Cheap flights from San Francisco to London from $303
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to London departing on 1/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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United Airlines flights from San Francisco to London, Ontario
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Use the filters below to find and compare flights from San Francisco to London, Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Tue 10/20
6:00 am-5:20 am
1 stop20h 20m
London
Thu 10/22
6:10 am-12:00 pm
1 stop8h 50m
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Wed 11/18
12:55 am-2:42 pm
2 stops10h 47m
London
Thu 11/26
9:15 am-3:40 pm
1 stop9h 25m
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Wed 11/18
12:55 am-2:42 pm
2 stops10h 47m
London
Thu 11/26
5:30 am-4:33 pm
2 stops14h 03m
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Wed 12/23
4:40 pm-8:37 am
1 stop12h 57m
London
Wed 12/30
5:30 am-11:10 am
1 stop8h 40m
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Tue 10/20
8:30 am-7:40 pm
1 stop8h 10m
London
Thu 10/22
3:30 pm-6:41 am
2 stops18h 11m
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Wed 12/23
4:40 pm-8:37 am
1 stop12h 57m
London
Wed 12/30
5:30 am-2:57 pm
2 stops12h 27m
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Tue 10/20
11:39 pm-2:50 pm
2 stops12h 11m
London
Thu 10/22
3:30 pm-7:41 am
2 stops19h 11m
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Tue 10/20
1:00 pm-5:20 am
1 stop13h 20m
London
Thu 10/22
6:10 am-12:00 pm
1 stop8h 50m
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Tue 10/20
6:00 am-5:20 am
3 stops20h 20m
London
Sat 10/31
7:40 am-8:32 pm
2 stops15h 52m
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Tue 10/20
6:00 am-5:20 am
1 stop20h 20m
London
Thu 10/22
6:10 am-12:00 pm
1 stop8h 50m
See travel insights to London from
How to get the cheapest flight ticket from San Francisco to London, Ontario
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest airline that flies from San Francisco to London?
Air Canada and United Airlines are the most popular carriers operating from San Francisco to London
What airlines fly to London, Ontario?
Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to London, Ontario from San Francisco according to our data. Air Canada is the first choice among our users, with 38% of people opting to fly with this airline when traveling to London, Ontario. Keep in mind that there are 8 different airlines that fly to London, Ontario on a routine basis, so you have a few additional options to choose from.
When to book flights from San Francisco to London, Ontario
Cheap San Francisco to London, Ontario (SFO to YXU) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from San Francisco to London, Ontario
Frequently asked questions about flying from San Francisco to London, Ontario
How far is San Francisco to London by plane?
San Francisco and London are 2172.7 mi apart from one another. Typically, this will take 8h 10m by plane in normal conditions.
When did momondo last update prices for flights from San Francisco Airport to London Airport?
Prices for flights from San Francisco Airport to London Airport were last updated today.
How many operators does momondo search for flights from San Francisco Airport to London Airport?
As of October 2026, there are 2 operators available to choose from for flights from San Francisco Airport to London Airport.
How old do you have to be to fly from San Francisco Airport to London Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Francisco Airport to London Airport.
What documentation or ID do you need to fly to London Airport?
The necessary travel and health documents for your London Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from San Francisco to London, Ontario?
Based on momondo bookings for this flight route, the most popular airline on flight routes from San Francisco to London, Ontario is WestJet (77% of total bookings). The next most popular airline is Air Canada (23%).
Best airlines flying from San Francisco to London, Ontario
Compare and see reviews for airlines that fly from San Francisco to London, Ontario with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $357 | Free Cancellation | Rating 7.1 11,748 reviews | |||
| PriceFrom $366 | Free Cancellation | Rating 7.2 3,452 reviews |
Traveling to a place near London?
Book flights to London if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from San Francisco to London?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from San Francisco to London. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from San Francisco to London with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to London from San Francisco with this policy.
How can momondo help me find flights from San Francisco to London?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Francisco to London.
I’m not ready to book a flight from San Francisco to London right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to London from San Francisco. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.