Find flights
When to book
Airlines
FAQs

Cheap flights from San Francisco to London, ON 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 24/3. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YXU
25 Feb — 4 Mar1
1 adult

Cheap flight deals from San Francisco to London

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to London (YXU). 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 20 February 2025.

Round-trip from

C$ 419

One-way from

C$ 207

Popular in

December

Cheapest in

January

Average price

C$ 614
Air Canada
  • Air Canada
  • 19/3-1/4
  • 2 total stops
  • 16h 54m total
  • San Francisco to London
Search Deals
United Airlines
  • United Airlines
  • 24/3
  • 1 total stop
  • 7h 30m total
  • San Francisco to London
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (C$ 5 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 61 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

Find flight deals from San Francisco to London

Cheapest flights from San Francisco to London
Explore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 February 2025.

Wed 19/310:45 p.m.SFO - YXU
1 stop7h 30mAir Canada
Tue 1/43:25 p.m.YXU - SFO
1 stop9h 24mAir Canada
Deal found 19/2C$ 419
Wed 19/310:45 p.m.SFO - YXU
1 stop7h 30mUnited Airlines
Mon 31/33:20 p.m.YXU - SFO
1 stop9h 29mUnited Airlines
Deal found 19/2C$ 469
Sun 25/57:00 p.m.SFO - YXU
2 stops16h 58mMultiple Airlines
Wed 28/56:15 a.m.YXU - SFO
2 stops12h 20mMultiple Airlines
Deal found 20/2C$ 490
Thu 17/77:30 a.m.SFO - YXU
1 stop8h 39mWestJet
Sun 20/78:00 p.m.YXU - SFO
1 stop19h 05mWestJet
Deal found 19/2C$ 537

Find flights from San Francisco to London within your budget

Customize your flight search to find flights from San Francisco to London 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 20 February 2025.

Fly from

San Francisco

Fly to

London

Route

Depart

Return

Price

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 19/3

10:45 p.m.-9:15 a.m.

1 stop7h 30m

London

Tue 1/4

3:25 p.m.-9:49 p.m.

1 stop9h 24m

C$ 419

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 19/3

10:45 p.m.-9:15 a.m.

1 stop7h 30m

London

Mon 31/3

3:20 p.m.-9:49 p.m.

1 stop9h 29m

C$ 469

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sun 25/5

7:00 p.m.-2:58 p.m.

2 stops16h 58m

London

Wed 28/5

6:15 a.m.-3:35 p.m.

2 stops12h 20m

C$ 490

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 17/7

7:30 a.m.-7:09 p.m.

1 stop8h 39m

London

Sun 20/7

8:00 p.m.-12:05 p.m.

1 stop19h 05m

C$ 537

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 24/3

10:45 p.m.-9:15 a.m.

1 stop7h 30m

C$ 207

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 16/7

10:56 p.m.-9:17 a.m.

1 stop7h 21m

C$ 260

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 22/3

11:02 a.m.-7:13 p.m.

2 stops29h 11m

C$ 320

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sun 23/3

1:55 p.m.-7:13 p.m.

1 stop26h 18m

C$ 337

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/2

Best time to book a flight from San Francisco to London

Have a flexible travel schedule? Discover the best time to fly to London from San Francisco 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.

Travel insights for flights from San Francisco to London

Get recent, data-driven insights about flights from San Francisco to London including ideal travel times, pricing trends, and more.

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

Currently, October is the cheapest month in which you can book a flight from San Francisco to London, Ontario (average of C$ 243). Flying from San Francisco to London, Ontario in April is currently the most expensive (average of C$ 496). 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 London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London, Ontario ranges from 70.0 - 100.0 mm per month. January is typically the wettest month, when rainfall can reach 100.0 mm. March is typically the driest time to visit London, Ontario when rainfall is around 70.0 mm.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 20.0 C. Travellers hoping to avoid the cold should look outside of February, when temperatures are typically at their lowest (around -6.0 C).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 20 February 2025.
United Airlines
7.4
Good
8,766 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Food

6.7

Reviews

1 / 20

6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.

United Airlines
7.4
Good
8,766 reviews
United Airlines
7.4
Good
8,766 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Food

6.7

Reviews

1 / 20

6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.

WestJet
7.2
Good
2,801 reviews
United Airlines
7.4
Good
8,766 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Food

6.7

Reviews

1 / 20

6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.

Air Canada
7.0
Good
8,748 reviews
United Airlines
7.4
Good
8,766 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Food

6.7

Reviews

1 / 20

6.0
Good

Miz,Oct 2024

EWR - YYZ

I booked on United but it was really Air Canada. It was very confusing when I went to the airport. The ride to NY was very turbulent and shaky. The ride back was better. It would be nicer with more leg room and to get rid of the tilting the seat back thing. Fine for an hour flight but any longer would have been not great. Please put subtitles on the programs so we don;t have t use headphones if we forget them.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to London. 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 San Francisco to London, Ontario round-trip?

    Flying on Air Canada is currently your cheapest option to London, Ontario, with prices starting at C$ 419. Additional round-trip tickets that might be worth considering are offered by United Airlines and WestJet, with the lowest prices starting at C$ 469 and C$ 537, respectively. Air Canada is priced at 42% lower than the current average price of a flight leaving 3 months from now.

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

    One-way options have recently been found by users for as low as C$ 207 on United Airlines. Other airlines that offer cheap prices include Air Canada from C$ 260 and WestJet from C$ 337 one-way.

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

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

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to London.

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

    Yes. Cheapflights offers flight deals from San Francisco to London 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 San Francisco to London, Ontario?

    Currently, October is the cheapest month in which you can book a flight from San Francisco to London, Ontario (average of C$ 243). Flying from San Francisco to London, Ontario in April is currently the most expensive (average of C$ 496). 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
Grand Bend
Port Stanley

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Francisco to London

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Pearson Intl flights
San Francisco to Pearson Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
San Francisco to Pierre Elliott Trudeau Intl flights
San Diego to Pearson Intl flights
Las Vegas to Pearson Intl flights
Ontario to Pearson Intl flights
Los Angeles to Toronto Island flights
San Jose to Pearson Intl flights
San Francisco to Toronto Island flights
Sacramento to Pearson Intl flights
San Diego to Pierre Elliott Trudeau Intl flights
Oakland to Pearson Intl flights
Ontario to Pierre Elliott Trudeau Intl flights
Las Vegas to Pierre Elliott Trudeau Intl flights
Los Angeles to Region of Waterloo Intl flights
San Francisco to Ottawa flights
Santa Ana to Pearson Intl flights
San Jose to Pierre Elliott Trudeau Intl flights
Sacramento to Pierre Elliott Trudeau Intl flights
Palm Springs to Pearson Intl flights
Reno to Pearson Intl flights
Fresno to Pearson Intl flights
Burbank to Pearson Intl flights
San Francisco to Hamilton flights
Las Vegas to Ottawa flights
Los Angeles to Ottawa flights
Burbank to Pierre Elliott Trudeau Intl flights
Oakland to Pierre Elliott Trudeau Intl flights
Santa Ana to Pierre Elliott Trudeau Intl flights
Las Vegas to Region of Waterloo Intl flights
Monterey to Pearson Intl flights
Las Vegas to Hamilton flights
San Diego to Ottawa flights
San Jose to Ottawa flights
San Jose to London flights
Sacramento to Ottawa flights
Santa Barbara to Pearson Intl flights
Los Angeles to Hamilton 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 San Francisco to London?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from San Francisco today with Cheapflights!

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

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 London from San Francisco.

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

Need flexible booking options for your flight to London from San Francisco? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Of course! You can now track prices for flights from San Francisco to London 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.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.