Cheap Flights From San Francisco Intl. (SFO) To Heathrow (LHR)

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Cheapest Flights from San Francisco (SFO) to London (LHR)

The cheapest flights to Heathrow found within the past 7 days were CA $662 round trip and CA $337 one way. Prices and availability subject to change. Additional terms may apply.

Wed, Mar 4 - Tue, Mar 10
SFO
San Francisco
LHR
London
CA $662 Roundtrip, found 1 day ago
CA $662
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Wed, Mar 4 from San Francisco to London, returning Tue, Mar 10, priced at CA $662 found 1 day ago
Tue, Apr 21 - Tue, Apr 28
SFO
San Francisco
LHR
London
CA $817 Roundtrip, found 1 day ago
CA $817
Roundtrip
found 1 day ago
Select Scandinavian Airlines flight, departing Tue, Apr 21 from San Francisco to London, returning Tue, Apr 28, priced at CA $817 found 1 day ago
Wed, Mar 4 - Tue, Mar 10
SFO
San Francisco
LHR
London
CA $842 Roundtrip, found 1 day ago
CA $842
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Wed, Mar 4 from San Francisco to London, returning Tue, Mar 10, priced at CA $842 found 1 day ago
Sun, Feb 1 - Tue, Feb 17
SFO
San Francisco
LHR
London
CA $848 Roundtrip, found 1 day ago
CA $848
Roundtrip
found 1 day ago
Select Virgin Atlantic flight, departing Sun, Feb 1 from San Francisco to London, returning Tue, Feb 17, priced at CA $848 found 1 day ago
Sun, Feb 1 - Tue, Feb 17
SFO
San Francisco
LHR
London
CA $860 Roundtrip, found 1 day ago
CA $860
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Sun, Feb 1 from San Francisco to London, returning Tue, Feb 17, priced at CA $860 found 1 day ago
Tue, Apr 21 - Tue, Apr 28
SFO
San Francisco
LHR
London
CA $869 Roundtrip, found 1 day ago
CA $869
Roundtrip
found 1 day ago
Select United flight, departing Tue, Apr 21 from San Francisco to London, returning Tue, Apr 28, priced at CA $869 found 1 day ago
Tue, Apr 21 - Tue, Apr 28
SFO
San Francisco
LHR
London
CA $869 Roundtrip, found 1 day ago
CA $869
Roundtrip
found 1 day ago
Select KLM flight, departing Tue, Apr 21 from San Francisco to London, returning Tue, Apr 28, priced at CA $869 found 1 day ago
Sun, Feb 1 - Tue, Feb 17
SFO
San Francisco
LHR
London
CA $875 Roundtrip, found 1 day ago
CA $875
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Sun, Feb 1 from San Francisco to London, returning Tue, Feb 17, priced at CA $875 found 1 day ago
Wed, Mar 4 - Tue, Mar 10
SFO
San Francisco
LHR
London
CA $885 Roundtrip, found 1 day ago
CA $885
Roundtrip
found 1 day ago
Select Virgin Atlantic flight, departing Wed, Mar 4 from San Francisco to London, returning Tue, Mar 10, priced at CA $885 found 1 day ago
Wed, Mar 4 - Tue, Mar 10
SFO
San Francisco
LHR
London
CA $885 Roundtrip, found 1 day ago
CA $885
Roundtrip
found 1 day ago
Select British Airways flight, departing Wed, Mar 4 from San Francisco to London, returning Tue, Mar 10, priced at CA $885 found 1 day ago

Frequently asked questions

Are there direct flights from SFO to London Heathrow?
Your next inspiring adventure is on the other side of a single flight. You can fly direct from San Francisco Airport to London Heathrow with multiple airlines, including British Airways and Virgin Atlantic.
What airlines fly from SFO to Heathrow Airport?
There are a number of airlines that advertise direct flights from San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR). British Airways (BA) is one of the most reputable, operating at least 60 flights each month. You should also pore through the deals on offer from Virgin Atlantic (VS). Another popular airline, it operates 30 flights each month on the San Francisco to London route. Compare the two to find your ideal fare.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.