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Cheap flights from London Heathrow Airport to San Francisco from $350

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 9/2. 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 round-trip flights

Scandinavian Airlines Logo
7:30 pm - 2:35 pmLHR-SFO
27h 05m1 stop
Scandinavian Airlines Logo
4:40 pm - 5:40 pmSFO-LHR
17h 00m1 stop
$469Scandinavian Airlines
Find Deal
Wed, Nov 12 - Thu, Nov 20
SWISS Logo
8:40 am - 4:10 pmLHR-SFO
15h 30m1 stop
SWISS Logo
7:30 pm - 9:45 pmSFO-LHR
18h 15m1 stop
$470SWISS
Find Deal
Mon, Sep 15 - Fri, Sep 26
Scandinavian Airlines Logo
7:30 pm - 2:35 pmLHR-SFO
27h 05m1 stop
Scandinavian Airlines Logo
4:40 pm - 5:40 pmSFO-LHR
17h 00m1 stop
$474Scandinavian Airlines
Find Deal
Wed, Nov 5 - Mon, Nov 10
TAP AIR PORTUGAL Logo
6:00 am - 2:35 pmLHR-SFO
16h 35m1 stop
TAP AIR PORTUGAL Logo
4:20 pm - 5:45 pmSFO-LHR
17h 25m1 stop
$479TAP AIR PORTUGAL
Find Deal
Wed, Sep 24 - Wed, Oct 1
TAP AIR PORTUGAL Logo
6:45 pm - 2:30 pmLHR-SFO
27h 45m1 stop
TAP AIR PORTUGAL Logo
6:45 pm - 12:45 pmSFO-LHR
34h 00m2 stops
$480TAP AIR PORTUGAL
Find Deal
Wed, Sep 3 - Tue, Sep 9
Aer Lingus Logo
7:40 am - 3:50 pmLHR-SFO
16h 10m1 stop
Aer Lingus Logo
5:40 pm - 6:55 pmSFO-LHR
17h 15m1 stop
$504Aer Lingus
Find Deal
Fri, Sep 19 - Sun, Sep 28
Logo
6:00 am - 4:10 pmLHR-SFO
18h 10m1 stop
Logo
2:40 pm - 4:40 pmSFO-LHR
18h 00m1 stop
$515
Find Deal
Mon, Sep 8 - Sun, Sep 21
Logo
11:10 am - 7:35 pmLHR-SFO
16h 25m1 stop
Logo
7:25 pm - 9:40 pmSFO-LHR
18h 15m1 stop
$516
Find Deal
Tue, Nov 4 - Tue, Dec 9
Air Canada Logo
9:30 am - 7:57 pmLHR-SFO
18h 27m1 stop
Air Canada Logo
11:40 am - 9:35 amSFO-LHR
13h 55m1 stop
$525Air Canada
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Sat, Aug 30 - Sat, Sep 20
Air Canada Logo
9:30 am - 7:51 pmLHR-SFO
18h 21m1 stop
Air Canada Logo
11:40 am - 9:35 amSFO-LHR
13h 55m1 stop
$528Air Canada
Find Deal
Tue, Sep 16 - Fri, Sep 26

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
Nov 12
LHR7:30 pmLondon Heathrow
27h 05m
1 stop
SFO2:35 pmSan Francisco
Nov 20
SFO4:40 pmSan Francisco
17h 00m
1 stop
LHR5:40 pmLondon Heathrow
$469
Find similar
Scandinavian Airlines
Nov 5
LHR7:30 pmLondon Heathrow
27h 05m
1 stop
SFO2:35 pmSan Francisco
Nov 10
SFO4:40 pmSan Francisco
17h 00m
1 stop
LHR5:40 pmLondon Heathrow
$474
Find similar
Scandinavian Airlines
Nov 13
LHR6:40 amLondon Heathrow
15h 55m
1 stop
SFO2:35 pmSan Francisco
Nov 30
SFO4:40 pmSan Francisco
21h 00m
1 stop
LHR9:40 pmLondon Heathrow
$475
Find similar

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
Sep 24
LHR6:00 amLondon Heathrow
16h 35m
1 stop
SFO2:35 pmSan Francisco
Oct 1
SFO4:20 pmSan Francisco
17h 25m
1 stop
LHR5:45 pmLondon Heathrow
$479
Find similar
TAP AIR PORTUGAL
Sep 3
LHR6:45 pmLondon Heathrow
27h 45m
1 stop
SFO2:30 pmSan Francisco
Sep 9
SFO6:45 pmSan Francisco
34h 00m
2 stops
LHR12:45 pmLondon Heathrow
$480
Find similar
TAP AIR PORTUGAL
Sep 24
LHR6:00 amLondon Heathrow
16h 35m
1 stop
SFO2:35 pmSan Francisco
Oct 6
SFO4:20 pmSan Francisco
17h 25m
1 stop
LHR5:45 pmLondon Heathrow
$481
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated July 31, 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 11/12

7:30 pm-2:35 pm

1 stop27h 05m

San Francisco

Thu 11/20

4:40 pm-5:40 pm

1 stop17h 00m

$469

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 9/15

8:40 am-4:10 pm

1 stop15h 30m

San Francisco

Fri 9/26

7:30 pm-9:45 pm

1 stop18h 15m

$470

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 11/5

7:30 pm-2:35 pm

1 stop27h 05m

San Francisco

Mon 11/10

4:40 pm-5:40 pm

1 stop17h 00m

$474

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 9/24

6:00 am-2:35 pm

1 stop16h 35m

San Francisco

Wed 10/1

4:20 pm-5:45 pm

1 stop17h 25m

$479

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 9/3

6:45 pm-2:30 pm

1 stop27h 45m

San Francisco

Tue 9/9

6:45 pm-12:45 pm

2 stops34h 00m

$480

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 9/19

7:40 am-3:50 pm

1 stop16h 10m

San Francisco

Sun 9/28

5:40 pm-6:55 pm

1 stop17h 15m

$504

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 9/8

6:00 am-4:10 pm

1 stop18h 10m

San Francisco

Sun 9/21

2:40 pm-4:40 pm

1 stop18h 00m

$515

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 11/4

11:10 am-7:35 pm

1 stop16h 25m

San Francisco

Tue 12/9

7:25 pm-9:40 pm

1 stop18h 15m

$516

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 8/30

9:30 am-7:57 pm

1 stop18h 27m

San Francisco

Sat 9/20

11:40 am-9:35 am

1 stop13h 55m

$525

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 9/16

9:30 am-7:51 pm

1 stop18h 21m

San Francisco

Fri 9/26

11:40 am-9:35 am

1 stop13h 55m

$528

Flights are sorted by cheapest round-trip 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 typical price of a round-trip flight between London Heathrow Airport and San Francisco?

What is the cheapest month to fly to San Francisco?

If you aren’t able to travel to San Francisco during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $590.

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 Thursday when prices can be found for as low as $633. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $760.

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

Our data shows that the cheapest London Heathrow Airport to San Francisco flights are usually those with departure times in the evening. Our users have found flights to San Francisco in the evening for as low as $682. Flights in the morning are often more expensive with an average ticket price of $721.

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 $679 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 $625 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 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

$350

Fastest flight time

15h 30m

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 $350. The best round-trip flight deal from London Heathrow Airport to San Francisco found on momondo in the last 72 hours is $469.
The fastest flight from London Heathrow Airport to San Francisco takes 15h 30m
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. By plane, this route typically takes 15h 30m.

  • 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 for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for 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
British AirwaysPriceFrom $511Free CancellationRating
6.6
7,222 reviews
Search British Airways flights
United AirlinesPriceFrom $543Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
Brussels AirlinesPriceFrom $546Free CancellationRating
7.2
350 reviews
Search Brussels Airlines flights
Virgin AtlanticPriceFrom $553Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
DeltaPriceFrom $555Free CancellationRating
8.0
7,981 reviews
Search Delta flights
Austrian AirlinesPriceFrom $564Free CancellationRating
7.6
823 reviews
Search Austrian Airlines flights
Scandinavian AirlinesPriceFrom $577Free CancellationRating
7.3
1,457 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $579Free CancellationRating
6.8
7,275 reviews
Search Lufthansa flights
American AirlinesPriceFrom $594Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
IberiaPriceFrom $596Free CancellationRating
7.0
2,859 reviews
Search Iberia flights

  • Delta Flights From London Heathrow Airport to San Francisco

    Delta operates around 14 flights from London Heathrow Airport to San Francisco every week. The average price of these flights found in the last 72 hours has been $708, but momondo users have found Delta deals from London Heathrow Airport to San Francisco from as low as $555 round-trip. Delta has been scored 8.0/10 in 7,981 reviews.

  • Austrian Airlines Flights From London Heathrow Airport to San Francisco

    Austrian Airlines is also a popular choice for this route. Austrian Airlines flight deals for London Heathrow Airport to San Francisco start from as low as $564 round-trip, depending on your selected dates, with average Austrian Airlines deals seen on momondo around $735. Austrian Airlines operates 21 flights to San Francisco from London Heathrow Airport in an average week. Users have rated it 7.6/10 across 823 reviews.

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Carmel-by-the-Sea
Modesto
Calistoga
Hayward
Bodega Bay
Sonoma
Roseville
Santa Clara
Big Sur
Daly City
Berkeley
Walnut Creek
Fremont
Half Moon Bay
South San Francisco
Redwood City
Vallejo
Sunnyvale
Pacific Grove

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to San Francisco for you.

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

Yes. momondo allows you to filter the results for London to San Francisco flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to San Francisco.

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

Price alerts on flights to San Francisco from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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