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Cheap flights from London, ON to San Francisco Bay Area from C$ 245

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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SFO
2 Sep — 9 Sep1
1 adult

Cheap flight deals from London to San Francisco Bay Area

Keep the following information in mind while searching for London to San Francisco Bay Area flight deals. Data was last updated 28 August 2025.

Round-trip from

C$ 453

One-way from

C$ 245

Popular in

December

Cheapest in

August

Average price

C$ 304
WestJet
  • WestJet
  • 11/10-18/10
  • 2 total stops
  • 32h 16m total
  • London to San Francisco Bay Area
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WestJet
  • WestJet
  • 8/12
  • 1 total stop
  • 19h 12m total
  • London to San Francisco Bay Area
Search Deals
Highest demand for flights based on searches. 28% potential increase in price (C$ 297 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
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Find flight deals from London to San Francisco Bay Area

Cheapest flights from London to San Francisco Bay Area
Explore the most affordable flight options available from London to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 August 2025.

Sat 11/108:00 p.m.YXU - SFO
1 stop18h 54mWestJet
Sat 18/1012:50 p.m.SFO - YXU
1 stop13h 22mWestJet
Deal found 27/8C$ 453
Sat 11/108:00 p.m.YXU - SFO
1 stop18h 54mMultiple Airlines
Sat 18/1010:15 a.m.SFO - YXU
3 stops15h 57mMultiple Airlines
Deal found 27/8C$ 529
Wed 10/96:00 a.m.YXU - SFO
1 stop8h 54mWestJet
Tue 23/97:30 a.m.SFO - YXU
1 stop18h 42mWestJet
Deal found 27/8C$ 546
Wed 22/106:00 a.m.YXU - SFO
1 stop8h 54mMultiple Airlines
Tue 28/109:27 p.m.SFO - YXU
2 stops42h 45mMultiple Airlines
Deal found 26/8C$ 582
Tue 9/125:45 a.m.YXU - SFO
1 stop8h 09mAir Canada
Tue 30/128:35 a.m.SFO - YXU
1 stop9h 46mAir Canada
Deal found 28/8C$ 604
Sat 11/103:40 p.m.YXU - SFO
1 stop8h 52mUnited Airlines
Fri 17/1012:43 a.m.SFO - YXU
2 stops11h 19mUnited Airlines
Deal found 27/8C$ 614
Tue 9/129:25 a.m.YXU - SFO
1 stop8h 50mAir Canada
Sun 28/126:00 p.m.SFO - YXU
2 stops11h 46mAir Canada
Deal found 28/8C$ 633
Sat 13/125:45 a.m.YXU - SFO
2 stops12h 50mAir Canada
Mon 29/128:35 a.m.SFO - YXU
1 stop9h 46mAir Canada
Deal found 26/8C$ 635

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to San Francisco Bay Area 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 28 August 2025.
Use the filters below to find and compare flights from London to San Francisco Bay Area that are best for you.

Fly from

London

Fly to

San Francisco Bay Area

Route

Depart

Return

Price

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 11/10

8:00 p.m.-11:54 a.m.

1 stop18h 54m

San Francisco

Sat 18/10

12:50 p.m.-5:12 a.m.

1 stop13h 22m

C$ 453

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 11/10

8:00 p.m.-11:54 a.m.

1 stop18h 54m

San Francisco

Sat 18/10

10:15 a.m.-5:12 a.m.

3 stops15h 57m

C$ 529

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 10/9

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

1 stop8h 54m

San Francisco

Tue 23/9

7:30 a.m.-5:12 a.m.

1 stop18h 42m

C$ 546

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 22/10

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

1 stop8h 54m

San Francisco

Tue 28/10

9:27 p.m.-7:12 p.m.

2 stops42h 45m

C$ 582

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 12/12

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

1 stop8h 50m

San Francisco

Wed 31/12

7:30 a.m.-9:21 p.m.

2 stops10h 51m

C$ 604

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 11/12

5:45 a.m.-3:35 p.m.

2 stops12h 50m

San Francisco

Mon 29/12

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

2 stops11h 46m

C$ 604

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 13/12

5:45 a.m.-10:50 a.m.

1 stop8h 05m

San Francisco

Tue 30/12

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

2 stops11h 46m

C$ 604

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 8/12

8:00 p.m.-12:12 p.m.

1 stop19h 12m

C$ 245

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 10/12

7:50 p.m.-12:12 p.m.

1 stop19h 22m

C$ 245

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 11/10

8:00 p.m.-11:54 a.m.

1 stop18h 54m

C$ 256

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/8

Showing 1-10 of 20 results
1
2

Best time to book a flight from London to San Francisco Bay Area

Have a flexible travel schedule? Discover the best time to fly to San Francisco Bay Area 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 Bay Area

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

Currently, January is the cheapest month in which you can book a flight from London, Ontario to San Francisco Bay Area (average of C$ 276). Flying from London, Ontario to San Francisco Bay Area 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.

Reviews of airlines servicing San Francisco Bay Area

Get insights into the airlines that provide service to San Francisco Bay Area. 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 Bay Area. Reviews last updated 28 August 2025.
Read through reviews of airlines operating flights from London to San Francisco Bay Area, such as United Airlines,WestJet, andAir Canada. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,944 reviews
Check prices

Crew

8.1

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

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
8,944 reviews
United Airlines
7.4
Good
8,944 reviews
Check prices

Crew

8.1

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

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
3,065 reviews
United Airlines
7.4
Good
8,944 reviews
Check prices

Crew

8.1

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

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
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,944 reviews
Check prices

Crew

8.1

Comfort

7.3

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

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 Bay Area. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from London to San Francisco Bay Area?

    Located just 8.6 km from the city centre, London (YXU) is the airport most travellers will use when flying to San Francisco Bay Area from London.

  • How long is the flight from London, Ontario to San Francisco Bay Area?

    A quick flight from London, Ontario to San Francisco Bay Area can take about 18h 54m. WestJet provides one of the quickest options available for as low as C$ 453. The distance between London, Ontario and San Francisco Bay Area is about 3508 km.

  • What are the most popular routes from London, Ontario to San Francisco Bay Area?

    The most popular route from London, Ontario to San Francisco Bay Area is London - San Francisco. You may also consider London - San Jose or London - Santa Rosa Sonoma County.

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

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

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

    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 Bay Area.

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

    Yes. Cheapflights offers flight deals from London to San Francisco Bay Area 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 Bay Area?

    Currently, January is the cheapest month in which you can book a flight from London, Ontario to San Francisco Bay Area (average of C$ 276). Flying from London, Ontario to San Francisco Bay Area 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

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Alternative routes for London to San Francisco Bay Area

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Top 3 airlines flying from London to San Francisco Bay Area

Discover the top 3 airlines that operate flights from London to San Francisco Bay Area. 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 28 August 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 241AverageC$ 421FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 304AverageC$ 615FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 347AverageC$ 629FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from London to San Francisco Bay Area?

When you search for this flight from London to San Francisco Bay Area, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from London to San Francisco Bay Area?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Francisco Bay Area from London.

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

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

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

Yes, Cheapflights offers price alerts on London to San Francisco Bay Area flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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