{"response": {"Key": "ICN-WAS", "orig": {"code": "ICN", "type": "airport", "city": "Seoul", "fullCity": "Seoul, Korea", "airport": "Incheon Intl 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 Seoul to Washington?", "answer": "The flight from Seoul to the Washington area covers about 6,940 miles. Nonstop service typically takes 13 hours 50 minutes eastbound, while the return leg against the jet stream is longer at 15 hours 25 minutes.", "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 Seoul to Washington?", "answer": "Yes, Korean Air and Air Premia both fly nonstop from Seoul Incheon to Washington Dulles. Korean Air runs twice daily (14 flights a week), while Air Premia operates four times a week on Monday, Wednesday, Friday, and Sunday. The nonstop flight takes roughly 13–14 hours 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. 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": ["route_airlines", "redeye_flights"]}, "q3": {"question": "What are the ground transportation options in Washington?", "answer": "At Washington Dulles (IAD), 26 miles from downtown DC, the fastest and most-used option is the Silver Line Express bus to the Wiehle-Reston East Metro station ($5, every 15–20 minutes) connecting to the Metrorail Silver Line into the city. Taxis and ride shares like Uber and Lyft offer door-to-door convenience, with taxi service operated by Washington Flyer available 24/7 from arrivals doors 2 and 6. Shared van services (SuperShuttle, Supreme Shuttle) and rental cars are also available. The Silver Line Express/Metrorail combination is the most popular for its balance of speed and cost, though no rail service runs overnight.", "toolsUsed": [], "references": [{"url": "https://flydulles.com/flight-schedule-dulles-international-airport-iad", "title": "flydulles.com - Flight Schedule - Dulles International Airport (IAD)", "time_published": "2022-03-01T00:00:00Z"}, {"url": "https://parking.flydulles.com/economy-parking", "title": "Dulles International Airport Parking | Economy Parking", "time_published": "2026-02-06T00:00:00Z"}, {"url": "https://www.mwaa.com/ipw-2017-archived", "title": "IPW 2017 - Archived", "time_published": "2021-02-01T00:00:00Z"}, {"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", "time_published": "2023-09-01T00:00:00Z"}, {"url": "https://en.wikipedia.org/wiki/Dulles%20International%20Airport", "title": "Dulles International Airport", "time_published": "2026-04-30T14:07:38Z"}]}, "q4": {"question": "When is the cheapest time to fly from Seoul to Washington?", "answer": "The cheapest time to fly from Seoul to Washington is late summer through fall, with average round-trip fares around $1,136 in September, $1,191 in October, and $1,205 in November. The most expensive months are early summer and December, with average fares reaching $1,691 in June, $1,594 in December, and $1,557 in May.", "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 Seoul to Washington?", "answer": "For flights from Seoul to Washington, the best fares are typically found when booking 7–10 weeks ahead, with the lowest price around $1,529 about 55 days before departure. Prices rise sharply for last-minute bookings, so aim for that 2–3 month window for the best deal.", "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 Seoul to Washington?", "answer": "No nonstop red‑eye flights operate from Seoul to Washington. Connecting itineraries with an overnight long leg are available, all on Asiana Airlines (OZ) from ICN to New York JFK departing at 21:05 and arriving at 23:00 the same night, then connecting to American, Delta, or United for the short hop into Washington after a long layover.", "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 Seoul to Washington?", "answer": "Korean Air and Air Premia fly nonstop from Seoul Incheon to Washington Dulles, with Korean Air operating twice daily and Air Premia offering four weekly flights. No nonstop service exists to Washington Reagan, but connecting itineraries are available through other carriers. Specific fare data is not available for this route.", "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 Seoul and Washington?", "answer": "Common layovers include Tokyo Narita, Incheon (for flights departing from Gimpo), and Istanbul, with Tokyo offering efficient transfers and Istanbul providing visa‑free transit for many nationalities."}, "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 than summer."}, "q11": {"question": "What documents should I bring with me to the airport when flying from Seoul to Washington?", "answer": "Bring a passport valid for at least six months beyond your stay, a valid U.S. visa or ESTA authorization, proof of onward travel, and payment for baggage, plus any required vaccination certificates."}, "q12": {"question": "Which airport should I use in Washington?", "answer": "Washington Dulles is the primary international gateway, located about 26 miles west of downtown, and is a major United hub with many global connections. Ronald Reagan National is just across the Potomac, very close to central DC and the National Mall, but mainly serves domestic and limited international flights. Baltimore/Washington International is farther north, offers a mix of domestic and some international service, and is a Southwest focus city."}, "q13": {"question": "How do I get to Incheon Intl Airport from the city center?", "answer": "From downtown Seoul, the AREX Airport Railroad express train is the fastest option, reaching Incheon Airport in about 43 minutes. Airport limousine buses are a popular and convenient alternative, offering direct service from major districts like Gangnam and Dongdaemun with fares around 17,000–18,000 KRW for adults. Taxis and ride‑share services provide door‑to‑door convenience, though they are pricier and subject to traffic. Driving and parking are possible, with both short‑term and long‑term lots available, but this is generally less popular due to congestion and parking fees.", "toolsUsed": [], "references": [{"url": "https://airport.kr/bbs/ap_en/937/138233/artclView.do", "title": "K2Web Wizard", "time_published": "2024-10-16T00:00:00Z"}, {"url": "https://www.airport.kr/ap_en/1507/subview.do", "title": "International Incheon Airport"}, {"url": "https://en.wikipedia.org/wiki/Transportation_in_Seoul", "title": "Transportation in Seoul", "time_published": "2025-09-22T07:17:16Z"}, {"url": "https://en.wikipedia.org/wiki/Incheon%20International%20Airport%20Terminal%201%20station", "title": "Incheon International Airport Terminal 1 station", "time_published": "2026-03-08T09:10:35Z"}, {"url": "https://airport.kr/ap_en/6604/subview.do", "title": "International Incheon Airport"}]}, "q14": {"question": "Are there hotels or sleeping facilities at Washington airport?", "answer": "Washington Dulles Airport (IAD) has a Sleepbox Lounge airside with 16 sound-proof rooms for rent, but no capsule hotels or free sleeping pods. The airport does not have a traditional on-site hotel inside the terminal, however the Washington Dulles Airport Marriott is located on airport grounds and connected by a free shuttle that runs every 15 minutes. Several other nearby hotels also offer shuttle service.", "toolsUsed": [], "references": [{"url": "https://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://www.sleepinginairports.net/sleep-guide/sleeping-in-washington-dulles-airport.htm", "title": "Sleeping in Washington Dulles Airport", "time_published": "2024-09-12T00:00:00Z"}, {"url": "https://www.marriott.com/en-us/hotels/iadap-washington-dulles-airport-marriott/overview/?scid=d2406702-e8ea-4b45-bb9b-69", "title": "Hotel near IAD Airport | Washington Dulles Airport Marriott", "time_published": "2025-02-19T00:00:00Z"}, {"url": "https://www.marriott.com/en-us/hotels/iadap-washington-dulles-airport-marriott/overview/?scid=f2ae0541-1279-4f24-b197-a979c79310b0", "title": "Hotel near IAD Airport | Washington Dulles Airport Marriott", "time_published": "2024-10-11T00:00:00Z"}, {"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", "time_published": "2026-07-17T00:00:00Z"}, {"url": "https://www.airportsdata.net/airport-IAD-accommodation/", "title": "Sleeping at Dulles airport - Washington D.C.", "time_published": "2025-12-01T00:00:00Z"}]}, "q17": {"question": "What aircraft are typically used on flights from Seoul to Washington?", "answer": "There is no nonstop service between Seoul Incheon and Washington, so typical aircraft vary by connecting hub. On the long trans‑Pacific leg, the Boeing 787‑9 is the most common type, used via Dallas‑Fort Worth, San Francisco, Toronto, Montreal, and Vancouver, while the Airbus A350‑900 and A380‑800 also appear on flights via New York JFK. The shorter domestic or trans‑border segments are operated by a mix of regional jets and narrow‑body aircraft, including the Embraer 175, Canadair Regional Jet 900, Boeing 737 MAX, and Airbus A220‑200.", "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 Seoul to Washington?", "answer": "Korean Air (SkyTeam) and Air Premia, which is unaffiliated with any major alliance, fly nonstop from Seoul Incheon to Washington Dulles. No Star Alliance or oneworld carrier operates this route nonstop, though they may offer connections.", "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 Seoul?", "answer": "Incheon Airport Terminal 1 has three Asiana Airlines Business Class lounges (East, Central, West) for Asiana business/first passengers and Star Alliance Gold members, plus several independent options: Matina Lounge (East near Gate 11, West near Gate 43), Sky Hub Lounge (East and West), and a Sky Hub Lounge in the Terminal 1 Concourse near Gate 115. Terminal 2 has a Matina Lounge and Sky Hub Lounges, accessible via Priority Pass or day pass. Asiana lounges offer Korean dishes and shower suites, while Sky Hub lounges feature complimentary Wi-Fi, drinks, and light meals. Access is typically through business class tickets, elite status, or paid entry.", "toolsUsed": [], "references": [{"url": "https://americanexpress.com/en-us/travel/lounges/the-platinum-card/ICN", "title": "American Express Lounges at Seoul Incheon International Airport | Amex US", "favicon": "https://www.americanexpress.com/apple-touch-icon-152x152.png"}, {"url": "https://my.prioritypass.com/en-GB/lounges/south-korea/incheon-international", "title": "Incheon International Airport ICN Lounges - ICN Airport Guide and lounges. | Priority Pass", "time_published": "2024-11-05T00:00:00Z"}, {"url": "https://www.delta.com/us/en/airports/asia/seoul-sky-club-airport-map", "title": "Seoul Incheon (ICN) Airport Map & Lounges | Delta Air Lines", "time_published": "2023-01-01T00:00:00Z"}, {"url": "https://americanexpress.com/en-th/travel/lounges/the-platinum-card/ICN", "title": "American Express Lounges at Seoul Incheon International Airport | Amex TH", "time_published": "2026-05-03T00:00:00Z"}, {"url": "https://my.prioritypass.com:443/en-GB/lounges/south-korea/incheon-international/icn10-sky-hub-lounge", "title": "Sky Hub Lounge ICN AIRPORT Terminal 1 Concourse Seoul Incheon Intl | Priority Pass", "time_published": "2024-11-05T00:00:00Z"}]}, "q21": {"question": "What is the baggage allowance on this route from Seoul to Washington?", "answer": "On Seoul–Washington routes, Basic Economy may exclude checked baggage. Standard economy fares typically include one checked bag and a carry‑on, while premium cabins allow two or more checked bags and a carry‑on."}, "q22": {"question": "What cabin and seat options are typical from Seoul to Washington?", "answer": "Typical cabins include Economy, Premium Economy, and flat‑bed Business class, with First class available on select airlines."}, "q23": {"question": "Are same‑day changes or standby possible on this route?", "answer": "Same‑day change and standby eligibility depend on the airline and fare class; flexible and premium cabin tickets typically allow it, while restrictive economy fares usually do not."}}}}