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Cheap flights from San Francisco Bay Area to London, ON from C$ 420

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 18/12. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YXU
4 Dec — 11 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from San Francisco Bay Area to London

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco Bay Area to London
Explore the most affordable flight options available from San Francisco Bay Area to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 November 2025.

Fri 19/1211:06 p.m.SFO - YXU
2 stops14h 59mUnited Airlines
Fri 26/125:10 a.m.YXU - SFO
1 stop8h 44mUnited Airlines
Deal found 4/11C$ 1,539
Fri 19/129:00 a.m.SJC - YXU
2 stops20h 46mUnited Airlines
Fri 26/129:25 a.m.YXU - SJC
2 stops16h 09mUnited Airlines
Deal found 4/11C$ 2,261

Cheap flight deals from San Francisco Bay Area to London

Keep the following information in mind while searching for San Francisco Bay Area to London flight deals. Data was last updated 4 November 2025.

Round-trip from

C$ 608

One-way from

C$ 420

Popular in

December

Cheapest in

March
Air Canada
  • Air Canada
  • 19/2-20/2
  • 3 total stops
  • 19h 35m total
  • San Francisco Bay Area to London
Search Deals
18/12
  • 18/12
  • 3 total stops
  • 21h 34m total
  • San Francisco Bay Area to London
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 180 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 12% potential price decrease (C$ 80 potential savings vs. average RT price).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco Bay Area 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 4 November 2025.
Use the filters below to find and compare flights from San Francisco Bay Area to London that are best for you.

Fly from

San Francisco Bay Area

Fly to

London

Route

Depart

Return

Price

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 19/2

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

2 stops10h 51m

London

Fri 20/2

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

1 stop8h 44m

C$ 608

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 23/3

10:50 p.m.-5:05 p.m.

2 stops15h 15m

London

Sun 29/3

5:40 p.m.-1:16 a.m.

2 stops10h 36m

C$ 741

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Wed 4/3

3:05 p.m.-6:35 a.m.

2 stops36h 30m

London

Wed 18/3

8:10 p.m.-7:05 p.m.

2 stops25h 55m

C$ 844

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 23/3

12:00 p.m.-8:46 a.m.

1 stop17h 46m

London

Sun 29/3

9:25 a.m.-9:32 p.m.

1 stop15h 07m

C$ 852

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Wed 4/3

8:50 a.m.-8:46 a.m.

3 stops20h 56m

London

Wed 18/3

5:10 a.m.-9:20 p.m.

2 stops19h 10m

C$ 1,197

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Mon 23/3

10:40 p.m.-5:05 p.m.

2 stops15h 25m

London

Sun 29/3

9:25 a.m.-9:11 p.m.

2 stops14h 46m

C$ 1,393

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Fri 19/12

9:00 a.m.-8:46 a.m.

2 stops20h 46m

London

Fri 26/12

9:25 a.m.-10:34 p.m.

2 stops16h 09m

C$ 2,261

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 18/12

6:00 a.m.-6:34 a.m.

3 stops21h 34m

C$ 420

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 18/12

4:15 p.m.-8:46 a.m.

1 stop13h 31m

C$ 585

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 17/12

12:30 a.m.-5:05 p.m.

2 stops13h 35m

C$ 1,016

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

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

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

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

Currently, February is the cheapest month in which you can book a flight from San Francisco Bay Area to London, Ontario (average of C$ 178). Flying from San Francisco Bay Area to London, Ontario in December is currently the most expensive (average of C$ 299). 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.

Related info for your journey

Find useful and relevant information for your journey from San Francisco Bay Area to London. 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 into for flights to London from San Francisco Bay Area?

    If you book a flight to London from San Francisco Bay Area, you will be flying to London, which is the city’s only airport. London (YXU) is located 8.6 km from the centre of London.

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

    For as low as C$ 608, Air Canada can have you in London, Ontario from San Francisco Bay Area in 10h 51m. The distance from San Francisco Bay Area to London, Ontario is about 3508 km.

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from San Francisco Bay Area to London, Ontario (average of C$ 178). Flying from San Francisco Bay Area to London, Ontario in December is currently the most expensive (average of C$ 299). 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?

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

Cheapflights makes it easy to find San Francisco Bay Area to London flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

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

Certainly. Search results for flights to London from San Francisco Bay Area shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes! Start tracking prices for San Francisco Bay Area to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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