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Cheap flights from London, ON to San Francisco from C$ 202

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 17/8. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SFO
8 Jul — 15 Jul1
1 adult

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 3 July 2025.

Round-trip from

C$ 380

One-way from

C$ 202

Popular in

December

Cheapest in

May

Average price

C$ 611
WestJet
  • WestJet
  • 16/8-23/8
  • 3 total stops
  • 20h 25m total
  • London to San Francisco
WestJet
  • WestJet
  • 17/8
  • 1 total stop
  • 8h 56m total
  • London to San Francisco
Highest demand for flights based on searches. 23% potential increase in price (C$ 241 potential increase over avg. RT price).
Cheapest flight prices on average. 5% potential price decrease (C$ 40 potential savings vs. average RT price).
Average for round-trip flights in July 2025

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 3 July 2025.

Sat 16/86:00 a.m.YXU - SFO
1 stop8h 56mWestJet
Sat 23/82:45 p.m.SFO - YXU
2 stops11h 29mWestJet
Deal found 2/7C$ 380
Wed 10/129:25 a.m.YXU - SFO
1 stop8h 50mAir Canada
Wed 7/16:00 p.m.SFO - YXU
2 stops11h 46mAir Canada
Deal found 2/7C$ 442
Sat 11/106:00 a.m.YXU - SFO
1 stop8h 54mDelta
Fri 17/107:30 a.m.SFO - YXU
1 stop8h 37mDelta
Deal found 1/7C$ 546
Sun 14/125:45 a.m.YXU - SFO
1 stop8h 14mUnited Airlines
Wed 31/1212:32 a.m.SFO - YXU
2 stops13h 34mUnited Airlines
Deal found 2/7C$ 557
Sat 16/86:00 a.m.YXU - SFO
2 stops10h 59mMultiple Airlines
Sat 23/810:15 a.m.SFO - YXU
3 stops15h 59mMultiple Airlines
Deal found 2/7C$ 635

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 629,999 searches. Data last updated 3 July 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

Sat 16/8

6:00 a.m.-11:56 a.m.

1 stop8h 56m

San Francisco

Sat 23/8

2:45 p.m.-5:14 a.m.

2 stops11h 29m

C$ 380

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 10/12

9:25 a.m.-3:15 p.m.

1 stop8h 50m

San Francisco

Wed 7/1

6:00 p.m.-8:46 a.m.

2 stops11h 46m

C$ 442

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 11/10

6:00 a.m.-11:54 a.m.

1 stop8h 54m

San Francisco

Fri 17/10

7:30 a.m.-7:07 p.m.

1 stop8h 37m

C$ 546

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 14/12

5:45 a.m.-10:59 a.m.

1 stop8h 14m

San Francisco

Wed 31/12

12:32 a.m.-5:06 p.m.

2 stops13h 34m

C$ 557

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 16/8

6:00 a.m.-1:59 p.m.

2 stops10h 59m

San Francisco

Sat 23/8

10:15 a.m.-5:14 a.m.

3 stops15h 59m

C$ 635

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 17/8

6:00 a.m.-11:56 a.m.

1 stop8h 56m

C$ 202

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 15/8

9:45 p.m.-9:25 p.m.

3 stops26h 40m

C$ 371

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 16/8

6:15 a.m.-10:38 p.m.

3 stops19h 23m

C$ 2,884

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/7

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 C$ 276). Flying from London, Ontario to San Francisco in December is currently the most expensive (average of C$ 368). 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.

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

Find hourly flight availability from London to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 July 2025.

When flying from London, Ontario to San Francisco, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 20% versus a flight in the afternoon.

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 3 July 2025.
Read through reviews of airlines operating flights from London to San Francisco, such as Delta,United Airlines, andWestJet. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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
8.0
Very good

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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?

    According to our current data, WestJet (C$ 380), Air Canada (C$ 442), and Delta (C$ 546) offers the cheapest pricing from London, Ontario to San Francisco. WestJet is 34% 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, January is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of C$ 276). Flying from London, Ontario to San Francisco in December is currently the most expensive (average of C$ 368). 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Richmond
San Ramon
Newark
Alameda
Redwood City
Burlingame
San Bruno
South San Francisco
Scotts Valley
Novato
Belmont
Millbrae
Santa Clara
Vallejo

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from London to San Francisco

Discover the top 3 airlines 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 629,999 searches. Data last updated 3 July 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 274AverageC$ 447FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 343AverageC$ 622FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 361AverageC$ 609FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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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.

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

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

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

Of course! You can now track prices for flights from London to San Francisco and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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