Cheap Flights from San Francisco (SFO) to London (YXU)

Compare San Francisco International to London flight deals

Find the cheapest month or even day of the year to fly to London

Book the best London fare with no extra fees

Flight deals from San Francisco International to London

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

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

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

San Francisco International to London: Alternative routes

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

San Francisco to London: Flight information

The things to know before you go.
Cheapest flight found$587
Cheapest month to flyAugust

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

The best price we found for a return flight from San Francisco International to London is $587. 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 San Francisco International to London. But we found flights with one or more stops from $587.
As of June 2025, there are no flights flying from San Francisco International to London.
The cheapest month to fly from San Francisco International to London is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Francisco International Airport to London Airport on Sunday, 10 August 2025.
No airlines currently offer direct flights between San Francisco International Airport and London 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 London 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 London is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, WestJet offers the cheapest flight tickets to London.

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

  • London is three hours ahead of San Francisco and follows the UTC-4 timezone.

  • For a smooth journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This way, you can comfortably catch your SFO to YXU flight.

  • Flying during a peak month like August? Major public holidays and other popular seasons can mean longer lines at check-in and security. Be extra cautious and arrive up to four hours before an international flight and two hours before domestic departures.

  • We make it a piece of cake to book a flight with a stopover. To see your options for tickets from San Francisco International Airport to London International Airport, uncheck 'Direct flights only.' Then, choose a flight offering a stop long enough to explore the city of your choice. Worthwhile stopovers between SFO and YXU include:

    • Pearson International Airport

    • Calgary International Airport

    • Cancun International Airport

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

  • $268 is the best price for a one-way San Francisco International Airport to London International Airport flight. Return flights start from $587. These prices may change based on demand.

  • To find cheap tickets from SFO to YXU, book in advance. Airlines generally offer their best fares when flights are first made available.

  • Finding cheap flights from San Francisco International Airport to London International Airport is more likely if you can be flexible with your travel dates. Use the 'Whole month' function to see the lowest fares across every month and land a great deal.

  • Snapping up cheap flights from SFO to YXU is a piece of cake with Price Alerts. All you need to do is create one of these automatic alerts and we'll let you know when a new deal comes up.

  • Tailor your flights using filters. Choose your departure and arrival times, airlines and total journey duration. You can also sort your results by 'Cheapest,' 'Best' or 'Fastest' flights from San Francisco International Airport to London International Airport.

Handy information about San Francisco International Airport (SFO)

  • 77.36% of flights that depart San Francisco International Airport arrive at their destination on time.

  • To reach San Francisco International Airport from central San Francisco, it takes about 20 minutes if you're going by car. This depends on traffic, however. It's approximately 21 kilometres from the airport to the city centre.

  • You can expect a trip time of around 45 minutes on public transport.

  • Searching for a convenient hotel near SFO? If you're catching an early flight from San Francisco International Airport to London International Airport, these stays will have you moments from your departure gate:

Arriving at London International Airport (YXU)

  • The last thing you need is a lengthy journey to your hotel if you're getting in late on a San Francisco International Airport to London International Airport flight. Stay at one of these accommodation options near YXU instead:

  • Pick up a London International Airport rental car and discover London and beyond with your own set of wheels. Alamo, Avis and National are leading providers to choose from here.

  • Reserving your vehicle from London International Airport around three weeks ahead gives you the best chance of locking in a great deal.

Getting from London International Airport (YXU) to central London

  • London International Airport is roughly 11 kilometres from the centre of London. Driving there takes about 20 minutes.

  • It takes roughly 55 minutes if you're travelling by public transport.

When to fly to London International Airport (YXU)

  • It's time to pick your travel dates for your flight from San Francisco International Airport to London International Airport. August is the busiest month to head to London. If you'd like a more laid-back vibe, go in November.

  • When booking your flight from San Francisco International Airport to London International Airport, consider the kind of weather you like. July is the warmest month in London, with the temperature ranging from 13ºC (55ºF) to 27ºC (81ºF).

  • If you want to travel in cooler conditions, search for a cheap ticket from SFO to YXU in January. Average temperatures are between -13ºC (9ºF) and 2ºC (36ºF) then.

Explore more of Canada

  • London has its own special appeal, but there are so many other parts of Canada waiting to be discovered. About 161 kilometres north-east of London, a trip to Toronto will keep you on the move. Don't miss top attractions like CN Tower, Royal Ontario Museum and Go Tours Canada - Distillery District.

  • Around 145 kilometres north-east of London, Mississauga is another favourite stop in Canada. Get a taste of what this destination has to offer at Credit Meadows Park, Tree Sculpture - Animal Totem by Jim Menken and Dunn Park.

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