C$218 Cheap Flights from London to San Francisco International

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      Travelers and cabin class, 1 Adult, Economy

      Compare London to San Francisco International flight deals

      Find the cheapest month or even day of the year to fly to San Francisco International

      Book the best San Francisco International fare with no extra fees

      Flight deals from London to San Francisco International

      Looking for a cheap last-minute deal or the best round-trip flight from London to San Francisco International? Find the lowest prices on one-way and round-trip tickets right here.

      Find the cheapest month to fly from London to San Francisco International

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London to San Francisco International flights are currently cheapest in November.

      London to San Francisco International: Alternative routes

      Compare routes from London to San Francisco below. You may find an airport to fly into that's cheaper, faster, or easier than San Francisco International.

      London to San Francisco: Flight information

      The things to know before you go.
      Cheapest flight foundC$379
      Cheapest month to flyAugust

      Finding cheap flights from London to San Francisco International: Frequently asked questions

      The best price we found for a round-trip flight from London to San Francisco International is C$379. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      Currently, there are no airlines that fly direct from London to San Francisco International. But we found flights with one or more stops from C$379.
      There are no flights flying from London to San Francisco International, as of July 2025.
      The cheapest month to fly from London to San Francisco International is usually August.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Airport to San Francisco International Airport on Saturday, August 30, 2025.
      No airlines currently offer direct flights between London Airport and San Francisco International Airport. Most routes have one or more stops.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Francisco International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
      We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to San Francisco is around 40 days in advance, so don’t leave your flight to the last minute.
      Currently, WestJet offers the cheapest flight tickets to San Francisco International.

      Flying from London International Airport (YXU) to San Francisco International Airport (SFO): what you need to know

      • San Francisco's timezone is UTC-7, which makes San Francisco three hours behind London.

      • Leave plenty of time to make your YXU to SFO flight. It's generally best to arrive at least two hours before international departures and an hour ahead for domestic flights.

      • During popular months such as August, you'll want to get to the airport earlier. Arrive two hours before a domestic departure and four hours ahead of an international flight when you fly during a high season in general.

      How to find the cheapest flights from London International Airport (YXU) to San Francisco International Airport (SFO)

      • The lowest price we've seen for a one-way London International Airport to San Francisco International Airport flight is C$218. A return plane ticket right now is C$380. Depending on the availability and when you book, these fares could change.

      • It's a good idea to book in advance if you're looking for cheap tickets from YXU to SFO. That's because airlines adjust prices based on demand, which tends to rise closer to departure.

      • If you're willing to be flexible with your trip dates, try using the 'Whole month' tool. It'll show you the lowest price in every month when searching for your flight from London International Airport to San Francisco International Airport.

      • You won't have to check every day to see if fares have gone down when you set up a Price Alert. We'll notify you the moment there's a change in price on cheap flights from YXU to SFO.

      • Lock in the ideal flight for you by using the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from London International Airport to San Francisco International Airport, use the 'Sort by' function. You can also filter by airline, departure and arrival times, and number of stops.

      Handy information about London International Airport (YXU)

      • When it comes to London International Airport's on-time performance, data shows 50.41% of flights arrive within the scheduled timeframe.

      • To get to London International Airport from central London, it'll take about 20 minutes if you're planning to drive. Of course, this depends on traffic conditions. It's approximately 11 kilometres from the airport to the city centre.

      • You can expect a trip time of around 55 minutes when using public transport.

      • Searching for a convenient hotel near YXU? If you've booked an early flight from London International Airport to San Francisco International Airport, these accommodation options will put you moments from your departure lounge:

      Arriving at San Francisco International Airport (SFO)

      Getting from San Francisco International Airport (SFO) to central San Francisco

      • San Francisco International Airport to the centre of San Francisco has a drive time of about 20 minutes. It's approximately 21 kilometres away.

      • It'll take around 45 minutes to get there using public transport.

      When to fly to San Francisco International Airport (SFO)

      • August is the most popular month for flights from London International Airport to San Francisco International Airport. For a quieter experience, head to San Francisco in February.

      • The warmest month in San Francisco is September, with temperatures ranging between 12ºC (54ºF) and 22ºC (72ºF). Book your flights from London International Airport to San Francisco International Airport in this month if this is the type of weather you enjoy.

      • Search for cheap tickets from YXU to SFO in January if you like travelling in cooler conditions. Temperatures are at their lowest around then, ranging between 6ºC (43ºF) and 16ºC (61ºF) on average.

      Explore more of United States

      • You've done San Francisco, now it's time to explore other corners of United States. Travel about 64 kilometres south-east to San Jose to tick off its leading sights. From Winchester Mystery House to Rosicrucian Egyptian Museum and San Jose Museum of Art, you've got a jam-packed schedule ahead.

      • If you're looking to explore another side of United States, head for Fresno, about 257 kilometres south-east of San Francisco. Forestiere Underground Gardens, Fresno Chaffee Zoo and Shinzen Japanese Garden are the start of reasons to visit.

      Prices shown on this page are estimated lowest prices only. Found in the last 45 days.