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Cheap flights from London Heathrow Airport to San Francisco from £366

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 19/3. 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.
JetBlue Logo
08:05 - 22:59
LHR
-
SFO
22h 54m1 stop
JetBlue Logo
20:37 - 20:45
SFO
-
LHR
16h 08m1 stop
£470JetBlue
Fri, 9 Jan - Sun, 25 Jan
British Airways Logo
11:45 - 15:00
LHR
-
SFO
11h 15mdirect
British Airways Logo
20:40 - 15:10
SFO
-
LHR
10h 30mdirect
£471British Airways
Wed, 21 Jan - Thu, 29 Jan
Lufthansa Logo
08:45 - 16:10
LHR
-
SFO
15h 25m1 stop
Lufthansa Logo
21:05 - 19:40
SFO
-
LHR
14h 35m1 stop
£471Lufthansa
Mon, 27 Apr - Wed, 20 May
JetBlue Logo
08:05 - 17:09
LHR
-
SFO
17h 04m1 stop
JetBlue Logo
15:05 - 21:40
SFO
-
LHR
22h 35m1 stop
£472JetBlue
Fri, 9 Jan - Wed, 14 Jan
British Airways Logo
15:25 - 19:45
LHR
-
SFO
11h 20mdirect
British Airways Logo
16:35 - 11:00
SFO
-
LHR
10h 25mdirect
£473British Airways
Wed, 11 Mar - Mon, 30 Mar
Multiple Airlines Logo
09:00 - 20:53
LHR
-
SFO
19h 53m2 stops
Multiple Airlines Logo
07:30 - 11:20
SFO
-
LHR
19h 50m2 stops
£473Multiple Airlines
Wed, 4 Feb - Wed, 18 Feb
SWISS Logo
20:05 - 16:30
LHR
-
SFO
28h 25m1 stop
SWISS Logo
19:25 - 17:50
SFO
-
LHR
14h 25m1 stop
£474SWISS
Mon, 12 Jan - Wed, 11 Feb
Scandinavian Airlines Logo
06:40 - 14:40
LHR
-
SFO
16h 00m1 stop
Scandinavian Airlines Logo
16:45 - 18:50
SFO
-
LHR
18h 05m2 stops
£475Scandinavian Airlines
Mon, 6 Apr - Mon, 27 Apr
United Airlines Logo
16:40 - 14:50
LHR
-
SFO
30h 10m1 stop
United Airlines Logo
12:50 - 07:25
SFO
-
LHR
10h 35mdirect
£476United Airlines
Mon, 12 Jan - Mon, 26 Jan
United Airlines Logo
16:40 - 14:50
LHR
-
SFO
30h 10m1 stop
United Airlines Logo
12:50 - 07:25
SFO
-
LHR
10h 35mdirect
£476United Airlines
Mon, 12 Jan - Mon, 26 Jan

Lufthansa flights from London Heathrow Airport to San Francisco

Our best Lufthansa deals on London Heathrow Airport to San Francisco flight tickets
Lufthansa
27 Apr
LHR08:45London Heathrow
15h 25m
1 stop
SFO16:10San Francisco
20 May
SFO21:05San Francisco
14h 35m
1 stop
LHR19:40London Heathrow
£471
Find similar
Lufthansa
16 Feb
LHR06:30London Heathrow
14h 10m
1 stop
SFO12:40San Francisco
22 Feb
SFO17:25San Francisco
10h 35m
LHR12:00London Heathrow
£481
Find similar
Lufthansa
28 Jan
LHR10:05London Heathrow
11h 15m
SFO13:20San Francisco
18 Feb
SFO12:50San Francisco
10h 35m
LHR07:25London Heathrow
£484
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
6 Apr
LHR06:40London Heathrow
16h 00m
1 stop
SFO14:40San Francisco
27 Apr
SFO16:45San Francisco
18h 05m
2 stops
LHR18:50London Heathrow
£475
Find similar
Scandinavian Airlines
13 Apr
LHR19:50London Heathrow
26h 50m
2 stops
SFO14:40San Francisco
27 Apr
SFO16:45San Francisco
18h 05m
2 stops
LHR18:50London Heathrow
£476
Find similar
Scandinavian Airlines
12 Jan
LHR19:30London Heathrow
35h 34m
2 stops
SFO23:04San Francisco
19 Jan
SFO16:40San Francisco
17h 50m
1 stop
LHR18:30London Heathrow
£480
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 December 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

Fri 9/1

08:05-22:59

1 stop22h 54m

San Francisco

Sun 25/1

20:37-20:45

1 stop16h 08m

£470

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 21/1

11:45-15:00

Nonstop11h 15m

San Francisco

Thu 29/1

20:40-15:10

Nonstop10h 30m

£470

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 27/4

08:45-16:10

1 stop15h 25m

San Francisco

Wed 20/5

21:05-19:40

1 stop14h 35m

£471

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 9/1

08:05-17:09

1 stop17h 04m

San Francisco

Wed 14/1

15:05-21:40

1 stop22h 35m

£472

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 11/3

15:25-19:45

Nonstop11h 20m

San Francisco

Mon 30/3

16:35-11:00

Nonstop10h 25m

£473

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 4/2

09:00-20:53

2 stops19h 53m

San Francisco

Wed 18/2

07:30-11:20

2 stops19h 50m

£473

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 12/1

20:05-16:30

1 stop28h 25m

San Francisco

Wed 11/2

19:25-17:50

1 stop14h 25m

£474

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 6/4

06:40-14:40

1 stop16h 00m

San Francisco

Mon 27/4

16:45-18:50

2 stops18h 05m

£475

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 12/1

16:40-14:50

1 stop30h 10m

San Francisco

Mon 26/1

12:50-07:25

Nonstop10h 35m

£476

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 12/1

16:40-14:50

1 stop30h 10m

San Francisco

Mon 26/1

12:50-07:25

Nonstop10h 35m

£476

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 £421. 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 £432.

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 £583. 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 £684. 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 £480. Try not to purchase tickets at midday because they tend to be around £963. 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 £507 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 £478 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 December 2025, prices for London Heathrow Airport to San Francisco flights are approximately 9% 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

£410

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 £410. The best return flight deal from London Heathrow Airport to San Francisco found on momondo in the last 72 hours is £545.
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 in San Francisco. From London Heathrow Airport there are direct flights to 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 £238Free CancellationRating
7.9
8,009 reviews
Search Delta flights
Air CanadaPriceFrom £336Free CancellationRating
7.1
10,518 reviews
Search Air Canada flights
Aer LingusPriceFrom £353Free CancellationRating
7.2
1,394 reviews
Search Aer Lingus flights
United AirlinesPriceFrom £353Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
Scandinavian AirlinesPriceFrom £354Free CancellationRating
7.4
1,606 reviews
Search Scandinavian Airlines flights
SWISSPriceFrom £359Free CancellationRating
7.5
1,810 reviews
Search SWISS flights
TAP AIR PORTUGALPriceFrom £359Free CancellationRating
7.1
2,089 reviews
Search TAP AIR PORTUGAL flights
Virgin AtlanticPriceFrom £376Free CancellationRating
7.5
675 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom £377Free CancellationRating
6.7
7,571 reviews
Search British Airways flights
KLMPriceFrom £379Free CancellationRating
7.7
1,432 reviews
Search KLM flights

  • Delta Flights From London Heathrow Airport to San Francisco

    Delta flies from London Heathrow Airport to San Francisco around 7 times per week, with 8,005 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 £238 (round-trip), much lower than the average airfare cost of £547 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 £459. KLM operates 7 flights to San Francisco from London Heathrow Airport in an average week. Users have rated it 7.7/10 across 1,432 reviews.

Travelling to a place near San Francisco?

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

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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