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

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

Which layover airport offers the lowest fares from London, Ontario to San Francisco?

Flights via Calgary (YYC) offer the lowest average round-trip price of C$ 315.

Which layover airport has the shortest connection time from London, Ontario to San Francisco?

Toronto (YYZ) has the shortest average layover time for this route: 1h 23m.

Which airlines fly to San Francisco?

Porter Airlines, Air Canada and United Airlines are the top three most popular airlines that fly to San Francisco from London, Ontario according to our data. Porter Airlines is the first choice among our users, with 45% of people opting to fly with this airline when travelling to San Francisco. Keep in mind that there are 8 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest travel time from London, Ontario to San Francisco?

Flights connecting via Toronto (YYZ) have the shortest average one-way travel time: 7h 38m.

Which airport is the most popular layover for flights between London, Ontario and San Francisco?

Calgary (YYC) was the most common stop: 50% of momondo users choosing one-stop flights on this route connected there.

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 were last updated today.

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

The number of operators available for flights from London Airport to San Francisco Airport is 2 as of August 2026.

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 offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify 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.

C$ 304 Cheap Flights from London, Ontario to San Francisco in 2026

Discover deals from 900+ travel sites with momondo.

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.

6:10 a.m. - 12:00 p.m.YXU London-SFO San Francisco

8h 50m1 stop Calgary

6:00 a.m. - 5:20 a.m.SFO San Francisco-YXU London

20h 20m1 stop Calgary

C$ 513WestJet

Thu, 8 Oct - Tue, 13 Oct

6:10 a.m. - 9:55 p.m.YXU London-SFO San Francisco

18h 45m1 stop Calgary

6:00 a.m. - 4:45 p.m.SFO San Francisco-YXU London

7h 45m1 stop Calgary

C$ 525WestJet

Sun, 27 Sep - Sun, 4 Oct

3:30 p.m. - 9:49 p.m.YXU London-SFO San Francisco

9h 19m1 stop Toronto Pearson Intl

10:45 p.m. - 9:20 a.m.SFO San Francisco-YXU London

7h 35m1 stop Toronto Pearson Intl

C$ 535Air Canada

Tue, 8 Sep - Mon, 14 Sep

6:10 a.m. - 12:00 p.m.YXU London-SFO San Francisco

8h 50m1 stop Calgary

6:00 a.m. - 5:20 a.m.SFO San Francisco-YXU London

20h 20m1 stop Calgary

C$ 538WestJet

Thu, 10 Sep - Sun, 13 Sep

6:10 a.m. - 4:40 p.m.YXU London-SFO San Francisco

13h 30m1 stop Calgary

6:05 p.m. - 5:20 a.m.SFO San Francisco-YXU London

8h 15m1 stop Calgary

C$ 545WestJet

Wed, 2 Sep - Wed, 9 Sep

10:05 a.m. - 3:24 p.m.YXU London-SFO San Francisco

8h 19m1 stop Toronto Pearson Intl

8:10 a.m. - 9:40 p.m.SFO San Francisco-YXU London

10h 30m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl

C$ 557Air Canada

Sat, 12 Sep - Sat, 19 Sep

5:30 a.m. - 11:05 a.m.YXU London-SFO San Francisco

8h 35m1 stop Toronto Pearson Intl

9:00 a.m. - 9:47 p.m.SFO San Francisco-YXU London

9h 47m2 stops Vancouver Intl Toronto Pearson Intl

C$ 559Air Canada

Tue, 8 Dec - Tue, 15 Dec

6:10 a.m. - 8:55 a.m.YXU London-SFO San Francisco

29h 45m2 stops Calgary Vancouver Intl

6:00 a.m. - 5:20 a.m.SFO San Francisco-YXU London

20h 20m1 stop Calgary

C$ 699Multiple Airlines

Sat, 10 Oct - Sun, 18 Oct

6:10 a.m. - 8:55 a.m.YXU London-SFO San Francisco

29h 45m2 stops Calgary Vancouver Intl

1:00 p.m. - 5:20 a.m.SFO San Francisco-YXU London

13h 20m1 stop Calgary

C$ 701Multiple Airlines

Sat, 10 Oct - Sat, 17 Oct

5:40 a.m. - 12:32 p.m.YXU London-SFO San Francisco

9h 52m1 stop Toronto Pearson Intl

11:59 p.m. - 5:45 p.m.SFO San Francisco-YXU London

14h 46m2 stops Houston George Bush Intcntl Toronto Pearson Intl

C$ 762United Airlines

Wed, 2 Sep - Sat, 5 Sep

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United Airlines flights from London, Ontario to San Francisco

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

United Airlines

2 Sep

YXU5:40 a.m.London

9h 52m

1 stop

SFO12:32 p.m.San Francisco

5 Sep

SFO11:59 p.m.San Francisco

14h 46m

2 stops

YXU5:45 p.m.London

C$ 762

United Airlines

24 Sep

YXU10:05 a.m.London

8h 19m

1 stop

SFO3:24 p.m.San Francisco

30 Sep

SFO12:45 a.m.San Francisco

14h 00m

2 stops

YXU5:45 p.m.London

C$ 765

United Airlines

2 Sep

YXU3:30 p.m.London

11h 46m

2 stops

SFO12:16 a.m.San Francisco

5 Sep

SFO11:59 p.m.San Francisco

14h 46m

2 stops

YXU5:45 p.m.London

C$ 770

Air Canada flights from London, Ontario to San Francisco

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

Air Canada

8 Sep

YXU3:30 p.m.London

9h 19m

1 stop

SFO9:49 p.m.San Francisco

14 Sep

SFO10:45 p.m.San Francisco

7h 35m

1 stop

YXU9:20 a.m.London

C$ 535

Air Canada

12 Sep

YXU10:05 a.m.London

8h 19m

1 stop

SFO3:24 p.m.San Francisco

19 Sep

SFO8:10 a.m.San Francisco

10h 30m

2 stops

YXU9:40 p.m.London

C$ 557

Air Canada

8 Dec

YXU5:30 a.m.London

8h 35m

1 stop

SFO11:05 a.m.San Francisco

15 Dec

SFO9:00 a.m.San Francisco

9h 47m

2 stops

YXU9:47 p.m.London

C$ 559

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

Cheapest round-trip

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Thu 8/10

6:10 a.m.-12:00 p.m.

1 stop8h 50m

San Francisco

Tue 13/10

6:00 a.m.-5:20 a.m.

1 stop20h 20m

C$ 513

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sun 27/9

6:10 a.m.-9:55 p.m.

1 stop18h 45m

San Francisco

Sun 4/10

6:00 a.m.-4:45 p.m.

1 stop7h 45m

C$ 525

Quickest round-trip

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Tue 8/9

3:30 p.m.-9:49 p.m.

1 stop9h 19m

San Francisco

Mon 14/9

10:45 p.m.-9:20 a.m.

1 stop7h 35m

C$ 535

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Thu 10/9

6:10 a.m.-12:00 p.m.

1 stop8h 50m

San Francisco

Sun 13/9

6:00 a.m.-5:20 a.m.

1 stop20h 20m

C$ 538

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Wed 2/9

6:10 a.m.-4:40 p.m.

1 stop13h 30m

San Francisco

Wed 9/9

6:05 p.m.-5:20 a.m.

1 stop8h 15m

C$ 545

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sat 12/9

10:05 a.m.-3:24 p.m.

1 stop8h 19m

San Francisco

Sat 19/9

8:10 a.m.-9:40 p.m.

2 stops10h 30m

C$ 557

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Tue 8/12

5:30 a.m.-11:05 a.m.

1 stop8h 35m

San Francisco

Tue 15/12

9:00 a.m.-9:47 p.m.

2 stops9h 47m

C$ 559

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sat 10/10

6:10 a.m.-8:55 a.m.

2 stops29h 45m

San Francisco

Sun 18/10

6:00 a.m.-5:20 a.m.

1 stop20h 20m

C$ 699

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sat 10/10

6:10 a.m.-8:55 a.m.

2 stops29h 45m

San Francisco

Sat 17/10

1:00 p.m.-5:20 a.m.

1 stop13h 20m

C$ 701

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Wed 2/9

5:40 a.m.-12:32 p.m.

1 stop9h 52m

San Francisco

Sat 5/9

11:59 p.m.-5:45 p.m.

2 stops14h 46m

C$ 762

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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

Layovers

What is the typical price of a round-trip flight between London, Ontario and San Francisco?

Prices are currently high for flights on this route.

Typical prices usually range from C$ 244 to C$ 308.
The lowest price recently found on this route was C$ 525.

What is the cheapest month to fly to San Francisco?

The cheapest month to fly to San Francisco from London, Ontario is in February. Flight prices, which tend to average around C$ 0, are often lower during this time because this is during the off-season. The month of August is another great option to travel to San Francisco, with average flight prices from London, Ontario averaging around C$ 258.

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	9h 29m
Direct flights	None

The fastest flight from London, Ontario to San Francisco takes 9h 29m

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

Frequently asked questions about flying from London, Ontario to San Francisco

How far is London to San Francisco by plane?
San Francisco is 3496.6 km away from London. In terms of flight time, this usually takes a little over 9h 29m.
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 were last updated today.
How many operators does momondo search for flights from London Airport to San Francisco Airport?
The number of operators available for flights from London Airport to San Francisco Airport is 2 as of August 2026.
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 offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify 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?
momondo data reveals that the most frequently booked airline on the route from London, Ontario to San Francisco is Air Canada, representing 54% of all bookings. The subsequent popular airline is WestJet at 46%.

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
WestJet	PriceFrom C$ 222	Free Cancellation	Rating 7.2 3,433 reviews		Search WestJet flights
Air Canada	PriceFrom C$ 257	Free Cancellation	Rating 7.1 11,466 reviews		Search Air Canada flights

Sonoma

San Mateo

Lodi

South San Francisco

Santa Cruz

Pacific Grove

Fremont

Alameda

Palo Alto

Milpitas

Belmont

Turlock

Carmel-by-the-Sea

Pleasant Hill

Mountain View

Cupertino

Burlingame

Santa Clara

Pacifica

Woodland

Why use momondo?

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

It is quick and easy to find London to San Francisco flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Francisco that suits you.

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

Yes. All flights to San Francisco from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Francisco from London.

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

Price alerts on flights to San Francisco from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your San Francisco trip

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Cheap flights from London, Ontario to San Francisco from C$ 304

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 9/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from London, Ontario to San Francisco

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United Airlines flights from London, Ontario to San Francisco

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

Air Canada flights from London, Ontario to San Francisco

Our best Air Canada 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

What is the typical price of a round-trip flight between London, Ontario and San Francisco?

What is the cheapest month to fly to San Francisco?

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

Which airlines fly to San Francisco?

Which airport is the most popular layover for flights between London, Ontario and San Francisco?

Which layover airport offers the lowest fares from London, Ontario to San Francisco?

Which layover airport has the shortest travel time from London, Ontario to San Francisco?

Which layover airport has the shortest connection time from London, Ontario 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

Fastest flight time

Direct flights

Frequently asked questions about flying 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

Travelling to a place near San Francisco?

Why use momondo?

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

Fly your favourite airline to San Francisco

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to San Francisco

List of cabin classes available on flights landing in San Francisco. Availability may vary depending on flight origin and airline.

Popular Cities in the United States

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from London, Ontario

According to popular flight searches on momondo this year

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