{"response": {"Key": "LIS-SFO", "orig": {"code": "LIS", "type": "airport", "city": "Lisbon", "fullCity": "Lisbon, Portugal", "airport": "Humberto Delgado 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 Lisbon to San Francisco?", "answer": "The flight from Lisbon to San Francisco is about 5,670 miles and typically takes 12 hours and 35 minutes nonstop. Returning is shorter at 11 hours and 15 minutes due to prevailing winds.", "methodology": "Carrier service, flight times and distances for this route come 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). We report the days of the week and the departure times each carrier operates. The typical flight time is the median scheduled block time, given both per carrier and across all carriers on the route; where a schedule does not publish an elapsed time, it is derived from the scheduled departure and arrival times converted to UTC. Outbound and return times are computed by the same method, so the difference between them is directly comparable and reflects prevailing winds rather than any change in derivation. Distance is the great-circle distance between the two specific airports named, so an actual flown track is typically 2-5% longer. Where shown, on-time departure and arrival rates and cancellation rates come from the U.S. Bureau of Transportation Statistics (BTS) Airline On-Time Performance dataset, which covers U.S. domestic routes only; where a typical fare is shown, it comes from the U.S. DOT Airline Origin and Destination Survey (DB1B), a quarterly 10% sample of tickets sold.", "toolsUsed": ["flight_schedule"]}, "q1": {"question": "Are there any direct flights from Lisbon to San Francisco?", "answer": "TAP Air Portugal flies nonstop from Lisbon to San Francisco with 14 weekly flights, operating Monday through Saturday. The flight takes about 12 hours and 35 minutes westbound, with departures spread across the morning from 9:00 AM to 1:00 PM.", "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. Carrier service, flight times and distances for this route come 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). We report the days of the week and the departure times each carrier operates. The typical flight time is the median scheduled block time, given both per carrier and across all carriers on the route; where a schedule does not publish an elapsed time, it is derived from the scheduled departure and arrival times converted to UTC. Outbound and return times are computed by the same method, so the difference between them is directly comparable and reflects prevailing winds rather than any change in derivation. Distance is the great-circle distance between the two specific airports named, so an actual flown track is typically 2-5% longer. Where shown, on-time departure and arrival rates and cancellation rates come from the U.S. Bureau of Transportation Statistics (BTS) Airline On-Time Performance dataset, which covers U.S. domestic routes only; where a typical fare is shown, it comes from the U.S. DOT Airline Origin and Destination Survey (DB1B), a quarterly 10% sample of tickets sold.", "toolsUsed": ["route_airlines", "flight_schedule"]}, "q3": {"question": "What are the ground transportation options in San Francisco?", "answer": "From SFO, the fastest and most-used option to downtown San Francisco is BART (rapid rail), which connects directly from the International Terminal. Ride-share services like Lyft and Uber pick up on Level 5 of the Domestic Garage, and taxis are available at the arrivals curbside. Rental cars are accessible via the AirTrain Blue Line to a consolidated Rental Car Center, and many hotels offer complimentary shuttles. SamTrans buses and Caltrain commuter rail provide additional public transit connections, while autonomous Waymo rides are an emerging option for select passengers.", "toolsUsed": [], "references": [{"url": "https://flysfo.com/passengers/ground-transportation", "title": "Ground Transportation | San Francisco International Airport", "favicon": "https://flysfo.com/themes/custom/blueskies/favicon.ico", "time_published": "2026-04-08T21:19:40Z"}, {"url": "https://flysfo.com/de/node/10188", "title": "Ground Transportation | San Francisco International Airport", "favicon": "https://flysfo.com/themes/custom/blueskies/favicon.ico", "time_published": "2026-04-08T21:19:40Z"}, {"url": "https://en.wikipedia.org/wiki/SFO", "title": "San Francisco International Airport", "time_published": "2026-04-27T05:13:36Z"}, {"url": "https://en.wikipedia.org/wiki/San_Francisco_International_Airport", "title": "San Francisco International Airport", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-07-18T07:52:09Z"}, {"url": "https://www.flysfo.com/pt-br", "title": "Home Page | San Francisco International Airport", "time_published": "2026-01-01T00:00:00Z"}]}, "q4": {"question": "When is the cheapest time to fly from Lisbon to San Francisco?", "answer": "The cheapest months to fly from Lisbon to San Francisco are November, April, and October, with average fares as low as $759. The most expensive period is early summer, with June averaging $1261, followed by July and May. Late fall and early spring offer the lowest prices, while late spring through mid-summer sees significantly higher fares.", "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 Lisbon to San Francisco?", "answer": "For flights from Lisbon to San Francisco, the best fares are typically found when booking 8 to 11 weeks ahead, with an average price around $858. The single cheapest day to book is about 65 days before departure at $851, while prices rise sharply if you book more than 15 weeks out or less than 3 weeks in advance.", "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 Lisbon to San Francisco?", "answer": "No overnight (red-eye) flights are available from Lisbon to San Francisco — neither a nonstop red-eye nor a connecting itinerary whose long leg is a red-eye operates 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 Lisbon to San Francisco?", "answer": "TAP Air Portugal operates non‑stop service from Lisbon to San Francisco with about 14 flights each week, departing every day except Sunday. The median fare for TAP on this route is approximately $1,651.", "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 Lisbon and San Francisco?", "answer": "Common layovers include New York, Newark, Boston, and Chicago. These hubs offer broad connections and efficient transfers, keeping total travel time competitive while providing smooth U.S. entry."}, "q10": {"question": "Which months have the best weather for traveling to San Francisco?", "answer": "September to October 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 Lisbon to San Francisco?", "answer": "Bring a passport valid for the duration of your U.S. stay, your ESTA authorization or visa, proof of onward or return travel, and a payment method for bags. Check if any vaccination certificates are currently required."}, "q12": {"question": "Which airport should I use in San Francisco?", "answer": "San Francisco International is the primary airport and the most convenient for international arrivals like Lisbon. It is 13 miles south of downtown with BART rail access. Oakland International across the bay serves mostly domestic low‑cost carriers and is further from central San Francisco. San Jose International is even farther south, catering to Silicon Valley travellers."}, "q13": {"question": "How do I get to Humberto Delgado Airport from the city center?", "answer": "From downtown Lisbon, the Aerobus shuttle (Lines 1 and 2) is a popular direct option running every 20–25 minutes and taking 20–40 minutes to the airport, with a 24‑hour pass that includes unlimited use. Public city buses (e.g., 5, 22, 44, 45, 83) are the cheapest way, serving the airport from various points. Taxis are available at ranks throughout the city, with a metered fare plus an airport surcharge and luggage fees. Ride‑share services also operate, and driving is possible though parking at the airport adds cost; the Aerobus is often the fastest and most convenient for travelers without a car.", "toolsUsed": [], "references": [{"url": "http://lisbon-lis.airports-guides.com", "title": "Lisbon Portela Airport (LIS) Information: LIS Airport in Lisbon Area, Portugal"}, {"url": "http://www.lisbon-lis.airports-guides.com/lis_airport_transport.html", "title": "Lisbon Portela Airport (LIS) Travel, Transport: Travel at Airports in Lisbon Area, Portugal", "time_published": "2016-03-03T00:00:00Z"}, {"url": "https://www.lisbon-airport.net/", "title": "Lisbon Airport (LIS)"}, {"url": "https://lisbonairport.net/lisbon-airport-transfers/bus/", "title": "Getting to Lisbon Airport by Bus", "time_published": "2019-03-02T00:00:00Z"}, {"url": "https://lisbonairport.net", "title": "Lisbon Airport | Guide to Lisbon Airport (LIS)"}]}, "q14": {"question": "Are there hotels or sleeping facilities at San Francisco airport?", "answer": "San Francisco International Airport has the Grand Hyatt at SFO directly on airport property, accessible via the AirTrain and located near the International Terminal. There are no capsule hotels or sleeping pods inside the terminals, but the airport offers showers and some comfortable seating areas for resting. Several nearby hotels like the San Francisco Airport Marriott Waterfront and The Westin San Francisco Airport provide complimentary shuttle service from the terminals.", "toolsUsed": [], "references": [{"url": "https://www.sleepinginairports.net/guides/san-francisco-airport-guide.htm", "title": "San Francisco Airport Guide (SFO) - Sleeping in Airports", "favicon": "https://www.sleepinginairports.net/nitropack_static/oBWrHkPujHTPIaVWqdDSDhClXUyrYhhb/assets/images/optimized/rev-b853180/www.sleepinginairports.net/wp-content/uploads/2018/09/cropped-sia-logo-180x180.png", "time_published": "2018-10-02T00:00:42Z"}, {"url": "https://www.marriott.com/en-us/hotels/sfobg-san-francisco-airport-marriott-waterfront/overview/?EM=DNM_SANFRANCISCOAIRPORTMARRIOTT.COM", "title": "SFO Airport Hotel | San Francisco Airport Marriott Waterfront", "time_published": "2025-02-19T00:00:00Z"}, {"url": "https://www.marriott.com/en-us/hotels/sfowi-the-westin-san-francisco-airport/overview/?scid=f2ae0541-1279-4f24-b197-a979c79310b0", "title": "The Westin San Francisco Airport (Official Site) - SFO Hotel", "time_published": "2025-02-19T00:00:00Z"}, {"url": "https://www.flysfo.com/passengers/shop-dine-relax?content_type=things_to_do&location=3&sort_by=random", "title": "Shop/Dine/Relax | San Francisco International Airport", "time_published": "2025-10-22T23:13:26Z"}, {"url": "https://www.flysfo.com/passengers/shop-dine-relax?content_type=All&gate_area=All&https://www.flysfo.com/passengers/shop-dine-relax?https://www_flysfo_com/passengers/shop-dine-relax?https://www_flysfo_com/passengers/shop-dine-relax?location=2&location=1659&security=All&service_tags=All&sort_by=random", "title": "Shop/Dine/Relax | San Francisco International Airport", "time_published": "2025-10-22T23:13:26Z"}, {"url": "http://www.flysfo.com/de/node/14691", "title": "Press Releases | San Francisco International Airport", "time_published": "2025-07-09T15:54:20Z"}]}, "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 services, prayer and meditation spaces, and free Wi‑Fi. Currency exchange counters are available in the International Terminal and Terminal 3. A Reflection Room for quiet prayer or meditation is located in the terminals, and free Wi‑Fi is provided throughout the airport.", "toolsUsed": [], "references": [{"url": "https://flysfo.com/passengers/shop-dine-relax", "title": "Shop/Dine/Relax | San Francisco International Airport", "time_published": "2026-03-12T16:15:43Z"}, {"url": "http://www.flysfo.com/welcome-terminal-3", "title": "Welcome to Terminal 3 | San Francisco International Airport", "favicon": "http://www.flysfo.com/themes/custom/blueskies/favicon.ico", "time_published": "2026-05-08T21:34:33Z"}, {"url": "https://en.wikipedia.org/wiki/San_Francisco_International_Airport", "title": "San Francisco International Airport", "favicon": "https://en.wikipedia.org/static/apple-touch/wikipedia.png", "time_published": "2026-07-18T07:52:09Z"}, {"url": "https://en.wikipedia.org/wiki/San%20Francisco%20International%20Airport", "title": "San Francisco International Airport", "time_published": "2026-04-28T21:12:40Z"}, {"url": "https://flysfo.com/passengers/services-amenities", "title": "Services & Amenities | San Francisco International Airport", "favicon": "https://flysfo.com/themes/custom/blueskies/favicon.ico", "time_published": "2026-03-03T22:32:54Z"}]}, "q17": {"question": "What aircraft are typically used on flights from Lisbon to San Francisco?", "answer": "The only nonstop aircraft on the Lisbon–San Francisco route is the Airbus A330-900neo, operated by TAP Air Portugal. When connecting, the most common long‑leg types are the Boeing 777 (via Washington‑Dulles, Frankfurt, and other hubs on United), the Airbus A330-300 (via Montréal on Air Canada), the Boeing 787‑9 (via Frankfurt and Philadelphia), and the Boeing 777‑300ER (via Toronto, London‑Heathrow, and other points). The exact aircraft on a given day depends on the airline and connection, but these widebody types dominate the route, and most 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"]}, "q20": {"question": "What are the best airport lounge options when departing from Lisbon?", "answer": "Lisbon Airport (LIS) has one main lounge option in Terminal 1: the ANA Lounge Lisbon, accessible to Priority Pass members and passengers of participating airlines. It is open daily from 4:00 AM to 11:00 PM and located after security and passport control near Gate 22 on Floor 6, serving both Schengen and non-Schengen flights. The lounge offers complimentary standard alcoholic drinks (up to three), a smoking room, and air conditioning, with a business center available for a fee. Smart casual dress is required, and children under two are admitted free.", "toolsUsed": [], "references": [{"url": "http://lisbon-lis.airports-guides.com", "title": "Lisbon Portela Airport (LIS) Information: LIS Airport in Lisbon Area, Portugal"}, {"url": "https://my.prioritypass.com/en-GB/lounges/portugal/lisbon-portela", "title": "Lisbon Airport LIS Lounges - LIS Airport Guide and lounges.  | Priority Pass", "time_published": "2024-11-05T00:00:00Z"}, {"url": "https://prioritypass.com/en-GB/lounges/portugal/lisbon-portela/lis6-ana-lounge-lisbon", "title": "ANA Lounge Lisbon LIS AIRPORT Terminal 1 Lisbon Portela | Priority Pass", "time_published": "2024-11-05T00:00:00Z"}, {"url": "http://www.lisbon-lis.airports-guides.com/lis_airport_airlines.html", "title": "Lisbon Portela Airport (LIS) Airlines and Terminals: Airlines at Airports in Lisbon Area, Portugal", "time_published": "2016-03-03T00:00:00Z"}, {"url": "https://americanexpress.com/en-us/travel/lounges/the-platinum-card/LIS", "title": "American Express Lounges at Lisbon Portela Airport | Amex US", "favicon": "https://www.americanexpress.com/apple-touch-icon-152x152.png"}]}, "q21": {"question": "What is the baggage allowance on this route from Lisbon to San Francisco?", "answer": "Baggage allowance on Lisbon–San Francisco flights varies by airline and fare type. Basic Economy tickets are restrictive and may not include a checked bag. Standard international economy fares typically include one checked bag and a carry‑on, while premium cabins offer more."}, "q22": {"question": "What cabin and seat options are typical from Lisbon to San Francisco?", "answer": "Flights from Lisbon to San Francisco typically offer Economy and flat-bed Business class, with Premium Economy available on select airlines."}, "q23": {"question": "Are same‑day changes or standby possible on this route?", "answer": "Policies vary by airline and fare class; flexible and premium cabin tickets often allow same‑day changes or standby, while restrictive economy fares generally do not."}}}}