankfurt Airport", "favicon": "https://frankfurt-airport.com/etc.clientlibs/fraport-travel/clientlibs/fraport-travel.app/resources/img/apple-touch-icon.png", "time_published": "2026-02-27T11:54:48Z"}, {"url": "https://en.wikipedia.org/wiki/Frankfurt%20Airport%20%28disambiguation%29", "title": "Frankfurt Airport (disambiguation)", "time_published": "2026-03-07T17:02:43Z"}, {"url": "https://en.wikipedia.org/wiki/Frankfurt%20Airport", "title": "Frankfurt Airport", "time_published": "2026-04-30T23:33:28Z"}, {"url": "https://www.fraport.com/en/newsroom/press-releases/2026/q1/frankfurt-airport-and-bangalore-international-airport-conclude-s.html", "title": "Frankfurt Airport and Bangalore International Airport Conclude Strategic Cargo Partnership", "favicon": "https://www.fraport.com/etc.clientlibs/fraport-company/clientlibs/frach-app/resources/favicons/apple-icon-180x180.png", "time_published": "2026-02-25T00:00:00Z"}]}, "q4": {"question": "When is the cheapest time to fly from Detroit to Frankfurt am Main?", "answer": "The cheapest months to fly from Detroit to Frankfurt am Main are October and November, with average fares around $921, followed by September at $998. The most expensive months are June, averaging $1,403, and May at $1,241, with July also high at $1,234.", "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.", "toolsUsed": ["seasonal_prices"]}, "q5": {"question": "How far in advance should I book tickets from Detroit to Frankfurt am Main?", "answer": "For flights from Detroit to Frankfurt am Main, the best time to book is about 11 to 14 weeks in advance, when average fares settle around $1016. Booking exactly 90 days out can yield the lowest single fare at $991, while last-minute tickets near departure can spike to over $1400. Summer and holiday periods typically see higher demand, so aiming for that 11–14 week window is even more important during those peak times.", "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.", "toolsUsed": ["booking_timing"]}, "q6": {"question": "Are overnight (red‑eye) flights available from Detroit to Frankfurt am Main?", "answer": "There are no nonstop red-eye flights from Detroit to Frankfurt, but several one-stop overnight itineraries are available where the long transatlantic leg operates as a red-eye. From Detroit itself, Delta offers overnight legs departing DTW at 4:35 PM arriving Amsterdam at 6:00 AM (connecting to KLM), at 6:30 PM arriving Amsterdam at 8:15 AM, at 6:45 PM arriving Paris CDG at 8:40 AM, and at 9:20 PM arriving Paris CDG at 11:05 AM (Air France), while Air France also has a 9:20 PM departure arriving CDG at 11:05 AM. Other connecting red-eyes route through Atlanta, New York JFK, Charlotte, Montreal, Toronto, Boston, Chicago O'Hare, and Washington Dulles on carriers including Delta, American, Air Canada, Lufthansa, Condor, and Singapore Airlines.", "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 Detroit to Frankfurt am Main?", "answer": "Delta and Lufthansa fly nonstop from Detroit to Frankfurt, with up to 36 weekly flights on Delta and 22 on Lufthansa, both operating daily. Typical fares aren't listed, but Delta and Lufthansa dominate this route with multiple daily departures.", "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 Detroit and Frankfurt am Main?", "answer": "Common layover cities between Detroit and Frankfurt include Amsterdam, Paris, London, and Reykjavík. Amsterdam and Paris offer efficient transfers and broad European connections on SkyTeam partners. London provides extensive oneworld links, though a transit visa may be needed for some nationalities. Reykjavík allows for a shorter northern routing with visa‑free transit for many passengers and competitive total travel times."}, "q10": {"question": "Which months have the best weather for traveling to Frankfurt am Main?", "answer": "May through June and September provide mild temperatures and thinner tourist crowds."}, "q11": {"question": "What documents should I bring with me to the airport when flying from Detroit to Frankfurt am Main?", "answer": "Bring a passport valid for at least three months beyond your stay, any required visa or ETIAS authorization, proof of onward or return travel, a payment method for baggage and any necessary vaccination or insurance documents."}, "q12": {"question": "Which airport should I use in Frankfurt am Main?", "answer": "Frankfurt has only one commercial airport, Frankfurt Airport. It is a major international hub located about 12 km southwest of the city centre, easily reached by train or taxi."}, "q13": {"question": "How do I get to Detroit Metro Airport from the city center?", "answer": "Detroit Metropolitan Airport (DTW) is about 18 miles southwest of downtown Detroit. The Detroit Air Xpress (DAX) bus is the most popular public transit option, offering direct service from both terminals to downtown with fares around $6–$8. Ride‑share and taxis are faster, typically 20–30 minutes, but cost significantly more. Driving and parking at the airport is also an option, with on‑site lots available.", "toolsUsed": ["article_lookup"], "references": [{"url": "https://metroairport.com/dtw/other-ground-transportation/public-transportation", "title": "Public Transportation | Wayne County Airport Authority", "favicon": "https://metroairport.com/themes/custom/wcaa/images/favicons/apple-touch-icon.png"}, {"url": "https://metroairport.com/about-dtw", "title": "About DTW | Wayne County Airport Authority", "favicon": "https://metroairport.com/themes/custom/wcaa/images/favicons/apple-touch-icon.png", "time_published": "2026-04-13T12:00:00Z"}, {"url": "https://www.faa.gov/air_traffic/publications/atpubs/ntap_feb_18/EC10000.html", "title": "Michigan. Detroit Metropolitan Wayne County Airport (DTW) Standard Taxi Routes", "time_published": "2018-02-01T00:00:00Z"}, {"url": "https://en.wikipedia.org/wiki/Detroit%20Metropolitan%20Airport", "title": "Detroit Metropolitan Airport", "time_published": "2026-04-30T20:15:38Z"}, {"url": "https://www.faa.gov/air_traffic/publications/atpubs/ntap_aug_18/EC10000.html", "title": "Michigan. Detroit Metropolitan Wayne County Airport (DTW) Standard Taxi Routes"}]}, "q14": {"question": "Are there hotels or sleeping facilities at Frankfurt am Main airport?", "answer": "Frankfurt Airport has the MY CLOUD Transit Hotel directly inside Terminal 1 at Gate Z25, accessible without leaving the transit area for passengers on non‑Schengen flights and bookable by the hour. Several full‑service hotels are connected to Terminal 1 via a covered walkway, including the Marriott and Sheraton, so no shuttle is needed. Additional nearby hotels offer shuttle service for a small fee, and there are no capsule hotels or sleeping pods inside the terminals.", "toolsUsed": ["article_lookup"], "references": [{"url": "https://www.sleepinginairports.net/guides/frankfurt-airport-guide.htm", "title": "Frankfurt Airport Guide (FRA) - 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": "2018-08-23T20:52:20Z"}, {"url": "https://frankfurt-airport.com/en/transport-and-parking/parking/park-sleep-fly.html", "title": "Park, Sleep & Fly", "time_published": "2026-04-27T11:03:40Z"}, {"url": "https://www.sleepinginairports.net/sleep-guide/sleeping-in-frankfurt-airport.htm", "title": "Sleeping in Frankfurt Airport", "time_published": "2024-09-12T00:00:00Z"}, {"url": "https://www.frankfurt-airport.com/en/travel-planning/hotels/my-cloud-transit-hotel.html", "title": "MY CLOUD Transit Hotel", "time_published": "2026-01-26T13:39:05Z"}, {"url": "https://all.accor.com/a/ko/destination/place/hotels-frankfurt-airport-ci2648.html", "title": "프랑크푸르트 프랑크푸르트 공항 주변 호텔: all.accor.com에서 예약하기", "time_published": "2026-05-01T00:00:00Z"}, {"url": "https://www.frankfurt-airport.com/en/services/hotels/my-cloud-transit-hotel.html", "title": "MY CLOUD Transit Hotel", "time_published": "2025-07-14T00:00:00Z"}]}, "q15": {"question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at Frankfurt Airport?", "answer": "Frankfurt Airport offers free Wi‑Fi around the clock for passengers and visitors. Currency exchange offices are available in both Terminal 1 and Terminal 2, typically in the landside and airside areas. The airport also provides an airport chaplaincy open to everyone, with prayer and meditation rooms located in Terminal 1 (Area B, Level 2) and Terminal 2 (Area D, Level 3).", "toolsUsed": ["article_lookup"], "references": [{"url": "https://frankfurt-airport.com/en/locations/r/rufsaeule-fuer-betreuung_55d48900345d2.html", "title": "FraCareServices", "favicon": "https://frankfurt-airport.com/etc.clientlibs/fraport-travel/clientlibs/fraport-travel.app/resources/img/apple-touch-icon.png", "time_published": "2026-06-10T14:10:00Z"}, {"url": "https://frankfurt-airport.com/en/services/facilities-and-services.html", "title": "Facilities & Services at Frankfurt Airport", "time_published": "2026-03-17T15:02:52Z"}, {"url": "https://www.fraport.com/en/newsroom/service-news/2018/taking-piers-d-and-e-to-a-new-level-of-passenger-friendliness.html", "title": "Taking Piers D and E to a New Level of Passenger Friendliness", "time_published": "2018-10-31T00:00:00Z"}, {"url": "https://en.wikipedia.org/wiki/Frankfurt_Airport_long-distance_station", "title": "Frankfurt Airport long-distance station", "time_published": "2026-05-30T16:06:23Z"}, {"url": "https://www.fraport.com/en/newsroom/press-kit.html", "title": "Press Kit", "time_published": "2025-07-01T00:00:00Z"}]}, "q16": {"question": "Are there accessible services or children's facilities at the Detroit and Frankfurt am Main airports?", "answer": "At Detroit Metropolitan Wayne County Airport (DTW), wheelchair assistance is available through your airline upon arrival at the ticket counter, and accessible features include Braille signage, hearing loops at select gates, family restrooms, and a sensory-friendly tunnel with a pause button. At Frankfurt Airport (FRA), FraCareServices provides mobility and disability assistance for arrivals, departures, and transfers, with registration required at least 48 hours in advance through your airline or travel agent.", "toolsUsed": ["article_lookup"], "references": [{"url": "https://metroairport.com/at-dtw/getting-around/accessibility-additional-assistance", "title": "Accessibility & Additional Assistance | Wayne County Airport Authority", "favicon": "https://metroairport.com/themes/custom/wcaa/images/favicons/apple-touch-icon.png"}, {"url": "https://metroairport.com/about-us/contact-us", "title": "Contact Us | Wayne County Airport Authority", "favicon": "https://metroairport.com/themes/custom/wcaa/images/favicons/apple-touch-icon.png"}, {"url": "https://www.faa.gov/air_traffic/publications/atpubs/ntap_feb_18/EC10000.html", "title": "Michigan. Detroit Metropolitan Wayne County Airport (DTW) Standard Taxi Routes", "time_published": "2018-02-01T00:00:00Z"}, {"url": "https://www.faa.gov/air_traffic/publications/atpubs/ntap_aug_18/EC10000.html", "title": "Michigan. Detroit Metropolitan Wayne County Airport (DTW) Standard Taxi Routes"}, {"url": "https://en.wikipedia.org/wiki/Detroit%20Metropolitan%20Airport", "title": "Detroit Metropolitan Airport", "time_published": "2026-04-30T20:15:38Z"}, {"url": "https://frankfurt-airport.com/en/locations/r/rufsaeule-fuer-betreuung_55d48900345d2.html", "title": "FraCareServices", "favicon": "https://frankfurt-airport.com/etc.clientlibs/fraport-travel/clientlibs/fraport-travel.app/resources/img/apple-touch-icon.png", "time_published": "2026-06-10T14:10:00Z"}, {"url": "https://frankfurt-airport.com/en/locations/r/rufsaeule-fuer-betreuung_55d48900345d2/betreuungsdienst.html", "title": "FraCareServices Assistance Service", "favicon": "https://frankfurt-airport.com/etc.clientlibs/fraport-travel/clientlibs/fraport-travel.app/resources/img/apple-touch-icon.png", "time_published": "2026-06-10T14:10:00Z"}, {"url": "https://www.fraport.com/en/contact.html", "title": "Contact", "time_published": "2025-09-24T00:00:00Z"}, {"url": "https://www.fraport.com/en/our-group/our-global-group-airports-and-companies/FraCareServices-GmbH.html", "title": "FraCareServices GmbH", "time_published": "2021-05-19T00:00:00Z"}, {"url": "https://en.wikipedia.org/wiki/Frankfurt%20Airport%20%28disambiguation%29", "title": "Frankfurt Airport (disambiguation)", "time_published": "2026-03-07T17:02:43Z"}]}, "q17": {"question": "What aircraft are typically used on flights from Detroit to Frankfurt am Main?", "answer": "The nonstop flights from Detroit to Frankfurt am Main are operated with the Airbus A330-200 by Delta and the Boeing 787-9 by Lufthansa. Connecting itineraries often use a mix of Airbus A330 variants (including the A330-200, A330-300, and A330-900neo) on the long transatlantic leg, alongside Boeing 787-8, 787-9, 777-200, and occasionally 747-400 or 747-8I aircraft, depending on the routing and airline. The exact aircraft can vary by day and by airline, and while Wi-Fi and seatback entertainment are widely available on these long-haul flights, specific offerings depend on the carrier and aircraft configuration.", "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"]}, "q18": {"question": "Which airline alliances serve flights from Detroit to Frankfurt am Main?", "answer": "Delta and Lufthansa fly nonstop from Detroit to Frankfurt. Delta is a member of SkyTeam and Lufthansa belongs to Star Alliance, so both SkyTeam and Star Alliance serve this route directly. No major operating carrier on this nonstop route is unaffiliated with an 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 Detroit?", "answer": "Detroit Metropolitan Airport (DTW) has several lounges: in the McNamara Terminal, Delta operates four Sky Clubs at gates A18, A38, A43, and A68, plus one in Concourse C, accessible to Delta One, SkyTeam Elite Plus, or with a Delta Sky Club membership or qualifying credit card; in the Evans Terminal, the Lufthansa Business Lounge near gate D8 welcomes business-class passengers and Star Alliance Gold members, and also accepts Priority Pass during its limited morning and evening hours. The Lufthansa lounge offers Wi‑Fi, drinks, and flight monitors, while Delta Sky Clubs feature complimentary snacks, beverages, and showers.", "toolsUsed": ["article_lookup"], "references": [{"url": "https://americanexpress.com/en-us/travel/lounges/the-platinum-card/DTW", "title": "American Express Lounges at Detroit Metropolitan Wayne County Airport | Amex US", "time_published": "2026-05-03T00:00:00Z"}, {"url": "https://americanexpress.com/en-th/travel/lounges/the-platinum-card/DTW", "title": "American Express Lounges at Detroit Metropolitan Wayne County Airport | Amex TH", "favicon": "https://www.americanexpress.com/apple-touch-icon-152x152.png"}, {"url": "https://my.prioritypass.com/en-GB/lounges/united-states-of-america/detroit-metropolitan-wayne-county/dtw8-minute-suites", "title": "Detroit Metropolitan Airport DTW Lounges - DTW Airport Guide and lounges.  | Priority Pass", "time_published": "2024-11-05T00:00:00Z"}, {"url": "https://my.prioritypass.com:443/en-GB/lounges/united-states-of-america/detroit-metropolitan-wayne-county/dtw5-lufthansa-business-lounge", "title": "Lufthansa Business Lounge DTW AIRPORT Warren C. Evans Terminal Detroit MI Metropolitan Wayne County | Priority Pass", "time_published": "2024-11-05T00:00:00Z"}, {"url": "https://www.delta.com/us/en/airports/united-states/detroit-sky-club-airport-map", "title": "Detroit Metro (DTW) Airport Map & Lounges | Delta Air Lines", "time_published": "2023-01-01T00:00:00Z"}]}, "q21": {"question": "What is the baggage allowance on this route from Detroit to Frankfurt am Main?", "answer": "Baggage allowances on Detroit–Frankfurt flights depend on the airline and fare type. Basic Economy fares typically do not include a checked bag, while standard economy usually includes one checked bag and a carry-on. Premium cabins offer more generous allowances."}, "q22": {"question": "What cabin and seat options are typical from Detroit to Frankfurt am Main?", "answer": "Flights from Detroit to Frankfurt typically offer Economy, Premium Economy, and flat-bed Business class on nonstop services, with First class available on select airlines."}, "q23": {"question": "Are same‑day changes or standby possible on this route?", "answer": "Policies differ by airline and fare class; flexible, premium, and business fares often allow same-day changes or standby, while restrictive economy tickets typically do not."}}}}