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$140+ Cheap flights from San Francisco (SFO) to London, ON (YXU)

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 5/24. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YXU
Feb 4 — Feb 111
Tue 2/4
Tue 2/11
1 adult, Economy
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Cheap flight deals from San Francisco to London

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to London (YXU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$308
(Air Canada)

One-way from

$140
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$192
Provider with most accurate pricing for San Francisco-London flight deals.
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Provider most trusted by Cheapflights users for San Francisco-London flights.
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From San Francisco to London
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One-way flight from San Francisco to London
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Highest demand for flights based on searches. 2% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Find flight deals from San Francisco to London

Cheapest flights from San Francisco to London
Explore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 30, 2025.

This Air Canada deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/68:25 amSFO - YXU
1 stop8h 55mAir Canada
Sat 3/153:20 pmYXU - SFO
1 stop9h 22mAir Canada
Deal found 1/30$308
This United Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/138:53 amSFO - YXU
1 stop8h 27mUnited Airlines
Sun 3/25:15 amYXU - SFO
1 stop8h 37mUnited Airlines
Deal found 1/30$317
This Justfly.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/131:55 pmSFO - YXU
1 stop26h 18mMultiple Airlines
Sun 3/235:15 amYXU - SFO
1 stop8h 37mMultiple Airlines
Deal found 1/30$348
This FlightHub deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/131:55 pmSFO - YXU
1 stop26h 18mWestJet
Mon 3/248:00 pmYXU - SFO
1 stop20h 06mWestJet
Deal found 1/30$446

Find flights from San Francisco to London within your budget

Customize your flight search to find flights from San Francisco to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 3/6

8:25 am-8:20 pm

1 stop8h 55m

London

Sat 3/15

3:20 pm-9:42 pm

1 stop9h 22m

$308

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 2/13

8:53 am-8:20 pm

1 stop8h 27m

London

Fri 2/28

3:25 pm-9:00 pm

1 stop8h 35m

$317

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 3/13

1:55 pm-7:13 pm

1 stop26h 18m

London

Sun 3/23

5:15 am-10:52 am

1 stop8h 37m

$348

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 3/13

1:55 pm-7:13 pm

1 stop26h 18m

London

Mon 3/24

8:00 pm-1:06 pm

1 stop20h 06m

$446

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 5/24

11:15 pm-2:58 pm

2 stops12h 43m

$140

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 5/24

11:00 pm-2:58 pm

1 stop12h 58m

$154

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 5/23

2:51 pm-5:14 am

2 stops11h 23m

$318

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 5/23

5:45 am-5:14 am

3 stops20h 29m

$370

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

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

Have a flexible travel schedule? Discover the best time to fly to London from San Francisco 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 San Francisco to London

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

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

Find hourly flight availability from San Francisco to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 30, 2025.

One of the essential ways to save on airfare from San Francisco to London, Ontario is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 39% on airfare.

Rainfall in London by month

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

In terms of precipitation, rainfall in London, Ontario ranges from 2.8 - 3.9 inches per month. January is typically the wettest month, when rainfall can reach 3.9 in. March is typically the driest time to visit London, Ontario when rainfall is around 2.8 in.

Temperature in London by month

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

If weather is an important factor for your trip to London, Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 21.2 F).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated January 30, 2025.
United Airlines
7.4
Good
8,906 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Food

6.7

Reviews

1 / 20

6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.

United Airlines
7.4
Good
8,906 reviews
United Airlines
7.4
Good
8,906 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Food

6.7

Reviews

1 / 20

6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.

WestJet
7.2
Good
2,817 reviews
United Airlines
7.4
Good
8,906 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Food

6.7

Reviews

1 / 20

6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.

Air Canada
7.0
Good
8,641 reviews
United Airlines
7.4
Good
8,906 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Food

6.7

Reviews

1 / 20

6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to London. 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 San Francisco to London, Ontario round-trip?

    Air Canada, at $308, was found to be the cheapest airline from San Francisco to London, Ontario.Alternate airlines to your destination round-trip include United Airlines and WestJet. These flights start at 38% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from San Francisco to London, Ontario one-way?

    One-way options have recently been found by users for as low as $140 on United Airlines. Other airlines that offer cheap prices include Air Canada from $154 and WestJet from $370 one-way.

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

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

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

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

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

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

See more FAQs

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Top 3 airlines flying from San Francisco to London

Discover the top 3 airlines that operate flights from San Francisco to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$186Average$503FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$192Average$809FlexibilityNo cancel feeOn-time67%
WestJetCheapest$306Average$501FlexibilityNo cancel feeOn-time60%
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