What is the cheapest airline that flies from San Francisco to London?

Air Canada is the most popular carrier 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 42% of people opting to fly with this airline when traveling to London, Ontario. Keep in mind that there are 7 different airlines that fly to London, Ontario on a routine basis, so you have a few additional options to choose from.

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 January 2026, there are 3 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.

$137 Cheap Flights from San Francisco to London in 2026

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Find the cheapest flights from San Francisco to London

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:20 pm - 8:46 am

SFO

YXU

16h 26m2 stops

5:10 am - 10:54 am

YXU

SFO

8h 44m1 stop

$323Air Canada

Thu, Feb 19 - Thu, Feb 26

12:00 pm - 8:46 am

SFO

YXU

17h 46m1 stop

5:10 am - 10:54 am

YXU

SFO

8h 44m1 stop

$327Air Canada

Thu, Feb 19 - Thu, Feb 26

2:45 pm - 5:12 am

SFO

YXU

11h 27m2 stops

8:00 pm - 1:57 pm

YXU

SFO

20h 57m2 stops

$330WestJet

Sat, Jun 27 - Wed, Jul 1

1:20 pm - 8:46 am

SFO

YXU

16h 26m2 stops

5:40 pm - 12:20 pm

YXU

SFO

21h 40m2 stops

$336Air Canada

Thu, Feb 19 - Thu, Feb 26

2:45 pm - 5:12 am

SFO

YXU

11h 27m2 stops

8:00 pm - 11:54 am

YXU

SFO

18h 54m1 stop

$339WestJet

Sat, Jun 27 - Wed, Jul 1

8:30 am - 9:21 pm

SFO

YXU

9h 51m1 stop

5:10 am - 10:54 am

YXU

SFO

8h 44m1 stop

$361Air Canada

Thu, Feb 19 - Thu, Feb 26

6:00 pm - 8:46 am

SFO

YXU

11h 46m2 stops

5:40 pm - 10:34 am

YXU

SFO

19h 54m2 stops

$370Air Canada

Tue, Jan 20 - Wed, Jan 21

1:00 pm - 6:34 am

SFO

YXU

14h 34m1 stop

8:10 pm - 12:12 pm

YXU

SFO

19h 02m1 stop

$385WestJet

Tue, Jan 20 - Wed, Jan 21

2:30 pm - 8:46 am

SFO

YXU

15h 16m1 stop

5:40 pm - 10:34 am

YXU

SFO

19h 54m2 stops

$389Air Canada

Tue, Jan 20 - Wed, Jan 21

10:15 am - 6:35 am

SFO

YXU

17h 20m2 stops

8:10 pm - 12:10 pm

YXU

SFO

19h 00m1 stop

$396Multiple Airlines

Thu, Feb 19 - Thu, Feb 26

United Airlines flights from San Francisco to London, Ontario

Our best United Airlines deals on San Francisco to London, Ontario flight tickets

United Airlines

Feb 20

SFO11:59 pmSan Francisco

14h 06m

2 stops

YXU5:05 pmLondon

Feb 27

YXU5:10 amLondon

8h 44m

1 stop

SFO10:54 amSan Francisco

$467

Find similar

United Airlines

Feb 20

SFO9:20 pmSan Francisco

16h 45m

2 stops

YXU5:05 pmLondon

Feb 27

YXU5:10 amLondon

20h 48m

2 stops

SFO10:58 pmSan Francisco

$482

Find similar

United Airlines

Feb 20

SFO8:30 amSan Francisco

9h 51m

1 stop

YXU9:21 pmLondon

Feb 27

YXU5:10 amLondon

8h 44m

1 stop

SFO10:54 amSan Francisco

$565

Find similar

Air Canada flights from San Francisco to London, Ontario

Our best Air Canada deals on San Francisco to London, Ontario flight tickets

Air Canada

Feb 19

SFO1:20 pmSan Francisco

16h 26m

2 stops

YXU8:46 amLondon

Feb 26

YXU5:10 amLondon

8h 44m

1 stop

SFO10:54 amSan Francisco

$323

Find similar

Air Canada

Feb 19

SFO12:00 pmSan Francisco

17h 46m

1 stop

YXU8:46 amLondon

Feb 26

YXU5:10 amLondon

8h 44m

1 stop

SFO10:54 amSan Francisco

$327

Find similar

Air Canada

Feb 19

SFO1:20 pmSan Francisco

16h 26m

2 stops

YXU8:46 amLondon

Feb 26

YXU5:40 pmLondon

21h 40m

2 stops

SFO12:20 pmSan Francisco

$336

Find similar

momondo Fare Finder

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

Price

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 2/19

1:20 pm-8:46 am

2 stops16h 26m

London

Thu 2/26

5:10 am-10:54 am

1 stop8h 44m

$323

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 2/19

12:00 pm-8:46 am

1 stop17h 46m

London

Thu 2/26

5:10 am-10:54 am

1 stop8h 44m

$327

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 6/27

2:45 pm-5:12 am

2 stops11h 27m

London

Wed 7/1

8:00 pm-1:57 pm

2 stops20h 57m

$330

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 2/19

1:20 pm-8:46 am

2 stops16h 26m

London

Thu 2/26

5:40 pm-12:20 pm

2 stops21h 40m

$336

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 6/27

2:45 pm-5:12 am

2 stops11h 27m

London

Wed 7/1

8:00 pm-11:54 am

1 stop18h 54m

$339

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 2/19

8:30 am-9:21 pm

1 stop9h 51m

London

Thu 2/26

5:10 am-10:54 am

1 stop8h 44m

$361

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 1/20

6:00 pm-8:46 am

2 stops11h 46m

London

Wed 1/21

5:40 pm-10:34 am

2 stops19h 54m

$370

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 1/20

1:00 pm-6:34 am

1 stop14h 34m

London

Wed 1/21

8:10 pm-12:12 pm

1 stop19h 02m

$385

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 1/20

2:30 pm-8:46 am

1 stop15h 16m

London

Wed 1/21

5:40 pm-10:34 am

2 stops19h 54m

$389

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 2/19

10:15 am-6:35 am

2 stops17h 20m

London

Thu 2/26

8:10 pm-12:10 pm

1 stop19h 00m

$396

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first

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

Prices

Airlines

Can stopping save me money on San Francisco to London, Ontario flights?

You could potentially save up to 41% on your flight if you consider stops on a San Francisco to London, Ontario flight.

When to book flights from San Francisco to London, Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to London, Ontario according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

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

Fastest flight time	7h 00m
Direct flights	None

The fastest flight from San Francisco to London, Ontario takes 7h 00m

There are no direct flights from San Francisco to London, Ontario. There are no popular flight routes from San Francisco to London, Ontario.

Search flight deals

How far is San Francisco to London by plane?
San Francisco and London are 2173.0 mi apart from one another. Typically, this will take 7h 00m 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 January 2026, there are 3 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 United Airlines (35% of total bookings). The next most popular airlines are Air Canada (32%) and WestJet (32%).

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
WestJet	PriceFrom $162	Free Cancellation	Rating 7.2 3,235 reviews	Search WestJet flights
United Airlines	PriceFrom $192	Free Cancellation	Rating 7.4 9,138 reviews	Search United Airlines flights
Air Canada	PriceFrom $210	Free Cancellation	Rating 7.1 10,600 reviews	Search Air Canada flights

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Why 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.