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Cheap flights from London Heathrow Airport to San Francisco from £347

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 24/9. 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

Lufthansa Logo
08:30 - 16:00LHR-SFO
15h 30m1 stop
Lufthansa Logo
16:05 - 10:25SFO-LHR
10h 20mdirect
£394Lufthansa
Find Deal
Thu, 25 Sep - Wed, 1 Oct
Lufthansa Logo
10:35 - 13:40LHR-SFO
11h 05mdirect
Lufthansa Logo
16:05 - 10:25SFO-LHR
10h 20mdirect
£394Lufthansa
Find Deal
Thu, 25 Sep - Sun, 12 Oct
Finnair Logo
19:40 - 09:24LHR-SFO
21h 44m1 stop
Finnair Logo
22:43 - 21:40SFO-LHR
14h 57m1 stop
£395Finnair
Find Deal
Wed, 1 Oct - Sat, 4 Oct
Virgin Atlantic Logo
10:55 - 23:29LHR-SFO
20h 34m2 stops
Virgin Atlantic Logo
16:44 - 14:15SFO-LHR
13h 31m1 stop
£397Virgin Atlantic
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Sat, 27 Sep - Mon, 29 Sep
Virgin Atlantic Logo
17:25 - 23:29LHR-SFO
14h 04m1 stop
Virgin Atlantic Logo
21:20 - 15:40SFO-LHR
10h 20mdirect
£398Virgin Atlantic
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Mon, 29 Sep - Tue, 14 Oct
British Airways Logo
12:00 - 21:05LHR-SFO
17h 05m1 stop
British Airways Logo
08:00 - 09:00SFO-LHR
17h 00m1 stop
£399British Airways
Find Deal
Wed, 1 Oct - Sun, 5 Oct
British Airways Logo
10:45 - 13:50LHR-SFO
11h 05mdirect
British Airways Logo
20:40 - 15:10SFO-LHR
10h 30mdirect
£400British Airways
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Wed, 24 Sep - Sun, 30 Nov
United Airlines Logo
08:40 - 16:35LHR-SFO
15h 55m1 stop
United Airlines Logo
16:05 - 10:25SFO-LHR
10h 20mdirect
£401United Airlines
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Wed, 1 Oct - Sun, 5 Oct
United Airlines Logo
13:05 - 20:10LHR-SFO
15h 05m1 stop
United Airlines Logo
11:40 - 09:35SFO-LHR
13h 55m1 stop
£408United Airlines
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Sun, 28 Sep - Sun, 5 Oct
Finnair Logo
08:20 - 17:20LHR-SFO
17h 00m1 stop
Finnair Logo
14:06 - 11:40SFO-LHR
13h 34m1 stop
£426Finnair
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Thu, 23 Oct - Thu, 6 Nov

Lufthansa flights from London Heathrow Airport to San Francisco

Our best Lufthansa deals on London Heathrow Airport to San Francisco flight tickets
Lufthansa
25 Sept
LHR08:30London Heathrow
15h 30m
1 stop
SFO16:00San Francisco
1 Oct
SFO16:05San Francisco
10h 20m
LHR10:25London Heathrow
£394
Find similar
Lufthansa
25 Sept
LHR10:35London Heathrow
11h 05m
SFO13:40San Francisco
12 Oct
SFO16:05San Francisco
10h 20m
LHR10:25London Heathrow
£394
Find similar
Lufthansa
21 Oct
LHR09:30London Heathrow
14h 30m
1 stop
SFO16:00San Francisco
3 Nov
SFO12:50San Francisco
10h 35m
LHR07:25London Heathrow
£413
Find similar

Air Canada flights from London Heathrow Airport to San Francisco

Our best Air Canada deals on London Heathrow Airport to San Francisco flight tickets
Air Canada
27 Sept
LHR08:30London Heathrow
20h 23m
1 stop
SFO20:53San Francisco
29 Sept
SFO23:45San Francisco
25h 50m
1 stop
LHR09:35London Heathrow
£396
Find similar
Air Canada
21 Sept
LHR09:30London Heathrow
18h 21m
1 stop
SFO19:51San Francisco
11 Oct
SFO08:40San Francisco
16h 55m
2 stops
LHR09:35London Heathrow
£399
Find similar
Air Canada
18 Sept
LHR08:40London Heathrow
19h 11m
2 stops
SFO19:51San Francisco
1 Oct
SFO11:40San Francisco
13h 55m
1 stop
LHR09:35London Heathrow
£400
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 12 September 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

Thu 25/9

08:30-16:00

1 stop15h 30m

San Francisco

Wed 1/10

16:05-10:25

Nonstop10h 20m

£394

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 25/9

10:35-13:40

Nonstop11h 05m

San Francisco

Sun 12/10

16:05-10:25

Nonstop10h 20m

£394

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 1/10

19:40-09:24

1 stop21h 44m

San Francisco

Sat 4/10

22:43-21:40

1 stop14h 57m

£395

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 27/9

10:55-23:29

2 stops20h 34m

San Francisco

Mon 29/9

16:44-14:15

1 stop13h 31m

£397

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 29/9

17:25-23:29

1 stop14h 04m

San Francisco

Tue 14/10

21:20-15:40

Nonstop10h 20m

£398

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 1/10

12:00-21:05

1 stop17h 05m

San Francisco

Sun 5/10

08:00-09:00

1 stop17h 00m

£399

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 24/9

10:45-13:50

Nonstop11h 05m

San Francisco

Sun 30/11

20:40-15:10

Nonstop10h 30m

£400

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 1/10

08:40-16:35

1 stop15h 55m

San Francisco

Sun 5/10

16:05-10:25

Nonstop10h 20m

£401

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 28/9

13:05-20:10

1 stop15h 05m

San Francisco

Sun 5/10

11:40-09:35

1 stop13h 55m

£408

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 23/10

08:20-17:20

1 stop17h 00m

San Francisco

Thu 6/11

14:06-11:40

1 stop13h 34m

£426

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 £416. If you are unable to visit San Francisco during the month of February, then departing from London Heathrow Airport during the month November is also very affordable. Most momondo users find prices during this month for around £433.

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 Tuesday when prices can be found for as low as £557. 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 £632. 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 £475. Try not to purchase tickets at midday because they tend to be around £931. 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 £497 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 £454 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 September 2025, prices for London Heathrow Airport to San Francisco flights are approximately 40% 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

£494

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 £494. The best return flight deal from London Heathrow Airport to San Francisco found on momondo in the last 72 hours is £463.
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 11h 00m 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 £236Free CancellationRating
7.9
7,960 reviews
Search Delta flights
TAP AIR PORTUGALPriceFrom £347Free CancellationRating
7.1
1,977 reviews
Search TAP AIR PORTUGAL flights
SWISSPriceFrom £349Free CancellationRating
7.5
1,731 reviews
Search SWISS flights
Aer LingusPriceFrom £349Free CancellationRating
7.2
1,271 reviews
Search Aer Lingus flights
Scandinavian AirlinesPriceFrom £352Free CancellationRating
7.4
1,484 reviews
Search Scandinavian Airlines flights
Brussels AirlinesPriceFrom £356Free CancellationRating
7.2
359 reviews
Search Brussels Airlines flights
Air CanadaPriceFrom £357Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Virgin AtlanticPriceFrom £359Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom £362Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
United AirlinesPriceFrom £364Free CancellationRating
7.4
8,937 reviews
Search United Airlines flights

  • Delta Flights From London Heathrow Airport to San Francisco

    Delta flies from London Heathrow Airport to San Francisco around 14 times per week, with 7,960 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 £319 (round-trip), much lower than the average airfare cost of £659 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 £498 round-trip, depending on your selected dates, with average KLM deals seen on momondo around £613. KLM operates 14 flights to San Francisco from London Heathrow Airport in an average week. Users have rated it 7.8/10 across 1,385 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
Vacaville
Salinas
Rohnert Park
Campbell
Sunnyvale
Milpitas
San Ramon
South San Francisco
Capitola
Sonoma
San Bruno
Sausalito
Millbrae
Santa Cruz
Woodland
Redwood City
Burlingame

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.
Start using Trips
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