{
  "response": {
    "Key": "DEL-SFO",
    "orig": {
      "code": "DEL",
      "type": "airport",
      "city": "Delhi",
      "fullCity": "Delhi, India",
      "airport": "Indira Gandhi 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 Delhi to San Francisco?",
        "answer": "A nonstop flight from Delhi (DEL) to San Francisco (SFO) typically takes about 15 hours 30 minutes to 16 hours. The return flight from SFO to DEL is usually longer, around 16 hours 30 minutes, due to prevailing winds. With one stop, common layover points include Dubai (DXB) or Doha (DOH), leading to total travel times of approximately 18 to 22 hours. Air India and United operate nonstop service, with Air India sometimes offering slightly shorter flight times."
      },
      "q1": {
        "question": "Are there any direct flights from Delhi to San Francisco?",
        "answer": "Yes, Air India flies non‑stop from Delhi (DEL) to San Francisco (SFO) with daily service — three flights a day, departing at 02:15, 05:00, and 10:50. Air India is the only carrier shown with non‑stop flights on this route in the schedule data.",
        "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 Delhi to San Francisco?",
        "answer": "Yes, if you are an Indian citizen traveling from Delhi to San Francisco you require a valid U.S. visa unless you hold a passport from a Visa Waiver Program country and have an approved ESTA. U.S. citizens do not need a visa for this route. Indian nationals must apply for a visa at a U.S. embassy or consulate before travel. Additionally, all travelers, including U.S. citizens, must comply with any COVID-19 testing or vaccination requirements in effect at the time of 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 BART rapid rail system is the most used option, providing a direct connection to downtown San Francisco in about thirty minutes for around ten dollars. Taxis are available at designated zones, with flat-rate fares to downtown costing approximately fifty-five dollars and taking thirty to forty-five minutes depending on traffic. Ride-share services like Uber and Lyft can be slightly cheaper than taxis and are easily accessed at the terminal curbs. Car rentals are widely available at the airport's rental car center but are generally not recommended for city travel due to limited parking and expense. SamTrans buses also serve the airport but are slower and less convenient than BART. Most travelers prefer BART for its speed, reliability, and affordability."
      },
      "q4": {
        "question": "When is the cheapest time to fly from Delhi to San Francisco?",
        "answer": "The cheapest months to fly from Delhi to San Francisco are March (around $859), September ($887), and April ($888), while the most expensive months are June ($1179), December ($1132), and July ($1110). The lowest fares generally appear in the low season (March, April, September, October), with peak prices in the high season (January, June, July, December).",
        "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 Delhi to San Francisco?",
        "answer": "For flights from Delhi to San Francisco, the optimal booking window is roughly 7 to 10 weeks before departure, with average fares around $1,018. Booking around 60 days out can yield the lowest price of about $1,010, while last-minute tickets typically cost over $1,350. For summer or holiday periods, you may want to book earlier, as prices tend to rise closer to departure.",
        "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 Delhi to San Francisco?",
        "answer": "There are no nonstop red-eye flights from Delhi to San Francisco, but connecting overnight options exist where the long-haul leg is a red-eye — for example, United via Newark departing around 11:35 PM and arriving around 6:20 AM, Air Canada via Toronto departing around 10:50 PM and arriving around 5:30 AM, or American via New York JFK departing around 11:30 PM and arriving around 5:59 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 Delhi to San Francisco?",
        "answer": "Air India operates the only nonstop flights from Delhi to San Francisco, with 13 weekly departures at various times. The median fare for Air India on this route is around $1,571. Other carriers may offer connecting itineraries, but the schedule data lists Air India as the sole nonstop operator.",
        "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 Delhi and San Francisco?",
        "answer": "Common layover hubs include Dubai, Doha, and Abu Dhabi in the Middle East, as well as Tokyo (Narita or Haneda) in East Asia. These cities offer efficient connections, often with single-terminal transfers and visa-free transit for Indian passport holders, keeping total travel times competitive on the one-stop itineraries from Delhi to San Francisco."
      },
      "q9": {
        "question": "How reliable are on‑time departures on this route from Delhi to San Francisco?",
        "answer": "On-time performance is generally dependable, though delays can occur due to Delhi's occasional fog in winter or heavy air traffic. Early morning departures, such as those on Air India, often have better on-time odds. United Airlines also operates this route with reasonable punctuality."
      },
      "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 Delhi to San Francisco?",
        "answer": "Bring a passport valid for at least six months, a valid U.S. visa or ESTA authorization, proof of onward or return travel, and a payment method for baggage. Vaccination certificates are not required, but check for any current health advisories."
      },
      "q12": {
        "question": "Which airport should I use in San Francisco?",
        "answer": "San Francisco International (SFO) is the primary airport, located about 13 miles south of downtown, with major international and domestic carriers, including United’s hub and Star Alliance partners. Oakland (OAK) is across the bay, roughly 20 miles from downtown San Francisco, and mainly serves low-cost and domestic flights. San Jose (SJC) is about 45 miles south, best for Silicon Valley access and also dominated by domestic and low-cost carriers. For most international arrivals, SFO is the logical choice."
      },
      "q13": {
        "question": "How do I get to Indira Gandhi Intl Airport from the city center?",
        "answer": "From central Delhi, the Delhi Metro Airport Express Line is the fastest and most popular, taking about 20 minutes to Terminal 3. Rideshares and taxis are convenient but slower due to traffic and cost more. Shuttle buses are cheaper but less frequent, and driving with parking is expensive."
      },
      "q14": {
        "question": "Are there hotels or sleeping facilities at San Francisco airport?",
        "answer": "San Francisco International Airport does not have hotels directly inside the terminals. The Grand Hyatt at SFO is located on airport property, connected to all terminals via the AirTrain people mover, and does not require a shuttle. Several nearby hotels offer free shuttle service."
      },
      "q15": {
        "question": "Are there currency exchange offices, prayer rooms and Wi‑Fi at San Francisco Intl Airport?",
        "answer": "San Francisco International Airport has currency exchange counters in the International Terminal and Terminal 3, a meditation room in Terminal 2 and a reflection room in Terminal 1, plus free unlimited Wi‑Fi throughout all terminals."
      },
      "q16": {
        "question": "Are there accessible services or children's facilities at the Delhi and San Francisco airports?",
        "answer": "Delhi Airport offers wheelchair assistance and accessible restrooms across all terminals; request via airline 48 hours prior. Children’s play areas are located near domestic and international boarding gates. San Francisco Airport provides Skycaps wheelchair service, an AirTrain with accessible stations, and a quiet room for travelers with disabilities. Kids' Spot play areas are in Terminals 2 and 3. Arrange assistance through your airline at least 48 hours in advance."
      },
      "q17": {
        "question": "What aircraft are typically used on flights from Delhi to San Francisco?",
        "answer": "On the nonstop Delhi–San Francisco route, the schedule data shows Air India operating a Boeing 777-300ER. For one-stop connections, common long-leg aircraft include the Boeing 787-9 (via Newark, JFK, or Tokyo), Boeing 777-300ER (via Hong Kong, Toronto, or Zurich), and the Boeing 777 (via Frankfurt or Rome), with the Airbus A380-800 also appearing via Dubai. The exact aircraft can vary by day and airline, and most modern widebodies on these routes offer Wi-Fi and seatback entertainment.",
        "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 Delhi to San Francisco?",
        "answer": "The only airline operating nonstop from Delhi to San Francisco in the schedule data is Air India, which belongs to Star Alliance. No other alliance has a carrier flying this route nonstop, though other alliances 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.",
        "toolsUsed": [
          "route_airlines"
        ]
      },
      "q20": {
        "question": "What are the best airport lounge options when departing from Delhi?",
        "answer": "At Delhi Indira Gandhi International Airport, the Air India Maharaja Lounge in Terminal 3 offers a buffet, bar, showers and quiet areas for business-class passengers and Star Alliance Gold members. The Plaza Premium Lounge in Terminal 3 provides a la carte dining, nap rooms and spa services, accessible via Priority Pass, lounge memberships or day pass. The Encalm Lounge in Terminal 3 features live cooking stations and a bar, available to Priority Pass and DragonPass holders. The American Express Lounge in Terminal 3 is exclusive to eligible Amex cardholders and serves curated meals and cocktails."
      },
      "q21": {
        "question": "What is the baggage allowance on this route from Delhi to San Francisco?",
        "answer": "Baggage allowance on Delhi–San Francisco flights depends on the airline and fare type. Basic economy often excludes a free checked bag, while standard international economy typically includes one checked bag and a carry‑on. Premium cabins offer more generous allowances."
      },
      "q22": {
        "question": "What cabin and seat options are typical from Delhi to San Francisco?",
        "answer": "Delhi to San Francisco flights typically offer Economy, Premium Economy, and flat-bed Business class on nonstop carriers like Air India and United Airlines."
      },
      "q23": {
        "question": "Are same‑day changes or standby possible on this route?",
        "answer": "Same-day changes and standby depend on the airline and fare class, with flexible and premium cabin tickets generally offering these options, while basic economy usually does not."
      },
      "q24": {
        "question": "What are the cheapest days and times to fly from Delhi to San Francisco?",
        "answer": "The cheapest day to fly from Delhi to San Francisco is Wednesday with an average fare of $1,535, while Sunday is the most expensive at $1,691. For departure time, the evening slot offers the lowest minimum price at $852, in contrast to the morning slot which has the highest minimum at $990.",
        "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 Delhi to San Francisco?",
        "answer": "A great deal on a flight from Delhi to San Francisco is any fare under $1,112, while typical prices on this route run around $1,468.",
        "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"
        ]
      }
    }
  }
}