{ "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": "A nonstop flight from Seoul (ICN) to Washington Dulles (IAD) typically takes about 13 hours 40 minutes to 14 hours eastbound and around 14 hours 30 minutes to 15 hours westbound. With one stop, total travel time often ranges from 16 to 20 hours depending on the layover city." }, "q2": { "question": "Are there visa requirements to travel from Seoul to Washington?", "answer": "Yes, visa or travel authorization requirements apply for travel from Seoul to Washington depending on your nationality. If you are a South Korean national, you can enter the United States for tourism or business for up to 90 days without a visa under the Visa Waiver Program, but you must obtain an approved ESTA prior to travel. If you are a U.S. citizen, you do not need a visa to enter the United States. For other nationalities, a valid U.S. visa or ESTA may be required. For the return journey from Washington to Seoul, U.S. citizens can enter South Korea without a visa for stays up to 90 days under the K-ETA program (currently exempted for 22 countries including the U.S. through December 31, 2025), while South Korean nationals do not need a visa to return home. Other nationalities should check South Korean entry requirements." }, "q3": { "question": "What are the ground transportation options in Washington?", "answer": "Arriving at Reagan National (DCA) — the closest airport to downtown Washington — the Metrorail's Blue and Yellow Lines offer the fastest and most-used connection, with a station connected directly to Terminal 2. Taxis and ride‑share services like Uber and Lyft are also readily available curbside. On‑airport car rental counters are located in Terminal Garage 1. Shared vans provide another option, though Metrorail remains the most efficient way to reach the city center.", "toolsUsed": [], "references": [ { "url": "https://www.flyreagan.com/dca/reagan-national-frequently-asked-questions", "title": "flyreagan.com - Reagan National Frequently Asked Questions", "favicon": "https://www.flyreagan.com/themes/custom/mwaa_barrio/favicon.ico" }, { "url": "https://www.flyreagan.com/", "title": "Official Website of Ronald Reagan Washington National Airport - DCA", "favicon": "https://www.flyreagan.com/themes/custom/mwaa_barrio/favicon.ico", "time_published": "2026-06-16T00:00:00Z" }, { "url": "https://en.wikipedia.org/wiki/Ronald%20Reagan%20Washington%20National%20Airport", "title": "Ronald Reagan Washington National Airport", "time_published": "2026-04-22T18:33:09Z" }, { "url": "https://en.wikipedia.org/wiki/Ronald%20Reagan%20Washington%20National%20Airport%20station", "title": "Ronald Reagan Washington National Airport station", "time_published": "2026-04-07T00:26:26Z" }, { "url": "https://www.mwaa.com/ipw-2017-archived", "title": "IPW 2017 - Archived", "time_published": "2021-02-01T00:00:00Z" } ] }, "q4": { "question": "When is the cheapest time to fly from Seoul to Washington?", "answer": "The cheapest months to fly from Seoul to Washington are September, October, and November, with average fares around $1,154 to $1,240. The most expensive months are June, December, and May, where prices climb to about $1,557 to $1,691.", "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 to 10 weeks before departure, with an average price around $1,557. Booking too close to the travel date can push prices up to $1,820, while the cheapest single-day fare appears about 60 days out at $1,547. Summer and holiday periods may see higher demand, so aiming for the early end of that window or slightly earlier is advisable.", "methodology": "This booking-window guidance is built from the same real flight prices found by Priceline users searching this route, re-grouped by how many days before departure each price was seen (from the departure day out to about 180 days ahead) across the route's price history. At each booking lead time we report the 25th-percentile price — the cheaper end of what travelers were quoted, rather than the rock-bottom minimum (which can be a fluke) or the average (which is pulled up by expensive last-minute fares). The buy-or-wait advice then applies a risk premium that grows as departure approaches, since seat availability shrinks and prices become less predictable; using that adjusted curve we flag windows where waiting is likely to save a meaningful amount (at least $20 or 5%) versus windows where booking now is the better call. Isolated single-day recommendations are filtered out, so the advice only reflects a window that holds for several days in a row. For this route, fares for the requested travel direction were unavailable, so the pattern shown is derived from the reverse direction, which shares the same seasonal demand cycle.", "toolsUsed": [ "booking_timing" ] }, "q6": { "question": "Are overnight (red‑eye) flights available from Seoul to Washington?", "answer": "No overnight red‑eye flights operate from Seoul Incheon to Washington, D.C. — neither nonstop nor connecting itineraries with a red‑eye long leg are available 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 Seoul to Washington?", "answer": "Korean Air and Air Premia both fly non‑stop from Seoul‑Incheon to Washington‑Dulles. Korean Air operates twice‑daily, with 14 weekly flights, while Air Premia flies four times a week on Monday, Wednesday, Friday, and Sunday. No per‑carrier fare estimates are 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": "If non‑stop times don’t suit, popular layovers include Tokyo (Narita or Haneda), Seoul (Incheon) for a double connection, Vancouver, and Toronto, keeping total travel times competitive." }, "q9": { "question": "How reliable are on‑time departures on this route from Seoul to Washington?", "answer": "On-time performance is generally good, but afternoon storms and air traffic can cause delays. Early morning flights, particularly on Korean Air and Asiana, tend to be more punctual." }, "q10": { "question": "Which months have the best weather for traveling to Washington?", "answer": "April to May and September to October offer pleasant temperatures and fewer tourists." }, "q11": { "question": "What documents should I bring with me to the airport when flying from Seoul to Washington?", "answer": "Bring a valid passport, a U.S. visa or ESTA authorization, proof of onward travel, a payment method for baggage, and any required vaccination certificates." }, "q12": { "question": "Which airport should I use in Washington?", "answer": "Washington Dulles is the main international gateway, located 26 miles west of downtown, and serves as a hub for United Airlines. Ronald Reagan Washington National is closest to the city centre, just across the Potomac River, ideal for domestic and short-haul flights, and is a focus city for American Airlines. Baltimore/Washington International is farther north, about 30 miles from downtown, and offers a mix of domestic and international flights, often with lower fares on Southwest Airlines." }, "q13": { "question": "How do I get to Incheon Intl Airport from the city center?", "answer": "From downtown Seoul, the fastest and most popular option is the AREX express train, which whisks you directly to Incheon Airport in about 43 minutes. Airport limousine buses are a comfortable alternative, picking up at major hotels and districts like Gangnam or Myeongdong for around 17,000 won, though they take over an hour. Taxis and ride-shares offer door-to-door convenience but are pricier and subject to traffic, while driving yourself is possible with both short-term and long-term parking available at the airport.", "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 Reagan National Airport (DCA) does not have on-site hotels, capsule hotels, or sleeping pods. Several nearby hotels, such as the Courtyard Arlington Crystal City/Reagan National Airport and the Crystal City Marriott at Reagan National Airport, offer free shuttle service to and from the airport. These hotels are located just a short 5-minute trip away, providing convenient accommodation for travelers.", "toolsUsed": [], "references": [ { "url": "https://sleepinginairports.net/guides/washington-reagan-airport-guide.htm", "title": "Washington Reagan Airport Guide (DCA) - Sleeping in Airports", "time_published": "2026-01-07T21:56:17Z" }, { "url": "https://en.wikipedia.org/wiki/Ronald%20Reagan%20Washington%20National%20Airport", "title": "Ronald Reagan Washington National Airport", "time_published": "2026-04-22T18:33:09Z" }, { "url": "https://www.marriott.com/en-us/hotels/wasct-courtyard-arlington-crystal-city-reagan-national-airport/overview/?scid=c8e19450-b70a-44de-ba50-f6796678f6bd&gclid=2554f3676e9a11acae559090d043903a&gclsrc=3p.ds", "title": "Ronald Reagan Airport Hotel | Courtyard Arlington Crystal City/Reagan National", "time_published": "2024-10-11T00:00:00Z" }, { "url": "http://activities.marriott.com/north-america/usa/washington-dc/activities/private_airport_transfer_from_ronald_reagan_dca_to_washington_dc-XJEGKV?property=WASRL", "title": "Private Airport Transfer from Ronald Reagan DCA to Washington DC", "time_published": "2026-04-10T00:00:00Z" }, { "url": "https://www.sleepinginairports.net/sleep-guide/sleeping-in-washington-reagan-airport.htm", "title": "Sleeping in Washington Reagan Airport", "time_published": "2024-10-04T00:00:00Z" }, { "url": "https://www.marriott.com/en-us/hotels/wascc-crystal-city-marriott-at-reagan-national-airport/overview/?EM=DNM_CRYSTALCITYMARRIOTTREUNIONS.COM", "title": "Hotels Near Ronald Reagan Airport | Crystal City Marriott", "time_published": "2024-10-11T00:00:00Z" } ] }, "q15": { "question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at Ronald Reagan National Airport?", "answer": "Ronald Reagan Washington National Airport offers free Wi‑Fi throughout the terminals. An interfaith chapel is available for prayer and meditation, though its exact terminal location is not specified in the airport’s services listing. Currency exchange offices are not mentioned among the airport’s listed services and amenities, and no information about them appears in the available data.", "toolsUsed": [], "references": [ { "url": "https://flyreagan.com/about-reagan-national-airport", "title": "flyreagan.com - About Reagan National Airport", "time_published": "2022-03-01T00:00:00Z" }, { "url": "https://www.flyreagan.com/", "title": "Official Website of Ronald Reagan Washington National Airport - DCA", "favicon": "https://www.flyreagan.com/themes/custom/mwaa_barrio/favicon.ico", "time_published": "2026-06-16T00:00:00Z" }, { "url": "https://en.wikipedia.org/wiki/Ronald%20Reagan%20Washington%20National%20Airport", "title": "Ronald Reagan Washington National Airport", "time_published": "2026-04-22T18:33:09Z" }, { "url": "https://en.wikipedia.org/wiki/Ronald%20Reagan%20Washington%20National%20Airport%20station", "title": "Ronald Reagan Washington National Airport station", "time_published": "2026-04-07T00:26:26Z" }, { "url": "https://www.mwaa.com/policefireems/fire-ems/fire-ems-ronald-reagan-washington-national-airport", "title": "mwaa.com - Fire & EMS at Ronald Reagan Washington National Airport", "favicon": "https://www.mwaa.com/themes/custom/mwaa_barrio/favicon.ico", "time_published": "2023-07-01T00:00:00Z" } ] }, "q17": { "question": "What aircraft are typically used on flights from Seoul to Washington?", "answer": "There is no nonstop service between Seoul (ICN) and Washington (WAS), so all flights connect. The most common long-haul aircraft on this route is the Boeing 787-9, operated by United, American, Air Canada, and others via hubs like San Francisco, Toronto, and Dallas/Fort Worth. The Airbus A350-900 also appears regularly (Asiana via SFO and LAX), and the Boeing 777 and 777-300ER show up on Qatar Airways and United itineraries through Doha and Tokyo Haneda. The exact aircraft can vary by day and airline, and on most of these long-haul jets you can expect Wi‑Fi and seatback entertainment to be widely available.", "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": "Nonstop flights from Seoul Incheon to Washington Dulles are operated by Korean Air (SkyTeam) and Air Premia, which is unaffiliated with any global alliance. SkyTeam is the only alliance with nonstop service on this route; Star Alliance and oneworld carriers may serve it via 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": "At Seoul Incheon (ICN) Terminal 1, Asiana Airlines operates three Business Class Lounges (East, Central, and West), available to Asiana business/first class passengers and Star Alliance Gold members, with complimentary Korean dishes and shower suites. Delta Air Lines and partner Korean Air operate from Terminal 2, where Delta Sky Club access is available to Delta One passengers, SkyTeam Elite Plus members, and eligible American Express cardholders, featuring a full bar and hot buffet. Terminal 2 also houses a MATINA Lounge (accessible via Priority Pass, DragonPass, and day pass) and multiple Sky Hub Lounges (Priority Pass, LoungeKey, and day pass), offering hot meals, showers, and runway views.", "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": "Baggage rules depend on the airline and fare class. Basic economy tickets often exclude checked luggage. Standard international economy usually includes one checked bag and a carry-on, while premium cabins offer more generous allowances." }, "q22": { "question": "What cabin and seat options are typical from Seoul to Washington?", "answer": "Typical cabin options include Economy, Premium Economy on select airlines, and flat‑bed Business class." }, "q23": { "question": "Are same‑day changes or standby possible on this route?", "answer": "Policies vary by airline and fare; flexible and premium cabin tickets often allow same‑day changes or standby, while basic economy typically does not." } } } }