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

Air Canada, United Airlines, and WestJet are the most popular carriers 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 48% 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 September 2025, 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.

$186 Cheap Flights from London to San Francisco in 2025/26

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Find the cheapest flights from London, Ontario to San Francisco

Round-trip

One-way

Cheap round-trip flights

5:45 am - 2:56 pmYXU-SFO

12h 11m2 stops

8:49 am - 9:21 pmSFO-YXU

9h 32m1 stop

$384Air Canada

Find Deal

Thu, Feb 5 - Mon, Feb 9

9:25 am - 5:17 pmYXU-SFO

10h 52m2 stops

12:43 am - 5:05 pmSFO-YXU

13h 22m2 stops

$390United Airlines

Find Deal

Thu, Feb 5 - Sun, Feb 8

5:45 am - 10:54 amYXU-SFO

8h 09m1 stop

8:30 am - 9:21 pmSFO-YXU

9h 51m1 stop

$420United Airlines

Find Deal

Thu, Oct 30 - Thu, Nov 6

5:45 am - 12:12 amYXU-SFO

21h 27m2 stops

8:30 am - 9:21 pmSFO-YXU

9h 51m1 stop

$426United Airlines

Find Deal

Thu, Oct 30 - Thu, Nov 6

3:40 pm - 9:32 pmYXU-SFO

8h 52m1 stop

5:00 am - 9:17 amSFO-YXU

25h 17m2 stops

$453United Airlines

Find Deal

Sat, Oct 4 - Wed, Oct 8

6:15 am - 2:40 pmYXU-SFO

11h 25m2 stops

11:35 am - 9:17 amSFO-YXU

18h 42m2 stops

$458Multiple Airlines

Find Deal

Sat, Oct 4 - Wed, Oct 8

5:45 am - 9:05 pmYXU-SFO

18h 20m2 stops

5:00 am - 9:21 pmSFO-YXU

13h 21m2 stops

$484United Airlines

Find Deal

Thu, Oct 30 - Thu, Nov 6

5:45 am - 10:54 amYXU-SFO

8h 09m1 stop

12:43 am - 5:05 pmSFO-YXU

13h 22m2 stops

$504United Airlines

Find Deal

Thu, Oct 30 - Wed, Nov 5

5:45 am - 9:05 pmYXU-SFO

18h 20m2 stops

12:43 am - 5:05 pmSFO-YXU

13h 22m2 stops

$510United Airlines

Find Deal

Thu, Oct 30 - Wed, Nov 5

8:10 pm - 10:15 amYXU-SFO

17h 05m3 stops

3:30 pm - 6:35 amSFO-YXU

12h 05m2 stops

$557Multiple Airlines

Find Deal

Thu, Feb 5 - Mon, Feb 9

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 5

YXU9:25 amLondon

10h 52m

2 stops

SFO5:17 pmSan Francisco

Feb 8

SFO12:43 amSan Francisco

13h 22m

2 stops

YXU5:05 pmLondon

$390

Find similar

United Airlines

Oct 30

YXU5:45 amLondon

8h 09m

1 stop

SFO10:54 amSan Francisco

Nov 6

SFO8:30 amSan Francisco

9h 51m

1 stop

YXU9:21 pmLondon

$420

Find similar

United Airlines

Oct 30

YXU5:45 amLondon

21h 27m

2 stops

SFO12:12 amSan Francisco

Nov 6

SFO8:30 amSan Francisco

9h 51m

1 stop

YXU9:21 pmLondon

$426

Find similar

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

Thu 2/5

5:45 am-2:56 pm

2 stops12h 11m

San Francisco

Mon 2/9

8:49 am-9:21 pm

1 stop9h 32m

$384

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 2/5

9:25 am-5:17 pm

2 stops10h 52m

San Francisco

Sun 2/8

12:43 am-5:05 pm

2 stops13h 22m

$390

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 10/30

5:45 am-10:54 am

1 stop8h 09m

San Francisco

Thu 11/6

8:30 am-9:21 pm

1 stop9h 51m

$420

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 10/30

5:45 am-12:12 am

2 stops21h 27m

San Francisco

Thu 11/6

8:30 am-9:21 pm

1 stop9h 51m

$426

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 10/4

3:40 pm-9:32 pm

1 stop8h 52m

San Francisco

Wed 10/8

5:00 am-9:17 am

2 stops25h 17m

$453

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 10/4

6:15 am-2:40 pm

2 stops11h 25m

San Francisco

Wed 10/8

11:35 am-9:17 am

2 stops18h 42m

$458

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 10/30

5:45 am-9:05 pm

2 stops18h 20m

San Francisco

Thu 11/6

5:00 am-9:21 pm

2 stops13h 21m

$484

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 10/30

5:45 am-10:54 am

1 stop8h 09m

San Francisco

Wed 11/5

12:43 am-5:05 pm

2 stops13h 22m

$504

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 10/30

5:45 am-9:05 pm

2 stops18h 20m

San Francisco

Wed 11/5

12:43 am-5:05 pm

2 stops13h 22m

$510

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 2/5

8:10 pm-10:15 am

3 stops17h 05m

San Francisco

Mon 2/9

3:30 pm-6:35 am

2 stops12h 05m

$557

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 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 $267.

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

Direct flights	None

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 09m 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 September 2025, 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 10,000 reviews		Search Air Canada flights

Santa Cruz

Carmel-by-the-Sea

Modesto

Sonoma

Calistoga

Bodega Bay

Roseville

Hayward

Big Sur

Santa Clara

Daly City

Fremont

Berkeley

Half Moon Bay

Walnut Creek

Vallejo

Redwood City

Salinas

South San Francisco

Fairfield

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.

An easier way to manage your San Francisco trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from London, Ontario to San Francisco from $186

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London, Ontario to San Francisco departing on 10/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from London, Ontario to San Francisco

Cheap round-trip flights

Cheap one-way flights

United Airlines flights from London, Ontario to San Francisco

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

momondo Fare Finder

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

See travel insights to San Francisco from

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

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 $267.

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

Air Canada, United Airlines, and WestJet are the most popular carriers operating from London to San Francisco

What airlines fly to San Francisco?

When to book flights from London, Ontario to San Francisco

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

Direct flights

How far is London to San Francisco by plane?

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

How many operators does momondo search 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?

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

What is the most popular airline from London, Ontario to San Francisco?

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

Traveling to a place near San Francisco?

Why use momondo?

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

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

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

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

An easier way to manage your San Francisco trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing California