What’s the cheapest layover airport for flights from London, Ontario to San Francisco?

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 434.

Which airport typically offers the quickest layover for flights from London, Ontario to San Francisco?

Flights via Toronto (YYZ) offer the fastest connection on this route, with an average layover time of 1h 53m.

What’s the top layover airport for flights from London, Ontario to San Francisco?

Toronto (YYZ) – chosen by Cheapflights users on 64% of one-stop itineraries from London, Ontario to San Francisco on Cheapflights.

What’s the fastest layover option from London, Ontario to San Francisco?

Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 8h 12m.

How long is the flight from London, Ontario to San Francisco?

A quick flight from London, Ontario to San Francisco can take about 8h 50m. WestJet provides one of the quickest options available for as low as C$ 448. The distance between London, Ontario and San Francisco is about 3508 km.

What are the cheapest airlines flying from London, Ontario to San Francisco round-trip?

According to our current data, WestJet (C$ 220), and Air Canada (C$ 255) offers the cheapest pricing from London, Ontario to San Francisco. WestJet is 61% cheaper than the average price of flights available within the next 90 days to this destination.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 mm per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

What is the cheapest time of day to fly from YXU to SFO?

When flying from London, Ontario to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from London to San Francisco that include hotel bookings?

Yes. In addition to deals on London to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from London to San Francisco?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to San Francisco.

Can I find deals for business class flights from London to San Francisco?

Yes. Cheapflights offers flight deals from London to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 299+ Cheap Flights from London, ON to San Francisco

Q: How much does it cost to fly round-trip from London, Ontario to San Francisco?

Airfare is below average for this route at the moment. London, Ontario to San Francisco flights typically cost between C$ 483 and C$ 476 in May. The cheapest round-trip price found within the last 3 days was C$ 441 on WestJet (20 May-25 May).

Cheap flight deals from London to San Francisco

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from London to San Francisco
Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 April 2026.

Wed 20/56:10 a.m.

YXU

SFO

1 stop8h 50m

WestJet

Mon 25/56:05 p.m.

SFO

YXU

1 stop8h 15m

WestJet

Deal found 8/4C$ 441

Thu 21/56:10 a.m.

YXU

SFO

1 stop8h 50m

WestJet

Mon 25/56:05 p.m.

SFO

YXU

1 stop8h 15m

WestJet

Deal found 7/4C$ 448

Thu 8/106:10 a.m.

YXU

SFO

1 stop8h 50m

WestJet

Mon 19/106:00 a.m.

SFO

YXU

1 stop7h 45m

WestJet

Deal found 8/4C$ 455

Sun 10/56:10 a.m.

YXU

SFO

1 stop8h 50m

WestJet

Sat 16/56:00 a.m.

SFO

YXU

1 stop20h 20m

WestJet

Deal found 9/4C$ 484

Thu 2/76:10 a.m.

YXU

SFO

1 stop8h 50m

WestJet

Mon 6/76:05 p.m.

SFO

YXU

1 stop8h 15m

WestJet

Deal found 8/4C$ 491

Thu 4/66:10 a.m.

YXU

SFO

1 stop8h 50m

WestJet

Mon 8/66:05 p.m.

SFO

YXU

1 stop8h 15m

WestJet

Deal found 9/4C$ 507

Thu 9/76:10 a.m.

YXU

SFO

1 stop8h 50m

WestJet

Wed 29/76:00 a.m.

SFO

YXU

1 stop7h 45m

WestJet

Deal found 9/4C$ 545

Tue 26/56:10 a.m.

YXU

SFO

1 stop8h 50m

WestJet

Tue 2/66:00 a.m.

SFO

YXU

1 stop7h 45m

WestJet

Deal found 11/4C$ 552

Wed 29/46:10 a.m.

YXU

SFO

1 stop8h 50m

WestJet

Sat 2/51:00 p.m.

SFO

YXU

1 stop13h 20m

WestJet

Deal found 7/4C$ 563

Find flight deals from London to San Francisco

Round-trip from	C$ 441
One-way from	C$ 299
Popular in	March
Cheapest in	August
Average price	C$ 476

WestJet
20/5-25/5
2 total stops
17h 05m total
London to San Francisco

Search Deals

Air Canada
24/5
1 total stop
8h 40m total
London to San Francisco

Search Deals

Highest demand for flights based on searches. 28% potential increase in price (C$ 313 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 10% potential price decrease (C$ 77 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 21/5

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

1 stop8h 50m

San Francisco

Mon 25/5

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

1 stop8h 15m

C$ 448

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 10/5

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

1 stop8h 50m

San Francisco

Sat 16/5

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

1 stop20h 20m

C$ 484

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 4/6

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

1 stop8h 50m

San Francisco

Mon 8/6

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

1 stop8h 15m

C$ 507

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 26/5

2:40 p.m.-9:55 p.m.

2 stops10h 15m

San Francisco

Tue 2/6

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

1 stop8h 15m

C$ 559

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 29/4

5:10 a.m.-10:55 p.m.

2 stops20h 45m

San Francisco

Sat 2/5

5:30 a.m.-9:38 p.m.

2 stops13h 08m

C$ 606

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 4/6

9:30 a.m.-3:35 p.m.

1 stop9h 05m

San Francisco

Mon 8/6

7:56 p.m.-5:33 p.m.

2 stops18h 37m

C$ 613

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 4/6

9:30 a.m.-3:35 p.m.

1 stop9h 05m

San Francisco

Mon 8/6

7:56 p.m.-5:33 p.m.

2 stops18h 37m

C$ 621

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 23/5

5:10 a.m.-10:50 a.m.

1 stop8h 40m

San Francisco

Sat 30/5

6:15 a.m.-11:43 a.m.

2 stops26h 28m

C$ 648

Cheapest one-way

Quickest one-way

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 24/5

5:10 a.m.-10:50 a.m.

1 stop8h 40m

C$ 299

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 25/5

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

1 stop8h 50m

C$ 304

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/4

Showing 1-10 of 17 resultsSorted by cheapest first

Best time to book a flight from London to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from London with our price prediction graph.

YXU-SFO

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to San Francisco

Prices

What is the cheapest month to book a flight from London, Ontario to San Francisco?

Currently, August is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of C$ 220). Flying from London, Ontario to San Francisco in December is currently the most expensive (average of C$ 350). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from London, Ontario to San Francisco?

Reviews of airlines servicing San Francisco

Read through reviews of airlines operating flights from London to San Francisco, such as WestJet and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

WestJet

7.2

Good

3,320 reviews

Check prices

Reviews

1 / 20

6.0

Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight

WestJet

7.2

Good

3,320 reviews

WestJet

7.2

Good

3,320 reviews

Check prices

Reviews

1 / 20

6.0

Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight

Air Canada

7.1

Good

10,917 reviews

WestJet

7.2

Good

3,320 reviews

Check prices

Reviews

1 / 20

6.0

Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight

Related info for your journey

How long is the flight from London, Ontario to San Francisco?
A quick flight from London, Ontario to San Francisco can take about 8h 50m. WestJet provides one of the quickest options available for as low as C$ 448. The distance between London, Ontario and San Francisco is about 3508 km.
What are the cheapest airlines flying from London, Ontario to San Francisco round-trip?
According to our current data, WestJet (C$ 220), and Air Canada (C$ 255) offers the cheapest pricing from London, Ontario to San Francisco. WestJet is 61% cheaper than the average price of flights available within the next 90 days to this destination.
Can I find deals for flights from London to San Francisco that include hotel bookings?
Yes. In addition to deals on London to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from London to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to San Francisco.
Can I find deals for business class flights from London to San Francisco?
Yes. Cheapflights offers flight deals from London to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London, Ontario to San Francisco?
Currently, August is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of C$ 220). Flying from London, Ontario to San Francisco in December is currently the most expensive (average of C$ 350). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 2 airlines flying from London to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
WestJet	CheapestC$ 220	AverageC$ 423	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Air Canada	CheapestC$ 255	AverageC$ 481	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

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How does Cheapflights help users find flights from London to San Francisco?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from London to San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from London to San Francisco?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from London to San Francisco.

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Users can book flights with no change fees policies with our dedicated filters. Book flights from London to San Francisco flexibly with Cheapflights today.

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Cheap flights from London, ON to San Francisco from C$ 299

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from London to San Francisco

Cheapest flights from London to San FranciscoExplore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 April 2026.

Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 April 2026.

Best flights from London to San FranciscoDiscover carefully curated flight deals from London to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 12 April 2026.

Discover carefully curated flight deals from London to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 12 April 2026.

Last-minute flights from London to San FranciscoDiscover last-minute flight deals from London to San Francisco. Data last updated 12 April 2026 and is based on user searches.

Discover last-minute flight deals from London to San Francisco. Data last updated 12 April 2026 and is based on user searches.

One-way flights from London to San FranciscoSearch for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated 12 April 2026.

Search for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated 12 April 2026.

Find flight deals from London to San Francisco

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

Best time to book a flight from London to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from London with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London to San Francisco

What is the cheapest month to book a flight from London, Ontario to San Francisco?

How much does it cost to fly round-trip from London, Ontario to San Francisco?

What’s the top layover airport for flights from London, Ontario to San Francisco?

What’s the cheapest layover airport for flights from London, Ontario to San Francisco?

What’s the fastest layover option from London, Ontario to San Francisco?

Which airport typically offers the quickest layover for flights from London, Ontario to San Francisco?

Reviews of airlines servicing San Francisco

Read through reviews of airlines operating flights from London to San Francisco, such as WestJet and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from London to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from London, Ontario to San Francisco?

What are the cheapest airlines flying from London, Ontario to San Francisco round-trip?

Can I find deals for flights from London to San Francisco that include hotel bookings?

How can I find direct flights from London to San Francisco?

Can I find deals for business class flights from London to San Francisco?

What is the cheapest month to book a flight from London, Ontario to San Francisco?

Travelling to a place near San Francisco?

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Alternative routes for London to San Francisco

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Complete your trip

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Direct flights to California

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Search flights from London to San Francisco by cabin class

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London and San Francisco flights

Browse other London and San Francisco flight options. Last updated on 12 April 2026.

Other flights from London

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Other flights to San Francisco

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Top 2 airlines flying from London to San Francisco

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How does Cheapflights help users find flights from London to San Francisco?

Why should you use Cheapflights to find cheap flight tickets from London to San Francisco?

Can Cheapflights find flights from London to San Francisco with no change fees?

Can Cheapflights notify me if prices for flights from London to San Francisco become cheaper?

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Cheapest flights from London to San Francisco
Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 April 2026.

Best flights from London to San Francisco
Discover carefully curated flight deals from London to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 12 April 2026.

Last-minute flights from London to San Francisco
Discover last-minute flight deals from London to San Francisco. Data last updated 12 April 2026 and is based on user searches.

One-way flights from London to San Francisco
Search for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated 12 April 2026.