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Cheap flights from London Heathrow Airport to San Francisco from C$ 640

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to San Francisco departing on 2/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from London Heathrow Airport to San Francisco

Cheap round-trip flights

SWISS Logo
8:55 a.m. - 4:25 p.m.LHR-SFO
15h 30m1 stop
SWISS Logo
7:25 p.m. - 5:50 p.m.SFO-LHR
14h 25m1 stop
C$ 640SWISS
Find Deal
Tue, 2 Dec - Tue, 16 Dec
Scandinavian Airlines Logo
6:40 a.m. - 4:30 p.m.LHR-SFO
17h 50m1 stop
Scandinavian Airlines Logo
8:50 p.m. - 5:40 p.m.SFO-LHR
13h 50m1 stop
C$ 642Scandinavian Airlines
Find Deal
Thu, 16 Oct - Sat, 25 Oct
TAP AIR PORTUGAL Logo
6:00 a.m. - 2:30 p.m.LHR-SFO
16h 30m1 stop
TAP AIR PORTUGAL Logo
7:35 p.m. - 6:55 p.m.SFO-LHR
16h 20m1 stop
C$ 685TAP AIR PORTUGAL
Find Deal
Thu, 16 Oct - Sat, 25 Oct
TAP AIR PORTUGAL Logo
7:50 p.m. - 2:30 p.m.LHR-SFO
26h 40m1 stop
TAP AIR PORTUGAL Logo
6:45 p.m. - 10:00 p.m.SFO-LHR
19h 15m2 stops
C$ 706TAP AIR PORTUGAL
Find Deal
Sun, 24 Aug - Tue, 9 Sep
United Airlines Logo
6:30 a.m. - 5:38 p.m.LHR-SFO
19h 08m2 stops
United Airlines Logo
11:35 a.m. - 1:20 p.m.SFO-LHR
17h 45m1 stop
C$ 724United Airlines
Find Deal
Mon, 22 Sep - Thu, 2 Oct
United Airlines Logo
6:30 a.m. - 3:28 p.m.LHR-SFO
16h 58m2 stops
United Airlines Logo
7:50 p.m. - 2:10 p.m.SFO-LHR
10h 20mdirect
C$ 725United Airlines
Find Deal
Wed, 17 Sep - Sat, 27 Sep
Lufthansa Logo
8:45 a.m. - 7:35 p.m.LHR-SFO
18h 50m1 stop
Lufthansa Logo
6:25 p.m. - 12:00 p.m.SFO-LHR
10h 35mdirect
C$ 747Lufthansa
Find Deal
Thu, 1 Jan - Fri, 20 Mar
Austrian Airlines Logo
6:00 a.m. - 9:05 p.m.LHR-SFO
22h 05m2 stops
Austrian Airlines Logo
8:25 a.m. - 11:15 a.m.SFO-LHR
18h 50m2 stops
C$ 749Austrian Airlines
Find Deal
Thu, 30 Oct - Thu, 6 Nov
Lufthansa Logo
6:30 a.m. - 12:40 p.m.LHR-SFO
14h 10m1 stop
Lufthansa Logo
2:40 p.m. - 2:40 p.m.SFO-LHR
16h 00m1 stop
C$ 754Lufthansa
Find Deal
Fri, 29 Aug - Fri, 12 Sep
Austrian Airlines Logo
6:00 a.m. - 7:57 p.m.LHR-SFO
21h 57m2 stops
Austrian Airlines Logo
8:40 a.m. - 8:20 a.m.SFO-LHR
39h 40m2 stops
C$ 773Austrian Airlines
Find Deal
Mon, 22 Sep - Thu, 2 Oct

SWISS flights from London Heathrow Airport to San Francisco

Our best SWISS deals on London Heathrow Airport to San Francisco flight tickets
SWISS
2 Dec
LHR8:55 a.m.London Heathrow
15h 30m
1 stop
SFO4:25 p.m.San Francisco
16 Dec
SFO7:25 p.m.San Francisco
14h 25m
1 stop
LHR5:50 p.m.London Heathrow
SWISS
24 Aug
LHR8:05 p.m.London Heathrow
28h 05m
1 stop
SFO4:10 p.m.San Francisco
9 Sep
SFO7:30 p.m.San Francisco
14h 20m
1 stop
LHR5:50 p.m.London Heathrow
SWISS
21 Aug
LHR8:05 p.m.London Heathrow
28h 05m
1 stop
SFO4:10 p.m.San Francisco
13 Sep
SFO7:30 p.m.San Francisco
18h 15m
1 stop
LHR9:45 p.m.London Heathrow

TAP AIR PORTUGAL flights from London Heathrow Airport to San Francisco

Our best TAP AIR PORTUGAL deals on London Heathrow Airport to San Francisco flight tickets
TAP AIR PORTUGAL
16 Oct
LHR6:00 a.m.London Heathrow
16h 30m
1 stop
SFO2:30 p.m.San Francisco
25 Oct
SFO7:35 p.m.San Francisco
16h 20m
1 stop
LHR6:55 p.m.London Heathrow
TAP AIR PORTUGAL
24 Aug
LHR7:50 p.m.London Heathrow
26h 40m
1 stop
SFO2:30 p.m.San Francisco
9 Sep
SFO6:45 p.m.San Francisco
19h 15m
2 stops
LHR10:00 p.m.London Heathrow
TAP AIR PORTUGAL
24 Aug
LHR7:50 p.m.London Heathrow
26h 40m
1 stop
SFO2:30 p.m.San Francisco
9 Sep
SFO6:45 p.m.San Francisco
19h 15m
2 stops
LHR10:00 p.m.London Heathrow

See travel insights to San Francisco from

How to get the cheapest flight ticket from London Heathrow Airport to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Francisco?

The cheapest month to fly to San Francisco from London Heathrow Airport is in February. Flight prices, which tend to average around C$ 771, are often lower during this time because this is during the off-season. The month of November is another great option to travel to San Francisco, with average flight prices from London Heathrow Airport averaging around C$ 805.

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart from London Heathrow Airport to San Francisco is on a Friday. Travellers who choose to depart for San Francisco on a Friday will often find tickets for as low as C$ 869. On the other hand, Saturday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 1,842.

What is the cheapest time of day to depart on your flight to San Francisco?

Flying to San Francisco from London Heathrow Airport at noon is the least expensive time of day to depart. momondo users have found prices as low as C$ 869 when looking at flights departing at noon. In contrast, the most expensive time of day to depart to San Francisco is in the afternoon when prices are around C$ 1,461.

What is the cheapest London Heathrow to San Francisco flight route?

Fly from London Heathrow to San Francisco for the best London Heathrow - San Francisco flight prices

How far in advance should I book a flight to San Francisco?

You are more likely to see cheaper flights to San Francisco from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around C$ 934 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from London Heathrow Airport for as low as C$ 850 on momondo.

What cabin class options are available on London Heathrow to San Francisco flights?

There are 2 cabin classes available to choose from on London Heathrow to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London Heathrow Airport to San Francisco flights?

You could potentially save up to 1% on your flight if you consider stops on a London Heathrow Airport to San Francisco flight.

How have London Heathrow Airport to San Francisco flight prices changed over time?

As of July 2025, prices for London Heathrow Airport to San Francisco flights are approximately 6% more expensive when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to San Francisco

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to San Francisco according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London Heathrow Airport to San Francisco (LHR to SFO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to San Francisco

Best price found

C$ 747

Fastest flight time

11h 00m

Direct flights

Every day

Airports in San Francisco

1 airport
The best one-way flight to San Francisco from London Heathrow Airport in the past 72 hours is C$ 747. The best round-trip flight deal from London Heathrow Airport to San Francisco found on momondo in the last 72 hours is C$ 640.
The fastest flight from London Heathrow Airport to San Francisco takes 11h 00m
Direct flights go from London Heathrow Airport to San Francisco every day.
There is 1 airport near San Francisco: San Francisco (SFO)

  • How far is London Heathrow to San Francisco by plane?

    San Francisco is 8596.0 km away from London Heathrow. Flights usually cover this in 11h 00m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from London Heathrow Airport to San Francisco Airport?

    Prices for flights from London Heathrow Airport to San Francisco Airport are updated daily.

  • How many operators does momondo search for flights from London Heathrow Airport to San Francisco Airport?

  • How old do you have to be to fly from London Heathrow Airport to San Francisco Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to San Francisco Airport.

  • What documentation or ID do you need to fly to San Francisco Airport?

    The necessary travel and health documents for your San Francisco Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from London Heathrow Airport to San Francisco?

  • What is the most popular airline from London Heathrow Airport to San Francisco?


Best airlines flying from London Heathrow Airport to San Francisco

Compare and see reviews for airlines that fly from London Heathrow Airport to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom C$ 869Free CancellationRating
7.4
8,844 reviews
Search United Airlines flights
  • United Airlines Flights From London Heathrow Airport to San Francisco

    United Airlines flies from London Heathrow Airport to San Francisco around 21 times per week, with 8,844 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from London Heathrow Airport to San Francisco in the last 72 hours was C$ 636 (round-trip), much lower than the average airfare cost of C$ 636 for United Airlines flights on this route.


Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Los Altos
South San Francisco
Palo Alto
Newark
Santa Cruz
Sunnyvale
Fremont
Yountville
Turlock
Mountain View
San Bruno
Half Moon Bay
Pacific Grove
Mill Valley
Los Banos
Pacifica
Berkeley
Roseville
Woodland
Carmel Valley

Why use momondo?

Why should I use momondo to find a flight deal from London to San Francisco?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to San Francisco . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from London to San Francisco with flexible booking policies on momondo?

momondo does allow users to show only those flights to San Francisco from London which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from London to San Francisco?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Francisco from London.

I’m not ready to book a flight from London to San Francisco right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of London to San Francisco flights. All you need is a valid email address and we will do the rest; it is that quick and easy.


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1 adult
Sun 13/7
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