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Cheap flights from London Heathrow Airport to San Francisco from £360

This is the cheapest one-way 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 18/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London Heathrow Airport to San Francisco

Cheap return flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
06:00 - 14:30LHR-SFO
16h 30m1 stop
TAP AIR PORTUGAL Logo
16:35 - 17:30SFO-LHR
16h 55m1 stop
£389TAP AIR PORTUGAL
Find Deal
Wed, 19 Nov - Wed, 3 Dec
TAP AIR PORTUGAL Logo
06:00 - 14:45LHR-SFO
16h 45m1 stop
TAP AIR PORTUGAL Logo
16:35 - 12:40SFO-LHR
36h 05m1 stop
£392TAP AIR PORTUGAL
Find Deal
Sat, 8 Nov - Sat, 15 Nov
TAP AIR PORTUGAL Logo
19:55 - 16:05LHR-SFO
28h 10m1 stop
TAP AIR PORTUGAL Logo
16:35 - 17:30SFO-LHR
16h 55m1 stop
£399TAP AIR PORTUGAL
Find Deal
Thu, 4 Dec - Wed, 10 Dec
TAP AIR PORTUGAL Logo
06:00 - 14:35LHR-SFO
16h 35m1 stop
TAP AIR PORTUGAL Logo
16:35 - 17:30SFO-LHR
16h 55m1 stop
£400TAP AIR PORTUGAL
Find Deal
Mon, 8 Dec - Sat, 17 Jan
TAP AIR PORTUGAL Logo
06:00 - 16:05LHR-SFO
18h 05m1 stop
TAP AIR PORTUGAL Logo
16:35 - 22:40SFO-LHR
22h 05m1 stop
£403TAP AIR PORTUGAL
Find Deal
Fri, 5 Dec - Mon, 8 Dec
Scandinavian Airlines Logo
06:40 - 14:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
16:40 - 17:40SFO-LHR
17h 00m1 stop
£416Scandinavian Airlines
Find Deal
Fri, 14 Nov - Sun, 16 Nov
Scandinavian Airlines Logo
06:40 - 14:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
16:40 - 16:00SFO-LHR
15h 20m1 stop
£417Scandinavian Airlines
Find Deal
Mon, 24 Nov - Fri, 28 Nov
Scandinavian Airlines Logo
06:40 - 14:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
16:40 - 16:00SFO-LHR
15h 20m1 stop
£417Scandinavian Airlines
Find Deal
Fri, 14 Nov - Fri, 6 Mar
Scandinavian Airlines Logo
06:40 - 14:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
16:40 - 18:50SFO-LHR
18h 10m2 stops
£419Scandinavian Airlines
Find Deal
Fri, 14 Nov - Sun, 16 Nov
Lufthansa Logo
07:40 - 14:50LHR-SFO
15h 10m1 stop
Lufthansa Logo
17:25 - 12:00SFO-LHR
10h 35mdirect
£444Lufthansa
Find Deal
Wed, 26 Nov - Wed, 3 Dec

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
19 Nov
LHR06:00London Heathrow
16h 30m
1 stop
SFO14:30San Francisco
3 Dec
SFO16:35San Francisco
16h 55m
1 stop
LHR17:30London Heathrow
£389
Find similar
TAP AIR PORTUGAL
8 Nov
LHR06:00London Heathrow
16h 45m
1 stop
SFO14:45San Francisco
15 Nov
SFO16:35San Francisco
36h 05m
1 stop
LHR12:40London Heathrow
£392
Find similar
TAP AIR PORTUGAL
4 Dec
LHR19:55London Heathrow
28h 10m
1 stop
SFO16:05San Francisco
10 Dec
SFO16:35San Francisco
16h 55m
1 stop
LHR17:30London Heathrow
£399
Find similar

Scandinavian Airlines flights from London Heathrow Airport to San Francisco

Our best Scandinavian Airlines deals on London Heathrow Airport to San Francisco flight tickets
Scandinavian Airlines
14 Nov
LHR06:40London Heathrow
15h 55m
1 stop
SFO14:35San Francisco
16 Nov
SFO16:40San Francisco
17h 00m
1 stop
LHR17:40London Heathrow
£416
Find similar
Scandinavian Airlines
24 Nov
LHR06:40London Heathrow
15h 55m
1 stop
SFO14:35San Francisco
28 Nov
SFO16:40San Francisco
15h 20m
1 stop
LHR16:00London Heathrow
£417
Find similar
Scandinavian Airlines
14 Nov
LHR06:40London Heathrow
15h 55m
1 stop
SFO14:35San Francisco
6 Mar
SFO16:40San Francisco
15h 20m
1 stop
LHR16:00London Heathrow
£417
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 31 October 2025.
Use the filters below to find and compare flights from London Heathrow Airport to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 19/11

06:00-14:30

1 stop16h 30m

San Francisco

Wed 3/12

16:35-17:30

1 stop16h 55m

£389

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 8/11

06:00-14:45

1 stop16h 45m

San Francisco

Sat 15/11

16:35-12:40

1 stop36h 05m

£392

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 4/12

19:55-16:05

1 stop28h 10m

San Francisco

Wed 10/12

16:35-17:30

1 stop16h 55m

£399

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 8/12

06:00-14:35

1 stop16h 35m

San Francisco

Sat 17/1

16:35-17:30

1 stop16h 55m

£400

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 5/12

06:00-16:05

1 stop18h 05m

San Francisco

Mon 8/12

16:35-22:40

1 stop22h 05m

£403

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 14/11

06:40-14:35

1 stop15h 55m

San Francisco

Sun 16/11

16:40-17:40

1 stop17h 00m

£416

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 24/11

06:40-14:35

1 stop15h 55m

San Francisco

Fri 28/11

16:40-16:00

1 stop15h 20m

£417

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 14/11

06:40-14:35

1 stop15h 55m

San Francisco

Fri 6/3

16:40-16:00

1 stop15h 20m

£417

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 14/11

06:40-14:35

1 stop15h 55m

San Francisco

Sun 16/11

16:40-18:50

2 stops18h 10m

£419

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 26/11

07:40-14:50

1 stop15h 10m

San Francisco

Wed 3/12

17:25-12:00

Nonstop10h 35m

£444

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 month of February is, on average, the cheapest month to fly to San Francisco from London Heathrow Airport, with most prices found around £430. If you are unable to visit San Francisco during the month of February, then departing from London Heathrow Airport during the month September is also very affordable. Most momondo users find prices during this month for around £441.

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

The cheapest day to depart on your flight to San Francisco is on a Thursday when prices can be found for as low as £592. This is often the case because there is less demand to fly during this day of the week. Flights from London Heathrow Airport to San Francisco on a Sunday will generally be more expensive and average around £692. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to San Francisco is in the evening. Flights from London Heathrow Airport to San Francisco during this time can be as low as £488. Try not to purchase tickets at midday because they tend to be around £978. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 £514 when searching weeks before you fly. 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 £477 on momondo.

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

There are 4 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.

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

As of October 2025, prices for London Heathrow Airport to San Francisco flights are approximately 21% 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 return 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

£438

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 £438. The best return flight deal from London Heathrow Airport to San Francisco found on momondo in the last 72 hours is £510.
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)
Search flight deals

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

    The straight-line distance from London Heathrow to San Francisco is 5341.3 mi. Typically, this will take 15h 10m by plane in normal conditions.

  • 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 were last updated today.

  • 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 travel and health documents required for your trip to San Francisco Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Francisco Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • 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
DeltaPriceFrom £242Free CancellationRating
7.9
7,997 reviews
Search Delta flights
Air CanadaPriceFrom £342Free CancellationRating
7.1
10,384 reviews
Search Air Canada flights
Aer LingusPriceFrom £357Free CancellationRating
7.2
1,365 reviews
Search Aer Lingus flights
TAP AIR PORTUGALPriceFrom £358Free CancellationRating
7.1
2,040 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom £362Free CancellationRating
7.4
1,548 reviews
Search Scandinavian Airlines flights
Brussels AirlinesPriceFrom £362Free CancellationRating
7.2
369 reviews
Search Brussels Airlines flights
SWISSPriceFrom £364Free CancellationRating
7.5
1,775 reviews
Search SWISS flights
United AirlinesPriceFrom £368Free CancellationRating
7.4
8,995 reviews
Search United Airlines flights
KLMPriceFrom £379Free CancellationRating
7.7
1,406 reviews
Search KLM flights
Virgin AtlanticPriceFrom £379Free CancellationRating
7.5
671 reviews
Search Virgin Atlantic flights

  • Delta Flights From London Heathrow Airport to San Francisco

    Delta flies from London Heathrow Airport to San Francisco around 4 times per week, with 7,997 momondo users rating the airline 7.9/10. The cheapest Delta deal from London Heathrow Airport to San Francisco in the last 72 hours was £242 (round-trip), much lower than the average airfare cost of £498 for Delta flights on this route.

  • KLM Flights From London Heathrow Airport to San Francisco

    KLM is also a popular choice for this route. KLM flight deals for London Heathrow Airport to San Francisco start from as low as £379 round-trip, depending on your selected dates, with average KLM deals seen on momondo around £465. KLM operates 4 flights to San Francisco from London Heathrow Airport in an average week. Users have rated it 7.7/10 across 1,406 reviews.

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Carmel-by-the-Sea
Santa Clara
Seaside
Big Sur
Rohnert Park
Sunnyvale
San Ramon
South San Francisco
Capitola
Campbell
Palo Alto
Sausalito
San Bruno
Woodland
Santa Cruz
Redwood City
Burlingame
Modesto
Aptos
Fremont

Why use momondo?

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

It is quick and easy to find London to San Francisco flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Francisco that suits you.

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

All flight searches from London to San Francisco on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between London and San Francisco by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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.

An easier way to manage your San Francisco trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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