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$189+ 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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SFO
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
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 julio 30, 2025.

Round-trip from

$286
(Mytrip)

One-way from

$189
(Mytrip)

Popular in

December

Cheapest in

May

Average price

$538
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. 24% potential increase in price ($134 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 30, 2025.

This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/106:00 amYXU - SFO
1 stop8h 54mWestJet
mar. 9/237:30 amSFO - YXU
1 stop8h 37mWestJet
Deal found 7/29$286
This Trip.com deal was found by Cheapflights users on 7/29. 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.
mié. 9/106:00 amYXU - SFO
1 stop8h 54mMultiple Airlines
mar. 9/2310:15 amSFO - YXU
3 stops15h 57mMultiple Airlines
Deal found 7/29$303
This Air Canada deal was found by Cheapflights users on 7/29. 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.
mié. 9/103:50 pmYXU - SFO
1 stop8h 03mAir Canada
mar. 9/234:35 pmSFO - YXU
2 stops13h 44mAir Canada
Deal found 7/29$304
This United Airlines deal was found by Cheapflights users on 7/29. 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.
jue. 12/45:45 amYXU - SFO
2 stops18h 20mUnited Airlines
mié. 3/410:40 pmSFO - YXU
2 stops19h 41mUnited Airlines
Deal found 7/29$524
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/296:00 amYXU - SFO
1 stop8h 56mDelta
vie. 9/57:30 amSFO - YXU
1 stop8h 37mDelta
Deal found 7/29$1,034

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 julio 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

mié. 9/10

6:00 am-11:54 am

1 stop8h 54m

San Francisco

mar. 9/23

7:30 am-7:07 pm

1 stop8h 37m

$286

LondonSan Francisco

YXU - SFO

YXUSFO

London

mié. 9/10

6:00 am-11:54 am

1 stop8h 54m

San Francisco

mar. 9/23

10:15 am-5:12 am

3 stops15h 57m

$303

LondonSan Francisco

YXU - SFO

YXUSFO

London

mié. 9/10

3:50 pm-8:53 pm

1 stop8h 03m

San Francisco

mar. 9/23

4:35 pm-9:19 am

2 stops13h 44m

$304

LondonSan Francisco

YXU - SFO

YXUSFO

London

jue. 12/4

5:45 am-9:05 pm

2 stops18h 20m

San Francisco

mié. 3/4

10:40 pm-9:21 pm

2 stops19h 41m

$524

LondonSan Francisco

YXU - SFO

YXUSFO

London

vie. 8/29

6:00 am-11:56 am

1 stop8h 56m

San Francisco

vie. 9/5

7:30 am-7:07 pm

1 stop8h 37m

$1,034

LondonSan Francisco

YXU - SFO

YXUSFO

London

sáb. 9/13

6:00 am-11:54 am

1 stop8h 54m

$189

LondonSan Francisco

YXU - SFO

YXUSFO

London

vie. 9/12

3:50 pm-8:53 pm

1 stop8h 03m

$207

LondonSan Francisco

YXU - SFO

YXUSFO

London

mié. 8/13

9:45 pm-9:30 am

1 stop14h 45m

$277

LondonSan Francisco

YXU - SFO

YXUSFO

London

vie. 9/12

6:00 am-11:29 pm

3 stops20h 29m

$280

LondonSan Francisco

YXU - SFO

YXUSFO

London

mié. 8/13

9:55 am-12:57 am

2 stops18h 02m

$377

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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 $358). 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.

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 julio 30, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and WestJet from London to San Francisco. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
WestJet
7.2
Good
2,975 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air Canada
7.1
Good
9,837 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Flair Airlines
6.0
Okay
247 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 $286, 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 32% 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 $189. However, be on the lookout for offers from Air Canada and Flair 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 $358). 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 San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Roseville
Mountain View
Santa Cruz
South San Francisco
Livermore
Turlock
Manteca
Antioch
Hollister
Watsonville
Sunnyvale
Newark
Milpitas
Campbell
Foster City
Capitola
Santa Clara
San Leandro
Burlingame
Redwood City

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Alternative routes for London to San Francisco

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Top airline flying from London to San Francisco

Discover the top airline that operate flights from London to San Francisco. 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 julio 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$222Average$268FlexibilityNo cancel feeOn-time67%

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