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Cheap flights from London, ON to San Francisco from C$ 207

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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SFO
20 Jan — 27 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to San Francisco

Enter your travel dates to find the best prices.

Best flights from London to San Francisco
Discover carefully curated flight deals from London to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 21 December 2025.

Fri 16/15:10 a.m.YXU - SFO
1 stop8h 44mAir Canada
Tue 20/16:00 p.m.SFO - YXU
2 stops11h 46mAir Canada
Deal found 19/12C$ 374
Thu 22/18:10 p.m.YXU - SFO
1 stop19h 02mMultiple Airlines
Mon 2/28:42 p.m.SFO - YXU
2 stops30h 53mMultiple Airlines
Deal found 19/12C$ 411
Mon 2/25:40 p.m.YXU - SFO
2 stops10h 50mUnited Airlines
Mon 9/211:56 p.m.SFO - YXU
2 stops14h 09mUnited Airlines
Deal found 19/12C$ 455
Thu 22/15:10 a.m.YXU - SFO
1 stop8h 44mAir Canada
Mon 2/28:30 a.m.SFO - YXU
1 stop9h 50mAir Canada
Deal found 19/12C$ 424
Mon 2/28:10 p.m.YXU - SFO
1 stop19h 00mMultiple Airlines
Mon 9/28:42 p.m.SFO - YXU
2 stops30h 53mMultiple Airlines
Deal found 19/12C$ 433
Tue 3/25:10 a.m.YXU - SFO
1 stop8h 44mAir Canada
Tue 10/27:30 a.m.SFO - YXU
2 stops10h 51mAir Canada
Deal found 20/12C$ 490

Find 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 21 December 2025.

Round-trip from

C$ 374

One-way from

C$ 207

Popular in

November

Cheapest in

August

Average price

C$ 858
Air Canada
  • Air Canada
  • 16/1-20/1
  • 3 total stops
  • 20h 30m total
  • London to San Francisco
Search Deals
Air Canada
  • Air Canada
  • 3/2
  • 1 total stop
  • 8h 44m total
  • London to San Francisco
Search Deals
Highest demand for flights based on searches. 25% potential increase in price (C$ 262 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (C$ 52 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 21 December 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

Fri 16/1

5:10 a.m.-10:54 a.m.

1 stop8h 44m

San Francisco

Tue 20/1

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

2 stops11h 46m

C$ 374

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 22/1

8:10 p.m.-12:12 p.m.

1 stop19h 02m

San Francisco

Mon 2/2

8:42 p.m.-6:35 a.m.

2 stops30h 53m

C$ 411

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 22/1

5:10 a.m.-10:54 a.m.

1 stop8h 44m

San Francisco

Mon 2/2

8:30 a.m.-9:20 p.m.

1 stop9h 50m

C$ 424

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 2/2

8:10 p.m.-12:10 p.m.

1 stop19h 00m

San Francisco

Mon 9/2

8:42 p.m.-6:35 a.m.

2 stops30h 53m

C$ 433

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 2/2

5:40 p.m.-1:30 a.m.

2 stops10h 50m

San Francisco

Mon 9/2

11:56 p.m.-5:05 p.m.

2 stops14h 09m

C$ 455

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 3/2

5:10 a.m.-10:54 a.m.

1 stop8h 44m

San Francisco

Tue 10/2

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

2 stops10h 51m

C$ 490

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 3/2

5:10 a.m.-10:54 a.m.

1 stop8h 44m

C$ 207

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 1/2

9:50 a.m.-1:30 a.m.

2 stops18h 40m

C$ 261

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 18/4

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

1 stop8h 35m

C$ 270

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 1/2

8:10 p.m.-5:54 p.m.

3 stops24h 44m

C$ 290

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/12

Showing 1-10 of 13 results
1
2

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, April is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of C$ 199). Flying from London, Ontario to San Francisco in January is currently the most expensive (average of C$ 334). 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 21 December 2025.
Read through reviews of airlines operating flights from London to San Francisco, such as United Airlines,WestJet, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,099 reviews
Check prices

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
9,099 reviews
United Airlines
7.4
Good
9,099 reviews
Check prices

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
WestJet
7.2
Good
3,208 reviews
United Airlines
7.4
Good
9,099 reviews
Check prices

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Air Canada
7.1
Good
10,549 reviews
United Airlines
7.4
Good
9,099 reviews
Check prices

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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.

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

    A quick flight from London, Ontario to San Francisco can take about 8h 44m. Air Canada provides one of the quickest options available for as low as C$ 374. The distance between London, Ontario and San Francisco is about 3508 km.

  • What are the cheapest airlines flying from London, Ontario to San Francisco round-trip?

    According to our current data, WestJet (C$ 220), Air Canada (C$ 255), and United Airlines (C$ 348) offers the cheapest pricing from London, Ontario to San Francisco. WestJet is 61% 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, April is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of C$ 199). Flying from London, Ontario to San Francisco in January is currently the most expensive (average of C$ 334). 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 San Francisco?

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

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Alternative routes for London to San Francisco

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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 21 December 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 242AverageC$ 422FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 305AverageC$ 473FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 348AverageC$ 737FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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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