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

United Airlines is the most popular carrier operating from London to San Francisco

What airlines fly to San Francisco?

Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to San Francisco from London, Ontario according to our data. Air Canada is the first choice among our users, with 47% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 7 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from London Airport to San Francisco Airport?

Prices for flights from London Airport to San Francisco Airport are updated daily.

How many operators does momondo search for flights from London Airport to San Francisco Airport?

As of January 2026, there is 1 operator available to choose from for flights from London Airport to San Francisco Airport.

How old do you have to be to fly from London Airport to San Francisco Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Airport to San Francisco Airport.

What documentation or ID do you need to fly to San Francisco Airport?

The necessary travel and health documents for your San Francisco 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.

$274 Cheap Flights from London to San Francisco in 2026

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Find the cheapest flights from London, Ontario to San Francisco

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:15 am - 12:00 pm

YXU

SFO

8h 45m

1 stop

6:05 pm - 5:25 am

SFO

YXU

8h 20m

1 stop

$274WestJet

Sun, May 24 - Mon, Jun 8

2:35 pm - 9:55 pm

YXU

SFO

10h 20m

2 stops

6:05 pm - 5:25 am

SFO

YXU

8h 20m

1 stop

$290WestJet

Sun, May 24 - Mon, Jun 8

6:15 am - 12:00 pm

YXU

SFO

8h 45m

1 stop

6:05 pm - 5:25 am

SFO

YXU

8h 20m

1 stop

$298WestJet

Tue, May 26 - Tue, Jun 9

5:55 pm - 9:55 pm

YXU

SFO

31h 00m

1 stop

6:05 pm - 5:25 am

SFO

YXU

8h 20m

1 stop

$299WestJet

Mon, May 25 - Mon, Jun 8

6:15 am - 12:00 pm

YXU

SFO

8h 45m

1 stop

6:05 pm - 5:25 am

SFO

YXU

8h 20m

1 stop

$313WestJet

Sun, May 24 - Tue, Jun 9

2:35 pm - 9:55 pm

YXU

SFO

10h 20m

2 stops

6:05 pm - 5:25 am

SFO

YXU

8h 20m

1 stop

$314WestJet

Tue, May 26 - Tue, Jun 9

2:35 pm - 9:55 pm

YXU

SFO

10h 20m

2 stops

6:05 pm - 5:25 am

SFO

YXU

8h 20m

1 stop

$329WestJet

Sun, May 24 - Tue, Jun 9

5:55 pm - 9:55 pm

YXU

SFO

31h 00m

1 stop

6:00 am - 1:45 pm

SFO

YXU

28h 45m

2 stops

$341WestJet

Mon, May 25 - Mon, Jun 8

9:40 am - 9:39 pm

YXU

SFO

14h 59m

1 stop

4:20 pm - 8:46 am

SFO

YXU

13h 26m

1 stop

$351Air Canada

Sun, Mar 8 - Sat, Mar 14

9:40 am - 9:39 pm

YXU

SFO

14h 59m

1 stop

11:59 pm - 5:05 pm

SFO

YXU

14h 06m

2 stops

$368Air Canada

Sun, Mar 8 - Sat, Mar 14

Air Canada flights from London, Ontario to San Francisco

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

Air Canada

Mar 8

YXU9:40 amLondon

14h 59m

1 stop

SFO9:39 pmSan Francisco

Mar 14

SFO4:20 pmSan Francisco

13h 26m

1 stop

YXU8:46 amLondon

$351

Air Canada

Mar 8

YXU9:40 amLondon

14h 59m

1 stop

SFO9:39 pmSan Francisco

Mar 14

SFO11:59 pmSan Francisco

14h 06m

2 stops

YXU5:05 pmLondon

$368

Air Canada

Apr 25

YXU5:10 amLondon

8h 35m

1 stop

SFO10:45 amSan Francisco

May 3

SFO7:30 pmSan Francisco

13h 13m

2 stops

YXU11:43 amLondon

$397

United Airlines flights from London, Ontario to San Francisco

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

United Airlines

Feb 15

YXU5:10 amLondon

11h 57m

2 stops

SFO2:07 pmSan Francisco

Feb 23

SFO11:55 pmSan Francisco

14h 10m

2 stops

YXU5:05 pmLondon

$454

United Airlines

Mar 1

YXU5:40 pmLondon

10h 48m

2 stops

SFO1:28 amSan Francisco

Mar 4

SFO11:59 pmSan Francisco

14h 06m

2 stops

YXU5:05 pmLondon

$457

United Airlines

Mar 8

YXU5:40 pmLondon

10h 48m

2 stops

SFO1:28 amSan Francisco

Mar 14

SFO6:14 amSan Francisco

23h 32m

2 stops

YXU8:46 amLondon

$491

momondo Fare Finder

Use the filters below to find and compare flights from London, Ontario to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 5/24

6:15 am-12:00 pm

1 stop8h 45m

San Francisco

Mon 6/8

6:05 pm-5:25 am

1 stop8h 20m

$274

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 5/24

2:35 pm-9:55 pm

2 stops10h 20m

San Francisco

Mon 6/8

6:05 pm-5:25 am

1 stop8h 20m

$290

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 5/26

6:15 am-12:00 pm

1 stop8h 45m

San Francisco

Tue 6/9

6:05 pm-5:25 am

1 stop8h 20m

$298

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 5/25

5:55 pm-9:55 pm

1 stop31h 00m

San Francisco

Mon 6/8

6:05 pm-5:25 am

1 stop8h 20m

$299

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 5/24

6:15 am-12:00 pm

1 stop8h 45m

San Francisco

Tue 6/9

6:05 pm-5:25 am

1 stop8h 20m

$313

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 5/26

2:35 pm-9:55 pm

2 stops10h 20m

San Francisco

Tue 6/9

6:05 pm-5:25 am

1 stop8h 20m

$314

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 5/24

2:35 pm-9:55 pm

2 stops10h 20m

San Francisco

Tue 6/9

6:05 pm-5:25 am

1 stop8h 20m

$329

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 5/25

5:55 pm-9:55 pm

1 stop31h 00m

San Francisco

Mon 6/8

6:00 am-1:45 pm

2 stops28h 45m

$341

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 3/8

9:40 am-9:39 pm

1 stop14h 59m

San Francisco

Sat 3/14

4:20 pm-8:46 am

1 stop13h 26m

$351

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 3/8

9:40 am-9:39 pm

1 stop14h 59m

San Francisco

Sat 3/14

11:59 pm-5:05 pm

2 stops14h 06m

$368

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

How to get the cheapest flight ticket from London, Ontario to San Francisco

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

What is the cheapest month to fly to San Francisco?

If you aren’t able to travel to San Francisco during the month of August, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $265.

When to book flights from London, Ontario to San Francisco

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

Estimated round-trip price

Cheap London, Ontario to San Francisco (YXU to SFO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London, Ontario to San Francisco

Fastest flight time	8h 54m
Direct flights	None

The fastest flight from London, Ontario to San Francisco takes 8h 54m

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

Search flight deals

How far is London to San Francisco by plane?
The distance between London and San Francisco is about 2173.0 mi. Typically, this will take 8h 54m by plane in normal conditions.
When did momondo last update prices for flights from London Airport to San Francisco Airport?
Prices for flights from London Airport to San Francisco Airport are updated daily.
How many operators does momondo search for flights from London Airport to San Francisco Airport?
As of January 2026, there is 1 operator available to choose from for flights from London Airport to San Francisco Airport.
How old do you have to be to fly from London Airport to San Francisco Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Airport to San Francisco Airport.
What documentation or ID do you need to fly to San Francisco Airport?
The necessary travel and health documents for your San Francisco 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 London, Ontario to San Francisco?
Based on momondo bookings for this flight route, the most popular airline on flight routes from London, Ontario to San Francisco is Air Canada (100% of total bookings).

Best airlines flying from London, Ontario to San Francisco

Compare and see reviews for airlines that fly from London, Ontario to San Francisco with momondo

Airline	Rating	Free Cancellation	Price
Air Canada	PriceFrom $222	Free Cancellation	Rating 7.1 10,667 reviews		Search Air Canada flights

Santa Cruz

Carmel-by-the-Sea

Modesto

Sonoma

Bodega Bay

Roseville

Hayward

Calistoga

Big Sur

Santa Clara

Berkeley

Walnut Creek

Fremont

Daly City

Half Moon Bay

Salinas

Vallejo

Livermore

Sunnyvale

Turlock

Why use momondo?

Why should I use momondo to find a flight deal from London to San Francisco?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Francisco from London.

Can I find flights from London to San Francisco with flexible booking policies on momondo?

All flight searches from London to San Francisco on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from London to San Francisco?

Once all potential London to San Francisco flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from London to San Francisco right now. Can momondo alert me if prices change?

Yes. momondo can track prices for London to San Francisco flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.