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$154+ 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 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SFO
may. 5 — may. 121
lun. 5/5
lun. 5/12
1 adult, Economy
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Cheap flight deals from London to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from London (YXU) to San Francisco (SFO). 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 abril 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$284
(Trip.com)

One-way from

$154
(Trip.com)

Popular in

December

Cheapest in

June

Average price

$459
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
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($123 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in April 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 abril 30, 2025.

This Trip.com deal was found by Cheapflights users on 4/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/286:00 amYXU - SFO
1 stop8h 56mWestJet
mar. 9/22:45 pmSFO - YXU
2 stops11h 27mWestJet
Deal found 4/28$284
This Gotogate deal was found by Cheapflights users on 4/28. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/126:15 amYXU - SFO
1 stop7h 57mAir Canada
jue. 6/194:50 pmSFO - YXU
1 stop13h 27mAir Canada
Deal found 4/28$351
This Trip.com deal was found by Cheapflights users on 4/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 7/79:45 pmYXU - SFO
2 stops41h 20mMultiple Airlines
jue. 7/106:05 pmSFO - YXU
1 stop8h 09mMultiple Airlines
Deal found 4/28$377
This United Airlines deal was found by Cheapflights users on 4/28. 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.
lun. 7/76:15 amYXU - SFO
2 stops20h 06mUnited Airlines
jue. 7/1011:59 pmSFO - YXU
2 stops11h 58mUnited Airlines
Deal found 4/28$386

Cheapflights Fare Finder

Customize your flight search to find flights from London to San Francisco 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 abril 30, 2025.
Use the filters below to find and compare flights from London to San Francisco that are best for you.

Fly from

London

Fly to

San Francisco

Route

Depart

Return

Price

LondonSan Francisco

YXU - SFO

YXUSFO

London

jue. 8/28

6:00 am-11:56 am

1 stop8h 56m

San Francisco

mar. 9/2

2:45 pm-5:12 am

2 stops11h 27m

$284

LondonSan Francisco

YXU - SFO

YXUSFO

London

jue. 6/12

6:15 am-11:12 am

1 stop7h 57m

San Francisco

jue. 6/19

4:50 pm-9:17 am

1 stop13h 27m

$351

LondonSan Francisco

YXU - SFO

YXUSFO

London

lun. 7/7

9:45 pm-12:05 pm

2 stops41h 20m

San Francisco

jue. 7/10

6:05 pm-5:14 am

1 stop8h 09m

$377

LondonSan Francisco

YXU - SFO

YXUSFO

London

lun. 7/7

6:15 am-11:21 pm

2 stops20h 06m

San Francisco

jue. 7/10

11:59 pm-2:57 pm

2 stops11h 58m

$386

LondonSan Francisco

YXU - SFO

YXUSFO

London

dom. 5/25

6:00 am-1:59 pm

2 stops10h 59m

$154

LondonSan Francisco

YXU - SFO

YXUSFO

London

lun. 5/19

9:55 am-8:10 pm

2 stops13h 15m

$175

LondonSan Francisco

YXU - SFO

YXUSFO

London

lun. 7/7

9:45 pm-9:21 pm

3 stops26h 36m

$252

LondonSan Francisco

YXU - SFO

YXUSFO

London

lun. 7/7

6:15 am-11:21 pm

2 stops20h 06m

$259

LondonSan Francisco

YXU - SFO

YXUSFO

London

lun. 7/7

9:45 pm-9:30 am

1 stop14h 45m

$305

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Compare providers for flights from London to San Francisco

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to San Francisco in April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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 eDreams the most. eDreams 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.

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?

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 $393). 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

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

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

Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated abril 30, 2025.
United Airlines
7.4
Good
8,696 reviews

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,696 reviews
United Airlines
7.4
Good
8,696 reviews

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
WestJet
7.2
Good
2,826 reviews
United Airlines
7.4
Good
8,696 reviews

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Air Canada
7.0
Good
9,242 reviews
United Airlines
7.4
Good
8,696 reviews

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Flair Airlines
6.0
Okay
239 reviews
United Airlines
7.4
Good
8,696 reviews

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

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?

    WestJet, at $284, was found to be the cheapest airline from London, Ontario to San Francisco.Alternate airlines to your destination round-trip include Air Canada and United Airlines. WestJet is currently priced 34% below the average price you’ll pay for this route.

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

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $154. However, be on the lookout for offers from Air Canada and United Airlines, as they are both options that can get you from London, Ontario to San Francisco for a low price.

  • 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 $393). 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

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Roseville
Mountain View
Santa Cruz
Livermore
South San Francisco
Turlock
Manteca
Fairfield
Richmond
Watsonville
Hollister
Newark
Milpitas
Antioch
Sausalito
Hayward
Alameda
Sunnyvale
Campbell
Daly City

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