{
  "response": {
    "Key": "ICN-IAD",
    "orig": {
      "code": "ICN",
      "type": "airport",
      "city": "Seoul",
      "fullCity": "Seoul, Korea",
      "airport": "Incheon Intl Airport"
    },
    "dest": {
      "code": "IAD",
      "type": "airport",
      "city": "Washington D.C.",
      "fullCity": "Washington D.C., United States",
      "airport": "Washington Intl Airport"
    },
    "faq": {
      "q0": {
        "question": "What is the typical flight duration from Seoul to Washington D.C.?",
        "answer": "A nonstop flight from Seoul (ICN) to Washington D.C. (IAD) typically takes about 13 hours 30 minutes to 14 hours. The return flight from IAD to ICN is often slightly faster, averaging around 13 hours 15 minutes to 13 hours 45 minutes due to tailwinds. With one stop, common layovers include Tokyo (NRT), Beijing (PEK), or San Francisco (SFO), extending total travel time to 16–20 hours depending on connection duration. Korean Air and Asiana Airlines offer the fastest nonstop service."
      },
      "q1": {
        "question": "Are there any direct flights from Seoul to Washington D.C.?",
        "answer": "Yes, Korean Air (KE) and Air Premia (YP) both fly non‑stop from Seoul Incheon (ICN) to Washington Dulles (IAD). Korean Air runs twice daily, every day, while Air Premia operates once daily 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. 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 Seoul to Washington D.C.?",
        "answer": "Yes, visa requirements apply for travel from Seoul to Washington D.C. U.S. citizens do not need a visa to enter the U.S. South Korean nationals can travel under the Visa Waiver Program for short stays (up to 90 days) but must have an approved ESTA authorization before departure. Nationals of other countries may need a visa depending on their citizenship. For travel from Washington D.C. to Seoul, U.S. citizens can enter South Korea visa-free for up to 90 days under the K-ETA program (effective September 2021, with temporary exemptions for certain nationalities through 2024; check current status). Other nationalities should verify South Korean entry requirements based on their passport."
      },
      "q3": {
        "question": "What are the ground transportation options in Washington D.C.?",
        "answer": "From Washington Dulles International Airport (IAD), the Silver Line Express bus connects to the Wiehle-Reston East Metro station in about fifteen minutes, from which the Silver Line Metro reaches downtown D.C. in forty to fifty minutes. The new Silver Line extension now provides direct Metro service from the airport to the city center, taking approximately fifty to sixty minutes, making it the most used and cost-effective option. Taxis and ride-share services are available at the curb and take forty to sixty minutes depending on traffic but are more expensive. Car rentals are offered but are generally unnecessary for city travel and parking is limited. Shared-ride vans provide a slower door-to-door alternative. For most travelers, the Metro is the best balance of convenience and affordability."
      },
      "q4": {
        "question": "When is the cheapest time to fly from Seoul to Washington D.C.?",
        "answer": "The cheapest months to fly from Seoul to Washington D.C. are September, October, and August, with average round-trip prices as low as $1,229 in September. The most expensive months are December, June, and July, with December fares averaging $1,847.",
        "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.",
        "relevant": true,
        "toolsUsed": [
          "seasonal_prices"
        ]
      },
      "q5": {
        "question": "How far in advance should I book tickets from Seoul to Washington D.C.?",
        "answer": "For flights from Seoul to Washington D.C., the optimal booking window is about 23 to 26 weeks before departure, with average fares around $1,578. The absolute cheapest day to book is around 180 days out at roughly $1,556, while last-minute bookings can cost around $1,781. During summer and holiday peaks, booking even earlier within that 5–6 month window is advisable to secure the best price.",
        "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.",
        "relevant": true,
        "toolsUsed": [
          "booking_timing"
        ]
      },
      "q6": {
        "question": "Are overnight (red‑eye) flights available from Seoul to Washington D.C.?",
        "answer": "There are no nonstop red-eye flights from Seoul (ICN) to Washington D.C. (IAD), but connecting overnight options do exist — for example, a Turkish Airlines flight departing ICN at 11:20 PM and arriving in Istanbul at 5:00 AM before connecting onward to IAD, or an Asiana Airlines overnight leg to JFK departing at 9:05 PM and arriving at 11:00 PM with a connection to IAD on American 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 Seoul to Washington D.C.?",
        "answer": "Korean Air and Air Premia operate nonstop flights from Seoul (ICN) to Washington D.C. (IAD). Korean Air flies twice daily, with a typical median fare around $1,868, while Air Premia offers four weekly flights with a median fare around $1,548.",
        "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.",
        "relevant": true,
        "toolsUsed": [
          "route_airlines"
        ]
      },
      "q8": {
        "question": "If I need a connection, what are common layover cities between Seoul and Washington D.C.?",
        "answer": "Common layover cities between Seoul and Washington D.C. include Tokyo (Narita or Haneda), which offers efficient transfers and frequent connections via Japanese or Korean carriers; San Francisco, a major U.S. gateway with streamlined customs for connecting passengers; Los Angeles, providing broad domestic connections and multiple daily flights; and Toronto, a convenient Canadian hub with U.S. pre-clearance that saves time upon arrival. These hubs keep overall travel times competitive."
      },
      "q9": {
        "question": "How reliable are on‑time departures on this route from Seoul to Washington D.C.?",
        "answer": "On-time performance is generally reliable, though afternoon and evening flights can be affected by air traffic or seasonal weather. Early morning departures, such as those operated by Korean Air, tend to have the best punctuality. Incheon Airport is known for efficient operations, which helps maintain schedule integrity."
      },
      "q10": {
        "question": "Which months have the best weather for traveling to Washington D.C.?",
        "answer": "April to May and September to October offer mild temperatures, cherry blossoms or fall foliage, and fewer tourists than summer."
      },
      "q11": {
        "question": "What documents should I bring with me to the airport when flying from Seoul to Washington D.C.?",
        "answer": "Bring a valid passport, a U.S. visa or ESTA authorization, proof of onward or return travel, a payment method for baggage, and any required vaccination certificates. Ensure your passport is valid for your entire stay, as the six-month rule does not apply for South Korean citizens entering the U.S."
      },
      "q12": {
        "question": "Which airport should I use in Washington D.C.?",
        "answer": "Dulles is the primary international gateway and is well connected to downtown. Reagan National is closer to the city centre but serves mainly domestic and limited international routes. Baltimore/Washington is farther away and often used by low-cost carriers."
      },
      "q13": {
        "question": "How do I get to Incheon Intl Airport from the city center?",
        "answer": "From Seoul city center to Incheon Airport, the AREX express train is fastest at 43–51 min and popular. Airport limousine buses offer door‑to‑door comfort for moderate cost. Taxis and rideshares are pricier, and driving with parking is possible but expensive."
      },
      "q14": {
        "question": "Are there hotels or sleeping facilities at Washington D.C. airport?",
        "answer": "Washington Dulles does not have on-site hotels or sleeping pods. Several nearby hotels are connected by free shuttle, including the Washington Dulles Airport Marriott, the Hyatt Regency Dulles, and the Westin Washington Dulles Airport. Shuttle pick-up is at Ground Transportation Level outside the terminal."
      },
      "q15": {
        "question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at Washington Intl Airport?",
        "answer": "Washington Dulles International Airport has currency exchange counters near baggage claim in the main terminal and in concourses, an interfaith chapel pre‑security in the main terminal, and free Wi‑Fi throughout the airport."
      },
      "q16": {
        "question": "Are there accessible services or children's facilities at the Seoul and Washington D.C. airports?",
        "answer": "Seoul Incheon provides wheelchair assistance, accessible restrooms, and a dedicated help desk; children’s play areas are located in both terminals. Washington Dulles offers mobility assistance from curb to gate, accessible facilities, and a children’s play area near Gate B70. Request services through your airline at least 48 hours before departure."
      },
      "q17": {
        "question": "What aircraft are typically used on flights from Seoul to Washington D.C.?",
        "answer": "There is no nonstop service between Seoul (ICN) and Washington Dulles (IAD), so all flights connect. On the long transpacific leg, the most common aircraft types are the Boeing 787-9 (via Dallas/Fort Worth, San Francisco, Toronto, or Abu Dhabi), the Airbus A350-900 (via New York JFK), and the Boeing 777 variants (via Istanbul, Seattle, or Doha), with occasional appearances by the Boeing 747 (via Beijing) and Airbus A380-800 (via Los Angeles or New York JFK). The exact aircraft can vary by day and airline; 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 Seoul to Washington D.C.?",
        "answer": "Korean Air (SkyTeam) and Air Premia (no alliance) are the carriers shown in the schedule data flying nonstop from Seoul Incheon to Washington Dulles. Other alliances like Star Alliance and oneworld may serve the route via connections, but no member of those alliances operates it nonstop.",
        "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.",
        "toolsUsed": [
          "route_airlines"
        ]
      },
      "q20": {
        "question": "What are the best airport lounge options when departing from Seoul?",
        "answer": "At Incheon Airport, Korean Air operates spacious KAL Lounges in both terminals for Prestige and First Class passengers and SkyTeam Elite Plus members, featuring showers and Korean cuisine. Asiana Airlines has Business and First Class lounges in Terminal 1, accessible with Star Alliance status or premium tickets. The Matina Lounge and Sky Hub Lounge accept Priority Pass and offer self-serve buffets and rest areas. The Singapore Airlines SilverKris Lounge in Terminal 1 is available to business class and PPS Club members."
      },
      "q21": {
        "question": "What is the baggage allowance on this route from Seoul to Washington D.C.?",
        "answer": "Baggage rules for Seoul to Washington D.C. depend on the airline and fare class. Basic economy tickets often exclude a free checked bag. Standard international economy usually includes one checked bag and a carry-on. Premium cabins provide more generous allowances."
      },
      "q22": {
        "question": "What cabin and seat options are typical from Seoul to Washington D.C.?",
        "answer": "Direct flights from Seoul to Washington D.C. usually offer Economy, flat‑bed Business, and sometimes Premium Economy, while First class is rarely available."
      },
      "q23": {
        "question": "Are same‑day changes or standby possible on this route?",
        "answer": "Policies vary by airline and fare; flexible and premium-cabin tickets usually allow same-day changes or standby, while basic economy fares generally do not."
      },
      "q24": {
        "question": "What are the cheapest days and times to fly from Seoul to Washington D.C.?",
        "answer": "The cheapest day to fly from Seoul (ICN) to Washington D.C. (IAD) is Wednesday, with an average fare around $1,633, while Saturday is the most expensive at about $1,792. The cheapest time of day to depart is the afternoon, with fares starting at $913, compared to the priciest early morning departures starting at $2,792.",
        "methodology": "The cheapest day of the week and time of day to depart are drawn from the same large sample of real fares Priceline users found on this route in the last 72 hours, grouped by the day of the week and by the time-of-day window of the outbound departure, with the lowest and average price reported for each.",
        "relevant": true,
        "toolsUsed": [
          "departure_timing"
        ]
      },
      "q25": {
        "question": "What is a good price for a flight from Seoul to Washington D.C.?",
        "answer": "On the Seoul to Washington D.C. route, a good price is anything under $1,296, which is considered a great deal, while the typical fare averages around $1,698.",
        "methodology": "The typical price, the lowest fare, a 'great deal' threshold, and how fares are spread across price bands are summarized from a large sample of the real fares Priceline users found on this route in the last 72 hours, with a small fraction of extreme outlier fares excluded from the range.",
        "relevant": true,
        "toolsUsed": [
          "price_context"
        ]
      }
    }
  }
}