{ "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": "A nonstop flight from Lisbon (LIS) to San Francisco (SFO) typically takes about 12 hours 35 minutes to 12 hours 50 minutes. With one stop, total travel time usually ranges from 14 to 16 hours depending on the layover city. Westbound flights often take longer due to prevailing winds, while the return eastbound flight can be around 11 hours 15 minutes." }, "q1": { "question": "Are there any direct flights from Lisbon to San Francisco?", "answer": "Yes, TAP Air Portugal flies nonstop from Lisbon to San Francisco with 14 weekly flights, operating Monday through Saturday. There is no Sunday service, and departures are spread across the morning from about 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.", "toolsUsed": [ "route_airlines" ] }, "q2": { "question": "Are there visa requirements to travel from Lisbon to San Francisco?", "answer": "Yes, there are visa requirements for traveling from Lisbon to San Francisco, depending on your citizenship. If you are a Portuguese or other eligible national, you may travel to the U.S. under the Visa Waiver Program for tourism or business stays of 90 days or less, provided you have a valid ESTA authorization. If you are a U.S. citizen, you do not need a visa for short stays in Portugal (up to 90 days within a 180-day period for tourism or business). For other nationalities, a visa may be required for either direction. Always check the latest requirements with official sources." }, "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. BART rapid rail is the fastest and most-used public transit, with a station in the International Terminal. Ride-share services like Lyft and Uber pick up on Level 5 of the Domestic Garage, while taxis are available at the arrivals curbs. Rental cars are accessible via the AirTrain Blue Line to the consolidated Rental Car Center. Hotel shuttles and Waymo autonomous rides are also available 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 around $758, $763, and $791 respectively. The most expensive months are June, July, and May, where average prices climb to $1,261, $1,162, and $1,012.", "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 the best fare from Lisbon to San Francisco, book 8–11 weeks ahead, when the average price is around $851. Booking about 65 days out can yield the lowest fare (around $845), while waiting until the last minute or booking more than 4 months in advance tends to be pricier; summer and holiday periods typically push fares higher, so aim for that 2–3 month window even earlier if traveling during peak times.", "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 operate from Lisbon to San Francisco — neither nonstop nor connecting itineraries with a red‑eye long leg are scheduled 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 the only nonstop service from Lisbon to San Francisco, with 14 weekly flights departing on Monday through Saturday. Typical departure times range from 9:00 AM to 1:00 PM, and the median fare is around $1,731. Other carriers may offer connecting itineraries, but TAP is the sole airline flying this route 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. 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 Lisbon (if connecting from elsewhere), Madrid, London, and Newark. Madrid offers efficient transfers and broad connections, while London and Newark provide extensive onward options. Lisbon itself can be a hub for TAP Air Portugal with competitive total travel times." }, "q9": { "question": "How reliable are on‑time departures on this route from Lisbon to San Francisco?", "answer": "On-time performance is generally good, but afternoon departures can face delays from airport congestion or weather. Early flights, such as those operated by TAP Air Portugal, tend to be more punctual." }, "q10": { "question": "Which months have the best weather for traveling to San Francisco?", "answer": "September to November offers the warmest and sunniest weather with 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 at least six months beyond your stay, a valid ESTA or U.S. visa, 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, located 13 miles south of downtown, serving major global alliances and offering extensive domestic and international routes. Oakland International, across the bay, is a hub for low‑cost carriers and provides an alternative for budget‑conscious travellers. San Jose International serves the South Bay and Silicon Valley, convenient for tech business travel." }, "q13": { "question": "How do I get to Humberto Delgado Airport from the city center?", "answer": "From downtown Lisbon, the metro’s red line is the fastest and most popular way to reach Humberto Delgado Airport, with trains running every 6–10 minutes and taking about 20–25 minutes from central stations like Alameda or Saldanha. Public buses (lines 705, 722, 744, and 783) and the Aerobus shuttle also serve the airport; Aerobus Line 1 runs every 20–25 minutes from Cais do Sodré via the city center, taking around 40 minutes, and costs about €4 for a 24-hour pass. Taxis and ride‑share services are widely available and take 15–30 minutes depending on traffic, with a metered fare that’s higher than public transport. Driving and parking are possible but less convenient for visitors, as the airport’s parking garages fill quickly and rates accumulate, so most travelers prefer the metro for its speed and reliability.", "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 (SFO) has the Grand Hyatt at SFO, an on-site hotel connected to the terminals via the AirTrain and accessible without a shuttle. Additionally, hourly nap rooms and showers are available in the International Terminal. Several nearby hotels, such as the San Francisco Airport Marriott Waterfront and The Westin San Francisco Airport, offer complimentary shuttle service to and from the airport.", "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 (SFO) has currency exchange services available; check the full Passenger Services listing for terminal locations. A Reflection Room, which includes a prayer room, is available for quiet self-reflection and meditation. Free Wi‑Fi is offered throughout the terminals.", "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": "TAP Air Portugal flies the Lisbon–San Francisco route nonstop using the Airbus A330-900neo. On one-stop itineraries, the long-haul leg most commonly features Boeing 787-10s or 777s via Newark, with other connections on Boeing 787-9s, 777s, or 747-8Is through Frankfurt, Montreal, Munich, or Washington Dulles. The exact aircraft can vary by day and airline, but Wi‑Fi and seatback entertainment are widely available on these long‑haul flights.", "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": "At Lisbon Portela Airport (LIS), the main lounge is the ANA Lounge Lisbon, located in Terminal 1 after security and passport control near Gate 22 on Floor 6, accessible to both Schengen and non-Schengen passengers. It is open daily from 4:00 AM to 11:00 PM and offers complimentary alcoholic drinks (up to three), a smoking room, and air conditioning; children under two enter free. Access is available through Priority Pass, and likely to business class passengers and elite status holders of partner airlines. While TAP Portugal operates its own lounge at LIS, specific details on it are not confirmed here, so the ANA Lounge is the most reliably documented option.", "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 rules vary by airline. Basic economy fares often exclude a checked bag; standard economy usually includes one checked bag and a carry-on. Premium cabins offer more generous allowances." }, "q22": { "question": "What cabin and seat options are typical from Lisbon to San Francisco?", "answer": "Lisbon to San Francisco flights typically offer Economy and flat‑bed Business class; Premium Economy is available on some airlines, while First class is rare." }, "q23": { "question": "Are same‑day changes or standby possible on this route?", "answer": "Policies differ by airline and fare; flexible and premium‑cabin tickets often allow same‑day changes or standby, while Basic Economy usually does not." } } } }