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

Air Canada, at $267, was found to be the cheapest airline from London, Ontario to San Francisco.Alternate airlines to your destination round-trip include United Airlines and WestJet. Air Canada is currently priced 49% below the average price you’ll pay for this route.

What is the cheapest day to fly from London, Ontario to San Francisco?

Travelers seeking maximum savings on their London, Ontario to San Francisco flight should consider departing on Friday afternoons when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest month to fly from London, Ontario to San Francisco?

Flights from London, Ontario to San Francisco lean towards being more expensive in April. Prices are generally better when you fly from London, Ontario to San Francisco in March, with the cheapest ticket starting at $246.

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.

Most accurate provider : When it comes to deals on London, Ontario-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London, Ontario-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London, Ontario-San Francisco flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on London, Ontario-San Francisco flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London, Ontario-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$144+ Save on Flights from London, ON to San Francisco

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Cheap flight deals from London to San Francisco

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$267 (Air Canada)
One-way from	$144 (Air Canada)
Popular in	April
Cheapest in	March
Average price	$592

Provider with most accurate pricing for London-San Francisco flight deals.

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Provider most trusted by Cheapflights users for London-San Francisco flights.

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From London to San Francisco

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One-way flight from London to San Francisco

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Highest demand for flights based on searches. 4% potential increase in price ($24 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($25 potential savings vs. average RT price).

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Average for round-trip flights in February 2025

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Find flight deals from London to San Francisco

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 February 20, 2025.

Fri 4/253:25 pmYXU - SFO

1 stop7h 42mAir Canada

Tue 4/298:30 amSFO - YXU

1 stop8h 49mAir Canada

Deal found 2/20

$267

Fri 4/255:15 amYXU - SFO

1 stop8h 22mUnited Airlines

Mon 4/2812:08 amSFO - YXU

2 stops11h 40mUnited Airlines

Deal found 2/20

$278

Thu 8/146:00 amYXU - SFO

2 stops10h 59mWestJet

Mon 8/182:45 pmSFO - YXU

2 stops11h 29mWestJet

Deal found 2/19

$312

Fri 4/258:00 pmYXU - SFO

2 stops16h 30mMultiple Airlines

Tue 4/2910:15 amSFO - YXU

3 stops29h 54mMultiple Airlines

Deal found 2/20

$804

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 February 20, 2025.

Fri 4/253:25 pmYXU - SFO

1 stop7h 42mAir Canada

Tue 4/298:30 amSFO - YXU

1 stop8h 49mAir Canada

Deal found 2/20

$267

Fri 4/255:15 amYXU - SFO

1 stop8h 22mUnited Airlines

Mon 4/2812:08 amSFO - YXU

2 stops11h 40mUnited Airlines

Deal found 2/20

$278

Thu 8/146:00 amYXU - SFO

2 stops10h 59mWestJet

Mon 8/182:45 pmSFO - YXU

2 stops11h 29mWestJet

Deal found 2/19

$312

Fri 4/258:00 pmYXU - SFO

2 stops16h 30mMultiple Airlines

Tue 4/2910:15 amSFO - YXU

3 stops29h 54mMultiple Airlines

Deal found 2/20

$804

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 February 20, 2025.

Mon 3/313:20 pmYXU - SFO

1 stop9h 29mAir Canada

Deal found 2/19

$144

Wed 4/165:15 amYXU - SFO

2 stops17h 17mUnited Airlines

Deal found 2/20

$166

Mon 3/318:00 pmYXU - SFO

3 stops21h 42mMultiple Airlines

Deal found 2/19

$343

Find flights from London to San Francisco within your budget

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 4/25

3:25 pm-8:07 pm

1 stop7h 42m

San Francisco

Tue 4/29

8:30 am-8:19 pm

1 stop8h 49m

$267

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 4/25

5:15 am-10:37 am

1 stop8h 22m

San Francisco

Mon 4/28

12:08 am-2:48 pm

2 stops11h 40m

$278

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 8/14

6:00 am-1:59 pm

2 stops10h 59m

San Francisco

Mon 8/18

2:45 pm-5:14 am

2 stops11h 29m

$312

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 4/25

8:00 pm-9:30 am

2 stops16h 30m

San Francisco

Tue 4/29

10:15 am-7:09 pm

3 stops29h 54m

$804

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 3/31

3:20 pm-9:49 pm

1 stop9h 29m

$144

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 4/16

5:15 am-7:32 pm

2 stops17h 17m

$166

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 3/31

8:00 pm-2:42 pm

3 stops21h 42m

$343

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Most accurate provider: When it comes to deals on London, Ontario-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London, Ontario-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London, Ontario-San Francisco flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on London, Ontario-San Francisco flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London, Ontario-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

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.

Travel insights for flights from London to San Francisco

Get recent, data-driven insights about flights from London to San Francisco including ideal travel times, pricing trends, and more.

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

Currently, January is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of $276). Flying from London, Ontario to San Francisco in June is currently the most expensive (average of $403). 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.

Rainfall in San Francisco by month

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

Temperature in San Francisco by month

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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Francisco

United Airlines

7.4

Good

8,765 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

United Airlines

7.4

Good

8,765 reviews

United Airlines

7.4

Good

8,765 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

WestJet

7.2

Good

2,801 reviews

United Airlines

7.4

Good

8,765 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

Air Canada

7.0

Good

8,748 reviews

United Airlines

7.4

Good

8,765 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

Related info for your journey

What are the cheapest airlines flying from London, Ontario to San Francisco round-trip?
Air Canada, at $267, was found to be the cheapest airline from London, Ontario to San Francisco.Alternate airlines to your destination round-trip include United Airlines and WestJet. Air Canada is currently priced 49% below the average price you’ll pay for this route.
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, January is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of $276). Flying from London, Ontario to San Francisco in June is currently the most expensive (average of $403). 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

Roseville

Mountain View

Turlock

Santa Cruz

Fairfield

Manteca

Sausalito

Watsonville

Hayward

Richmond

Hollister

South San Francisco

Antioch

Milpitas

Vallejo

Newark

Alameda

Campbell

Pacific Grove

Sunnyvale

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$144+ Cheap flights from London, ON (YXU) to San Francisco (SFO)

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 3/31. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from London to San Francisco with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from London to San Francisco

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 February 20, 2025.

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 February 20, 2025.

Find flights from London to San Francisco within your budget

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.

Travel insights for flights from London to San Francisco

Get recent, data-driven insights about flights from London to San Francisco including ideal travel times, pricing trends, and more.

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

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

Reviews of airlines servicing San Francisco

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.

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?

Traveling to a place near London?

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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 February 20, 2025.