{
  "response": {
    "Key": "ICN-SFO",
    "orig": {
      "code": "ICN",
      "type": "airport",
      "city": "Seoul",
      "fullCity": "Seoul, Korea",
      "airport": "Incheon Intl Airport"
    },
    "dest": {
      "code": "SFO",
      "type": "airport",
      "city": "San Francisco",
      "fullCity": "San Francisco, California",
      "airport": "San Francisco Intl Airport"
    },
    "faq": {
      "q0": {
        "question": "What is the typical flight duration from Seoul to San Francisco?",
        "answer": "A direct flight from Seoul Incheon (ICN) to San Francisco (SFO) typically takes about 10 hours 30 minutes to 11 hours. The return flight from San Francisco to Seoul is usually longer, around 12 to 13 hours, mainly due to prevailing winds. Nonstop flights are offered by airlines like Korean Air, Asiana, and United. With one stop, common layovers include Tokyo, Los Angeles, or Vancouver, extending total travel time to roughly 15 to 18 hours or more depending on connection length."
      },
      "q1": {
        "question": "Are there any direct flights from Seoul to San Francisco?",
        "answer": "Yes, there are direct non‑stop flights from Seoul (ICN) to San Francisco (SFO). Four airlines operate the route: United (UA) and Korean Air (KE) each fly daily, Asiana (OZ) flies daily, and Air Premia (YP) flies five days a week (Monday, Wednesday, Friday, Saturday, 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 Seoul to San Francisco?",
        "answer": "Yes, there are visa requirements for travel from Seoul to San Francisco. If you are a South Korean national, you may be eligible for the Visa Waiver Program (VWP), which allows visits to the U.S. for tourism or business for up to 90 days without a visa, provided you have a valid Electronic System for Travel Authorization (ESTA) approval. If you are a U.S. citizen, you do not need a visa to enter the U.S. but must present a valid U.S. passport. For nationals of other countries, a visa or ESTA may be required depending on your citizenship. Always check the latest entry requirements before travel."
      },
      "q3": {
        "question": "What are the ground transportation options in San Francisco?",
        "answer": "San Francisco International Airport (SFO) offers several ground transportation options to the city center. The Bay Area Rapid Transit (BART) system provides a fast and affordable connection, reaching downtown stations in about thirty minutes. It is the most used option due to its reliability and cost-effectiveness, though it has limited late-night service. Taxis and ride-share services like Uber and Lyft are readily available, offering door-to-door convenience with a typical travel time of twenty-five to forty minutes depending on traffic, at a higher cost. SamTrans buses serve the airport but are slower and less convenient for direct city access. Car rentals are widely available but parking in San Francisco is expensive and limited, making them impractical for city exploration. The AirTrain connects all terminals to the BART station and rental car center."
      },
      "q4": {
        "question": "When is the cheapest time to fly from Seoul to San Francisco?",
        "answer": "According to seasonal price data, the cheapest months to fly from Seoul to San Francisco are September, August, and October, with average fares around $773, $789, and $796 respectively. The most expensive months are December, June, and January, with average fares around $1,154, $1,151, and $1,005.",
        "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 San Francisco?",
        "answer": "For the Seoul to San Francisco route, the optimal booking window is around 6 to 9 weeks before departure, with average fares around $1065 and the lowest prices appearing about 50 days out. During peak summer and holiday periods, demand spikes can push ideal booking earlier, so aim for the earlier end of that range or slightly beyond to secure better availability and pricing.",
        "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 San Francisco?",
        "answer": "No overnight (red-eye) flights are available from Seoul (ICN) to San Francisco (SFO) — the schedule data shows no nonstop red-eyes on this route and no connecting itineraries with a red-eye long leg.",
        "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 San Francisco?",
        "answer": "Nonstop service from Seoul Incheon to San Francisco is available on United Airlines, Asiana Airlines, Air Premia, and Korean Air. Typical median fares for these nonstop carriers are around $1,084 on United, $1,514 on Asiana, $1,027 on Air Premia, and $1,385 on Korean Air. Flights operate daily on most carriers, with United offering up to 35 weekly flights and Air Premia flying on select days.",
        "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 San Francisco?",
        "answer": "Common layover cities include Tokyo (Narita or Haneda), Taipei, and Vancouver. Tokyo offers efficient connections and minimal detour; Taipei provides competitive pricing and good transit services; Vancouver allows U.S. preclearance, saving time upon arrival in San Francisco."
      },
      "q9": {
        "question": "How reliable are on‑time departures on this route from Seoul to San Francisco?",
        "answer": "On‑time performance is generally good, though afternoon and evening flights can face delays due to air traffic or weather. Morning departures, particularly on Korean Air and Asiana Airlines, tend to be more punctual. Incheon Airport itself has a strong record for on‑time departures."
      },
      "q10": {
        "question": "Which months have the best weather for traveling to San Francisco?",
        "answer": "September to November offers the warmest, sunniest weather and fewer tourists than summer."
      },
      "q11": {
        "question": "What documents should I bring with me to the airport when flying from Seoul to San Francisco?",
        "answer": "Bring a passport valid for at least six months beyond your stay, a valid U.S. visa or ESTA authorization, proof of onward or return travel, a payment method for baggage, and any required vaccination certificates."
      },
      "q12": {
        "question": "Which airport should I use in San Francisco?",
        "answer": "San Francisco International is the primary airport for the city, located about 13 miles south of downtown. It serves as a major hub for United Airlines and Alaska Airlines, with extensive domestic and international connections across all major alliances. For regional flights and low-cost carriers like Southwest, Oakland International across the bay is an alternative, though farther from San Francisco proper. San Jose International serves Silicon Valley and is less convenient for central San Francisco destinations."
      },
      "q13": {
        "question": "How do I get to Incheon Intl Airport from the city center?",
        "answer": "From central Seoul to Incheon Airport, the AREX Express train takes about 43 minutes nonstop and is the fastest option, while the All-Stop train is cheaper but slower. Airport limousine buses serve major hotels and neighborhoods with comfortable seats and luggage storage. Taxis and ride-shares offer door-to-door convenience but are the most expensive and subject to traffic. Driving and parking is possible but costly for long trips. The AREX Express is the most popular for its speed and reliability."
      },
      "q14": {
        "question": "Are there hotels or sleeping facilities at San Francisco airport?",
        "answer": "No on-site hotels or sleeping pods exist at SFO. The Grand Hyatt at SFO is connected to the terminals via the AirTrain people mover, and several nearby hotels offer free shuttles from the airport."
      },
      "q15": {
        "question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at San Francisco Intl Airport?",
        "answer": "San Francisco International Airport offers currency exchange at ICE booths in the International Terminal and Terminal 3, a meditation room in Terminal 2 post‑security, and free Wi‑Fi throughout all terminals."
      },
      "q16": {
        "question": "Are there accessible services or children's facilities at the Seoul and San Francisco airports?",
        "answer": "Seoul Incheon offers wheelchair assistance, accessible restrooms, and dedicated Kids Zone play areas in Terminals 1 and 2; request help via your airline 48 hours in advance. San Francisco International provides mobility assistance, the SFO Unites disability inclusion program, and children’s play areas in Terminals 2 and 3, plus a nursing room in the International Terminal."
      },
      "q17": {
        "question": "What aircraft are typically used on flights from Seoul to San Francisco?",
        "answer": "The most common aircraft on nonstop flights between Seoul (ICN) and San Francisco (SFO) is the Boeing 787-9, operated by United Airlines. On connecting itineraries, you'll frequently see the Boeing 777-300ER, Boeing 787-9, and Boeing 777-300 on the long-haul leg via hubs like Vancouver, Hong Kong, Taipei, or Tokyo, though the exact aircraft can vary by day and airline. In general, Wi-Fi and seatback entertainment are widely available on these long-haul routes.",
        "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 San Francisco?",
        "answer": "Star Alliance (via United and Asiana) and SkyTeam (via Korean Air) serve nonstop flights from Seoul Incheon to San Francisco, while Air Premia also flies the route but belongs to no global alliance.",
        "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, Korean Air operates KAL Prestige Class lounges in both Terminal 1 and Terminal 2 with showers, dining and nap rooms for business‑class and elite passengers. Asiana Airlines has Business Class Lounges in Terminal 1 with similar amenities. The Matina Lounge in Terminal 1 and the Sky Hub Lounge in both terminals accept Priority Pass and offer day passes, providing hot meals and rest areas."
      },
      "q21": {
        "question": "What is the baggage allowance on this route from Seoul to San Francisco?",
        "answer": "Baggage rules on Seoul–San Francisco flights depend on the airline and fare. Basic economy often excludes a checked bag. Standard international economy typically includes one checked bag and a carry‑on. Premium cabins offer larger allowances."
      },
      "q22": {
        "question": "What cabin and seat options are typical from Seoul to San Francisco?",
        "answer": "Typical cabins on this route include Economy, flat-bed Business, and often Premium Economy, with First Class available on select airlines."
      },
      "q23": {
        "question": "Are same‑day changes or standby possible on this route?",
        "answer": "Policies vary by airline and fare; flexible and higher cabin tickets often allow same‑day changes or standby, while Basic Economy and restricted fares usually do not."
      },
      "q24": {
        "question": "What are the cheapest days and times to fly from Seoul to San Francisco?",
        "answer": "Based on fare data, the cheapest day to fly from Seoul to San Francisco is Wednesday with an average fare of $1,387, while the most expensive day is Sunday at $1,475. The cheapest time of day to depart is the afternoon, with a minimum fare of $814, in contrast to late night departures which can cost up to $1,314 at minimum.",
        "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 San Francisco?",
        "answer": "A good price for a flight from Seoul to San Francisco is anything under $976, which is considered a great deal. The typical price for this route is around $1,428, with most fares falling between $1,000 and $1,600.",
        "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"
        ]
      }
    }
  }
}