{ "response": { "Key": "IAD-SEL", "orig": { "code": "IAD", "type": "airport", "city": "Washington", "fullCity": "Washington, United States", "airport": "Washington Intl Airport" }, "dest": { "code": "SEL", "type": "airport", "city": "Seoul", "fullCity": "Seoul, Korea", "airport": "Incheon Intl Airport" }, "faq": { "q0": { "question": "What is the typical flight duration from Washington to Seoul?", "answer": "A nonstop flight from Washington Dulles (IAD) to Seoul Incheon (ICN) typically takes about 14 hours 30 minutes to 15 hours. With one stop, common layovers such as San Francisco, Los Angeles, or Tokyo add several hours, making total travel time roughly 17 to 20 hours. The return flight from Seoul to Washington is often slightly faster, around 13 hours 30 minutes due to tailwinds." }, "q1": { "question": "Are there any direct flights from Washington to Seoul?", "answer": "Yes, Korean Air and Air Premia both fly nonstop from Washington Dulles to Seoul Incheon. Korean Air operates up to four daily flights, while Air Premia offers two flights a day on Mondays, Wednesdays, Fridays, and Sundays.", "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 Washington to Seoul?", "answer": "Yes, visa requirements apply for travel between Washington, D.C. and Seoul. U.S. citizens can visit South Korea for up to 90 days without a visa for tourism or business, but must have a valid K-ETA (Korea Electronic Travel Authorization) before departure. South Korean citizens traveling to the United States must hold a valid visa or, if eligible under the Visa Waiver Program, an approved ESTA authorization. Travelers of other nationalities should check both U.S. and South Korean entry requirements based on their citizenship." }, "q3": { "question": "What are the ground transportation options in Seoul?", "answer": "From Incheon International Airport (ICN) to Seoul, the fastest and most-used option is the AREX Airport Railroad express train, reaching Seoul Station in about 43 minutes for 8,000 won. The all-stop commuter train is a cheaper alternative at roughly 4,150 won. Airport limousine buses serve many city destinations, with fares around 17,000 won, and are convenient if you're near a bus stop. Taxis and ride-share services are available but pricier and subject to traffic. Car rentals are possible but not recommended for city-center travel due to congestion and parking difficulties.", "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" } ] }, "q4": { "question": "When is the cheapest time to fly from Washington to Seoul?", "answer": "The cheapest time to fly from Washington to Seoul is late summer through fall, with September offering the lowest average fares around $1154, followed by October and November. The most expensive months are early summer and the winter holidays, with June averaging $1691 and December $1621.", "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 Washington to Seoul?", "answer": "For the best fare from Washington to Seoul, book 7 to 10 weeks in advance, where prices average around $1,557. The lowest fares appear about 55–60 days before departure, while last‑minute bookings can cost over $1,800. Summer and holiday periods tend to push optimal booking earlier, so aim for the earlier side of that window during peak seasons.", "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 Washington to Seoul?", "answer": "There are no nonstop red-eye flights from Washington Dulles (IAD) to Seoul, but connecting itineraries whose long leg is an overnight red-eye are available. For example, United offers a connection via San Francisco where the overnight SFO–ICN leg departs at 11:55 PM and arrives at 4:20 AM, and Asiana has a similar SFO–ICN red-eye departing at 11:20 PM and arriving at 4:05 AM. Asiana also offers an overnight LAX–ICN leg departing at 11:00 PM and arriving at 4:00 AM, connecting via Los Angeles on Delta.", "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" ] }, "q8": { "question": "If I need a connection, what are common layover cities between Washington and Seoul?", "answer": "Common layover cities include Tokyo, Incheon, Beijing and Shanghai, each offering broad connections and efficient transfers. Tokyo and Incheon provide extensive onward flights to Seoul, while Beijing and Shanghai benefit from visa‑free transit policies, keeping total travel time competitive." }, "q9": { "question": "How reliable are on‑time departures on this route from Washington to Seoul?", "answer": "On-time departures are generally reliable, but afternoon storms at IAD can cause delays. Early flights on Korean Air and Asiana often depart on schedule." }, "q10": { "question": "Which months have the best weather for traveling to Seoul?", "answer": "April to June and September to October offer mild temperatures, low rainfall, and fewer tourists than summer." }, "q11": { "question": "What documents should I bring with me to the airport when flying from Washington to Seoul?", "answer": "Bring a passport valid for at least six months, any required visa or K-ETA 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 Seoul?", "answer": "Incheon is Seoul's main international airport, located about 48 km west of the city center, and serves as a hub for Korean Air and Asiana, offering extensive global connections. Gimpo is much closer to downtown, just 15 km away, but primarily handles domestic flights and a few short-haul international routes to China, Japan, and Taiwan, making it convenient for regional travel." }, "q13": { "question": "How do I get to Washington Intl Airport from the city center?", "answer": "From downtown Washington, D.C., the fastest and most popular way to reach Dulles International Airport (IAD) is the Metrorail Silver Line, which connects directly to the airport station; from there, a free pedestrian bridge or shuttle links to the terminal. Taxis and ride‑share services like Uber and Lyft offer door‑to‑door convenience at a higher cost, while shared‑van shuttles provide a middle‑ground option. Driving and parking are straightforward, with economy lots costing $15 per day and free shuttle service to the terminal. Public buses, including the Silver Line Express bus from Wiehle‑Reston East station, offer a budget‑friendly alternative at $5 each way.", "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" } ] }, "q14": { "question": "Are there hotels or sleeping facilities at Seoul airport?", "answer": "Seoul Incheon Airport has an on‑site transit hotel on the 4th floor of Terminal 1 (airside), bookable in 6‑hour blocks. Terminal 2 offers free rest zones with reclined loungers and armrest‑free benches landside on Level 1 and airside near gates 262–268, though no capsule hotel or sleeping pods are advertised. Nearby hotels like the ibis Styles Ambassador Incheon Airport are connected by a free shuttle.", "toolsUsed": [], "references": [ { "url": "https://www.sleepinginairports.net/guides/seoul-incheon-airport-guide.htm", "title": "Seoul Incheon Airport Guide (ICN) - 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": "2018-10-02T00:00:42Z" }, { "url": "https://www.walkerhill.com/transithotel/customer/FAQ", "title": "Incheon Airport Transit Hotel", "time_published": "2022-06-13T00:00:00Z" }, { "url": "http://www.sleepinginairports.net/asia/seoul.htm", "title": "Seoul Incheon Airport Guide (ICN) - Sleeping in Airports", "time_published": "2026-04-13T17:34:21Z" }, { "url": "https://www.walkerhill.com/transithotel/en/t1/about/Introduction.jsp", "title": "Incheon Airport Transit Hotel", "time_published": "2022-06-13T00:00:00Z" }, { "url": "https://all.accor.com/a/en/destination/city/hotels-seoul-v5556.html", "title": "Hotels in Seoul | Accor ALL.com", "time_published": "2025-01-20T00:00:00Z" }, { "url": "https://www.walkerhill.com/transithotel/m/en/t1/about/Introduction.jsp", "title": "Incheon Airport Transit Hotel", "time_published": "2022-06-13T00:00:00Z" } ] }, "q15": { "question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at Incheon Intl Airport?", "answer": "Incheon International Airport has currency exchange counters and ATMs located in the public areas of both Terminal 1 and Terminal 2 on the 3rd floor (departures) and 1st floor (arrivals), as well as within the duty-free zones. Prayer rooms are available airside in both terminals, with a multi-faith prayer room near Gate 11 in Terminal 1 and a prayer room near Gate 249 in Terminal 2. Free Wi‑Fi is provided throughout the airport; simply connect to the 'AirportWiFi' network without a password.", "toolsUsed": [], "references": [ { "url": "https://airport.kr/ap_en/1562/subview.do", "title": "International Incheon Airport" }, { "url": "https://airport.kr/ap_en/1542/subview.do", "title": "International Incheon Airport", "time_published": "1999-01-01T00:00:00Z" }, { "url": "https://en.wikipedia.org/wiki/Incheon%20International%20Airport", "title": "Incheon International Airport", "time_published": "2026-04-30T15:03:57Z" }, { "url": "https://en.wikipedia.org/wiki/File:Incheon_International_Airport_Interior.jpg", "time_published": "2013-06-13T00:00:00Z" }, { "url": "https://airport.kr/ap_en/1413/subview.do", "title": "International Incheon Airport" } ] }, "q17": { "question": "What aircraft are typically used on flights from Washington to Seoul?", "answer": "There is no nonstop service between Washington Dulles and Seoul, so all flights connect. The long-haul leg is most often operated by a Boeing 787-9, which appears on itineraries connecting through San Francisco, Dallas/Fort Worth, Toronto, Seattle, Taipei, and Istanbul on carriers like United, American, Air Canada, Alaska, EVA Air, and Turkish Airlines. Airbus A350-900 and Airbus A380-800 also appear regularly on connections through New York JFK, New York LaGuardia, San Francisco, and Los Angeles, primarily on Asiana Airlines, while a few itineraries use a Boeing 777-300ER or Boeing 777-200LR via Istanbul or Seattle. The exact aircraft can vary by day and airline, but the 787-9 and A350-900 are the most common widebody types on this route, and Wi‑Fi and seatback entertainment are widely available on these long‑haul segments.", "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 Washington to Seoul?", "answer": "Korean Air, a SkyTeam member, and Air Premia, which is unaffiliated with any major alliance, fly nonstop from Washington Dulles to Seoul Incheon. SkyTeam is the only alliance with a nonstop presence on this route; Star Alliance and oneworld do not operate nonstop service but may offer connecting options.", "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 Washington?", "answer": "At Washington Dulles, departing passengers have several solid lounge options. The Virgin Atlantic Clubhouse in Concourse A is a standout, open 6:00 AM–10:00 PM with a stylish bar, à la carte dining, and a pool table. Also in Concourse A, the Air France/KLM Lounge (7:30 AM–9:00 PM, though access is restricted 3:00–8:00 PM) offers a quieter space with complimentary drinks and snacks. In Concourse B, the Turkish Airlines Lounge (7:15 AM–9:30 PM) features freshly prepared Turkish dishes and a comfortable seating area. The Capital One Lounge, located pre-security near the TSA checkpoints, is open 5:30 AM–9:00 PM and provides a modern design with locally inspired food and grab-and-go options. Note that the Lufthansa Business and Senator Lounges in Concourse B are temporarily closed.", "toolsUsed": [], "references": [ { "url": "https://americanexpress.com/en-us/travel/lounges/the-platinum-card/IAD", "title": "American Express Lounges at Washington Dulles International Airport | Amex US", "time_published": "2026-01-01T00:00:00Z" }, { "url": "https://prioritypass.com/en-GB/lounges/united-states-of-america/washington-dulles-international", "title": "Washington Dulles International Airport IAD Lounges - IAD Airport Guide and lounges. | Priority Pass", "time_published": "2024-11-05T00:00:00Z" }, { "url": "https://americanexpress.com/en-th/travel/lounges/the-platinum-card/IAD", "title": "American Express Lounges at Washington Dulles International Airport | Amex TH", "time_published": "2026-01-01T00:00:00Z" }, { "url": "https://www.flydulles.com/travel-information/services-amenities/airport-lounges/capital-one-lounge-iad", "title": "Capital One Lounge - IAD | flydulles.com", "time_published": "2022-03-01T00:00:00Z" }, { "url": "https://my.prioritypass.com/zh-CN/lounges/united-states-of-america/washington-dulles-international/iad6-air-france-klm-lounge", "title": "Air France - KLM Lounge IAD AIRPORT A 大厅 杜勒斯国际机场 (Washington DC Dulles Intl) | Priority Pass", "time_published": "2024-11-05T00:00:00Z" } ] }, "q21": { "question": "What is the baggage allowance on this route from Washington to Seoul?", "answer": "Baggage rules vary by airline and fare class. Basic economy often excludes a free checked bag, while standard international economy usually includes one checked bag and a carry‑on. Premium classes offer additional allowances." }, "q22": { "question": "What cabin and seat options are typical from Washington to Seoul?", "answer": "Flights from Washington to Seoul typically offer Economy, Premium Economy on select airlines, and lie-flat Business class; First class is rare." }, "q23": { "question": "Are same‑day changes or standby possible on this route?", "answer": "Policies differ by airline and fare; flexible and premium cabin tickets often allow same‑day changes or standby, while basic economy typically does not." } } } }