{
  "response": {
    "Key": "IAD-ICN",
    "orig": {
      "code": "IAD",
      "type": "airport",
      "city": "Washington D.C.",
      "fullCity": "Washington D.C., United States",
      "airport": "Washington Intl Airport"
    },
    "dest": {
      "code": "ICN",
      "type": "airport",
      "city": "Seoul",
      "fullCity": "Seoul, Korea",
      "airport": "Incheon Intl Airport"
    },
    "faq": {
      "q0": {
        "question": "What is the typical flight duration from Washington D.C. to Seoul?",
        "answer": "A nonstop flight from Washington Dulles (IAD) to Seoul Incheon (ICN) typically takes about 14 hours 30 minutes westbound. The return flight is usually shorter, around 13 hours 10 minutes eastbound, due to prevailing winds. With a layover, total travel time often ranges from 16 to 20 hours, depending on the connection city; common layover points include Tokyo (Narita), San Francisco, or Dallas/Fort Worth. Korean Air and Asiana offer nonstop service with similar durations, while United also operates a nonstop flight with comparable timing."
      },
      "q1": {
        "question": "Are there any direct flights from Washington D.C. to Seoul?",
        "answer": "Yes, there are nonstop flights from Washington Dulles (IAD) to Seoul Incheon (ICN) on two airlines: Korean Air (KE) operates daily with multiple departures, while Air Premia (YP) flies four days a week on Monday, Wednesday, Friday, and Sunday.",
        "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 Washington D.C. to Seoul?",
        "answer": "Yes, visa requirements apply for travel from Washington D.C. to Seoul. U.S. passport holders can visit South Korea without a visa for up to 90 days for tourism or business under the K-ETA program, but must apply for a K-ETA (Korea Electronic Travel Authorization) before departure. Travelers of other nationalities should check South Korean entry requirements based on their passport, as many countries have visa-free agreements while others require a visa in advance. If you are a South Korean national returning home, no visa is needed. Note that K-ETA is valid for two years and must be obtained online before travel."
      },
      "q3": {
        "question": "What are the ground transportation options in Seoul?",
        "answer": "Seoul’s Incheon International Airport is linked to the city center by several efficient options. The AREX Express train reaches Seoul Station in about forty-three minutes, while the All-Stop train takes around sixty minutes; both are reliable and widely used. Limousine buses serve major hotels and districts, taking sixty to ninety minutes depending on traffic. Taxis are available but can be expensive and slower during peak hours, with international taxis offering English-speaking drivers. Ride-share apps like Kakao T are popular and convenient. Car rentals are possible but not recommended for city travel due to heavy traffic and limited parking. Most travelers use the AREX trains or limousine buses for their balance of speed, comfort, and cost."
      },
      "q4": {
        "question": "When is the cheapest time to fly from Washington D.C. to Seoul?",
        "answer": "Based on seasonal price data for flights from Washington D.C. (IAD) to Seoul (ICN), the cheapest months to fly are September (around $1,229), October ($1,334), and August ($1,354), while the most expensive are December ($1,847), June ($1,702), and July ($1,612).",
        "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 D.C. to Seoul?",
        "answer": "For the best fare from Washington D.C. (IAD) to Seoul (ICN), aim to book roughly 23 to 26 weeks (about 5.5 to 6 months) in advance, with average prices around $1,578 during that window. The absolute lowest fare appears around 180 days before departure at $1,556, while last-minute bookings (0–5 days out) can climb above $1,750. During peak summer (June–August) and major holiday periods like Korean Thanksgiving (Chuseok) or Lunar New Year, demand often pushes optimal booking windows slightly earlier—consider 6–7 months ahead to secure better rates.",
        "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 D.C. to Seoul?",
        "answer": "There are no nonstop red-eye flights from Washington Dulles (IAD) to Seoul Incheon (ICN). However, connecting red-eye options exist where the long-haul leg is an overnight flight — for example, via San Francisco on United departing around 11:55 PM and arriving in Seoul around 4:20 AM, or via Los Angeles on Asiana departing around 11:00 PM and arriving around 4:00 AM.",
        "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 Washington D.C. to Seoul?",
        "answer": "Nonstop flights from Washington D.C. (IAD) to Seoul (ICN) are operated by Korean Air and Air Premia, according to schedule data. Korean Air offers multiple daily departures with a typical fare around $2,088, while Air Premia operates four days a week (Mon/Wed/Fri/Sun) with fares not reported in the data. Other airlines may also serve this route via connections, but Korean Air and Air Premia are the only nonstop carriers shown.",
        "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 Washington D.C. and Seoul?",
        "answer": "Common layovers include Tokyo (Narita or Haneda), Incheon (as a double‑connection via a U.S. West Coast gateway like Los Angeles or San Francisco), and Doha or Dubai, though the latter can lengthen total travel time. Tokyo offers efficient transfers and avoids backtracking, while Middle Eastern hubs provide broad connections and visa‑free transit for many nationalities."
      },
      "q9": {
        "question": "How reliable are on‑time departures on this route from Washington D.C. to Seoul?",
        "answer": "On‑time performance is typically good, though afternoon and evening flights can encounter delays due to congestion or weather. Early morning departures, particularly on Korean Air, often have the best punctuality. Washington Dulles Airport is known for occasional weather‑related disruptions, so booking the first flight of the day improves your odds."
      },
      "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 D.C. to Seoul?",
        "answer": "Bring a passport valid for at least six months, a K-ETA or visa if required, proof of onward or return travel, a payment method for baggage, and any necessary vaccination certificates or health documents."
      },
      "q12": {
        "question": "Which airport should I use in Seoul?",
        "answer": "Incheon International Airport is the primary gateway for international flights, located about 48 km west of central Seoul. It serves as a hub for Korean Air and Asiana Airlines, both in SkyTeam and Star Alliance respectively, and offers extensive global connections. Gimpo International Airport is much closer to downtown, roughly 15 km away, but handles mainly domestic routes and a few short-haul international flights to China and Japan. For your route, Incheon is the only practical choice."
      },
      "q13": {
        "question": "How do I get to Washington Intl Airport from the city center?",
        "answer": "From downtown DC to Dulles, the Silver Line Metro takes roughly 1 hour and is the cheapest option. Rideshares and taxis are faster, about 35–45 min, but cost more. Shuttle buses and parking are also available."
      },
      "q14": {
        "question": "Are there hotels or sleeping facilities at Seoul airport?",
        "answer": "Yes, Incheon International Airport has an on-site transit hotel within the security area of Terminal 1 and Terminal 2, plus the Darakhyu capsule hotel in both terminals, all accessible without leaving the airport. Nearby hotels like Grand Hyatt Incheon offer free shuttle service."
      },
      "q15": {
        "question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at Incheon Intl Airport?",
        "answer": "Incheon International Airport provides currency exchange counters in both terminals, multi-faith prayer rooms in Terminal 1 and Terminal 2, and free unlimited Wi‑Fi throughout the airport."
      },
      "q16": {
        "question": "Are there accessible services or children's facilities at the Washington D.C. and Seoul airports?",
        "answer": "Washington Dulles provides wheelchair assistance and accessible restrooms; request help through your airline 48 hours before departure. A children's play area is near Gate B72. Seoul Incheon offers free wheelchair and electric cart services, accessible elevators and restrooms, and multiple indoor play zones for kids. Pre-arrange mobility assistance by contacting your airline in advance."
      },
      "q17": {
        "question": "What aircraft are typically used on flights from Washington D.C. to Seoul?",
        "answer": "There is no nonstop service between Washington D.C. (IAD) and Seoul (ICN), so connecting itineraries are typical. The most common long-haul aircraft on these one-stop routes are the Boeing 787-9 (via Toronto, Dallas, San Francisco, Vancouver, or Taipei), Airbus A350-900 (via New York or Los Angeles), and Airbus A380-800 (via New York). Short connecting legs within North America often use regional jets like the Embraer 175 or Canadair Regional Jet 900.",
        "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 D.C. to Seoul?",
        "answer": "Korean Air, a SkyTeam member, and Air Premia, an independent carrier with no global alliance, are the airlines shown in the schedule data for nonstop service from Washington Dulles (IAD) to Seoul Incheon (ICN). SkyTeam is therefore the only alliance with a nonstop presence on this route, though other alliances may serve it via connecting itineraries.",
        "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 Washington D.C.?",
        "answer": "At Washington Dulles, the Turkish Airlines Lounge in Concourse B is accessible via Priority Pass and offers hot meals and showers. United Polaris Lounge in Concourse C serves United business‑class and Star Alliance first‑ and business‑class passengers with sit‑down dining and sleep rooms. The Air France‑KLM Lounge in Concourse A admits business‑class travellers and Priority Pass holders during certain hours. Virgin Atlantic Clubhouse in Concourse A provides table service and a cocktail bar for Upper Class and Flying Club Gold members."
      },
      "q21": {
        "question": "What is the baggage allowance on this route from Washington D.C. to Seoul?",
        "answer": "Baggage allowance on the Washington D.C. (IAD) to Seoul (ICN) route depends on the airline and fare class. Basic economy tickets are restrictive and may not include a checked bag. Standard international economy fares typically include one checked bag (up to 23 kg) and a carry-on bag plus a personal item. Premium economy and business class allow additional checked bags with higher weight limits. Always verify with your specific airline before travel."
      },
      "q22": {
        "question": "What cabin and seat options are typical from Washington D.C. to Seoul?",
        "answer": "Flights from Washington D.C. to Seoul typically feature Economy and flat‑bed Business class. Premium Economy is offered by select carriers. First class is uncommon."
      },
      "q23": {
        "question": "Are same‑day changes or standby possible on this route?",
        "answer": "Policies vary by airline and fare; flexible and higher cabins may permit same‑day changes or standby, while restrictive economy fares generally do not."
      },
      "q24": {
        "question": "What are the cheapest days and times to fly from Washington D.C. to Seoul?",
        "answer": "The cheapest day to fly from Washington D.C. to Seoul is Monday (average $1,901), while Saturday is the most expensive (average $2,049). For departure time, Late Night offers the lowest minimum fare at $1,024, in contrast to Morning which starts at $1,250.",
        "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 Washington D.C. to Seoul?",
        "answer": "A great deal on a flight from Washington D.C. to Seoul is anything under $1,392, while the typical price runs around $1,946.",
        "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"
        ]
      }
    }
  }
}