Find cheap flights from London Heathrow Airport to San Francisco

LHR - SFO

Find cheap flights from London Heathrow Airport to San Francisco

Round-trip
Economy
London (LHR)
San Francisco
Fri 7/31
Fri 8/7
Any month
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Good to know

Low season

February Best time to beat the crowds with an average 22% drop in price.

High season

July Most popular time to fly with an average 38% increase in price.

Average price of a round-trip

$496 (avg. price over the last 2 weeks)

Good deal for a round-trip

$454 or less

When to book flights from London Heathrow to San Francisco

Estimated round-trip price
Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for finding a cheap flight

  • Looking for a cheap flight? 25% of our users found flights on this route for $410 or less.
  • The cheapest flight from London Heathrow Airport to San Francisco was found 88 days before departure, on average.
  • Book at least 3 weeks before departure in order to get a below-average price.
  • High season is considered to be June, July and August. The cheapest month to fly is February.
  • Morning departure is around 25% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking London Heathrow Airport to San Francisco flights

How long does a flight from London Heathrow Airport to San Francisco take?

How many flights are there between London Heathrow Airport and San Francisco?

Which airlines provide the cheapest flights from London Heathrow Airport to San Francisco?

Do I need a passport to fly between London Heathrow Airport and San Francisco?

Which airlines fly most frequently between London Heathrow Airport and San Francisco?

What’s the cheapest day of the week to fly London Heathrow Airport to San Francisco?

How does KAYAK find such low prices on flights from London Heathrow Airport to San Francisco?

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport to San Francisco?

What is the Hacker Fare option on flights from London Heathrow Airport to San Francisco?

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Heathrow Airport to San Francisco?

Top 5 airlines serving London Heathrow to San Francisco

Scores according to KAYAK customer reviews

8.1
Virgin Atlantic
Overall score based on 1,566 reviews
8.3
Boarding
7.8
Comfort
8.6
Crew
8.0
Entertainment
7.8
Food
Airline reviews
Read more about Virgin Atlantic

Book cheap flights from London Heathrow Airport to San Francisco (round-trip)

Airports
Origin
London
$206
only
$206
Destination
San Francisco
$206
only
$206
Tue, Dec 29
LHR
London Heathrow Airport
SFO
San Francisco Airport
11h 20m
Tue, Jan 12
SFO
San Francisco Airport
LHR
London Heathrow Airport
10h 15m
Trip: 15 days
Based on null reviews
Tue, Oct 6
LHR
London Heathrow Airport
SFO
San Francisco Airport
27h 55m
Sun, Oct 18
SFO
San Francisco Airport
LHR
London Heathrow Airport
17h 15m
Trip: 13 days
Based on null reviews
Tue, Oct 6
LHR
London Heathrow Airport
SFO
San Francisco Airport
33h 45m
Sun, Oct 18
SFO
San Francisco Airport
LHR
London Heathrow Airport
17h 15m
Trip: 13 days
Based on null reviews
Tue, Dec 29
LHR
London Heathrow Airport
SFO
San Francisco Airport
15h 20m
Sun, Jan 10
SFO
San Francisco Airport
LHR
London Heathrow Airport
14h 10m
Trip: 13 days
Based on null reviews
Sun, Nov 1
LHR
London Heathrow Airport
SFO
San Francisco Airport
42h 38m
Thu, Nov 26
SFO
San Francisco Airport
LHR
London Heathrow Airport
15h 25m
Trip: 26 days
Based on null reviews
Tue, Dec 29
LHR
London Heathrow Airport
SFO
San Francisco Airport
11h 20m
Tue, Jan 12
SFO
San Francisco Airport
LHR
London Heathrow Airport
13h 20m
Trip: 15 days
Based on null reviews
Tue, Oct 13
LHR
London Heathrow Airport
SFO
San Francisco Airport
18h 59m
Wed, Dec 2
SFO
San Francisco Airport
LHR
London Heathrow Airport
13h 15m
Trip: 51 days
Based on null reviews
Wed, Oct 7
LHR
London Heathrow Airport
SFO
San Francisco Airport
16h 40m
Sun, Oct 18
SFO
San Francisco Airport
LHR
London Heathrow Airport
18h 20m
Trip: 12 days
Based on null reviews
Tue, Nov 10
LHR
London Heathrow Airport
SFO
San Francisco Airport
15h 20m
Mon, Nov 16
SFO
San Francisco Airport
LHR
London Heathrow Airport
15h 25m
Trip: 7 days
Based on null reviews
Tue, Oct 6
LHR
London Heathrow Airport
SFO
San Francisco Airport
26h 50m
Sun, Oct 18
SFO
San Francisco Airport
LHR
London Heathrow Airport
22h 25m
Trip: 13 days
Based on null reviews
Tue, Dec 29
LHR
London Heathrow Airport
SFO
San Francisco Airport
14h 20m
Tue, Jan 12
SFO
San Francisco Airport
LHR
London Heathrow Airport
13h 15m
Trip: 15 days
Based on null reviews
Tue, Dec 29
LHR
London Heathrow Airport
SFO
San Francisco Airport
11h 20m
Mon, Jan 11
SFO
San Francisco Airport
LHR
London Heathrow Airport
10h 15m
Trip: 14 days
Based on null reviews
Sun, Dec 27
LHR
London Heathrow Airport
SFO
San Francisco Airport
32h 50m
Mon, Jan 11
SFO
San Francisco Airport
LHR
London Heathrow Airport
10h 35m
Trip: 16 days
Based on null reviews
Tue, Dec 29
LHR
London Heathrow Airport
SFO
San Francisco Airport
14h 20m
Tue, Jan 12
SFO
San Francisco Airport
LHR
London Heathrow Airport
13h 15m
Trip: 15 days
Based on null reviews
Mon, Nov 9
LHR
London Heathrow Airport
SFO
San Francisco Airport
11h 10m
Mon, Nov 16
SFO
San Francisco Airport
LHR
London Heathrow Airport
10h 35m
Trip: 8 days
Based on null reviews
Wed, Oct 28
LHR
London Heathrow Airport
SFO
San Francisco Airport
21h 34m
Sat, Nov 14
SFO
San Francisco Airport
LHR
London Heathrow Airport
52h 20m
Trip: 18 days
Based on null reviews
Tue, Dec 29
LHR
London Heathrow Airport
SFO
San Francisco Airport
14h 20m
Tue, Jan 12
SFO
San Francisco Airport
LHR
London Heathrow Airport
13h 15m
Trip: 15 days
Based on null reviews
Tue, Dec 29
LHR
London Heathrow Airport
SFO
San Francisco Airport
15h 20m
Tue, Jan 12
SFO
San Francisco Airport
LHR
London Heathrow Airport
13h 15m
Trip: 15 days
Based on null reviews
Tue, Dec 29
LHR
London Heathrow Airport
SFO
San Francisco Airport
11h 10m
Mon, Jan 11
SFO
San Francisco Airport
LHR
London Heathrow Airport
10h 35m
Trip: 14 days
Based on null reviews
Tue, Dec 29
LHR
London Heathrow Airport
SFO
San Francisco Airport
14h 20m
Tue, Jan 12
SFO
San Francisco Airport
LHR
London Heathrow Airport
12h 44m
Trip: 15 days
Based on null reviews
Show more results

Book cheap flights from London Heathrow Airport to San Francisco (one-way)

Airports
Origin
London
$231
only
$231
Destination
San Francisco
$231
only
$231
Tue, Oct 6
LHR
London Heathrow Airport
SFO
San Francisco Airport
33h 45m
Based on null reviews
Wed, Oct 14
LHR
London Heathrow Airport
SFO
San Francisco Airport
16h 40m
Based on null reviews
Mon, Aug 31
LHR
London Heathrow Airport
SFO
San Francisco Airport
13h 15m
Based on null reviews
Mon, Aug 31
LHR
London Heathrow Airport
SFO
San Francisco Airport
16h 40m
Based on null reviews
Mon, Oct 12
LHR
London Heathrow Airport
SFO
San Francisco Airport
54h 00m
Based on null reviews
Wed, Oct 7
LHR
London Heathrow Airport
SFO
San Francisco Airport
16h 40m
Based on null reviews
Mon, Oct 5
LHR
London Heathrow Airport
SFO
San Francisco Airport
54h 00m
Based on null reviews
Tue, Oct 6
LHR
London Heathrow Airport
SFO
San Francisco Airport
26h 50m
Based on null reviews
Sat, Sep 12
LHR
London Heathrow Airport
SFO
San Francisco Airport
32h 20m
Based on null reviews
Tue, Aug 25
LHR
London Heathrow Airport
SFO
San Francisco Airport
19h 19m
Based on null reviews
Wed, Aug 26
LHR
London Heathrow Airport
SFO
San Francisco Airport
17h 39m
Based on null reviews
Wed, Sep 2
LHR
London Heathrow Airport
SFO
San Francisco Airport
20h 00m
Based on null reviews
Wed, Aug 26
LHR
London Heathrow Airport
SFO
San Francisco Airport
21h 00m
Based on null reviews
Fri, Sep 4
LHR
London Heathrow Airport
SFO
San Francisco Airport
21h 35m
Based on null reviews
Thu, Oct 1
LHR
London Heathrow Airport
SFO
San Francisco Airport
30h 05m
Based on null reviews
Sat, Oct 10
LHR
London Heathrow Airport
SFO
San Francisco Airport
32h 20m
Based on null reviews
Tue, Sep 1
LHR
London Heathrow Airport
SFO
San Francisco Airport
32h 10m
Based on null reviews
Tue, Sep 1
LHR
London Heathrow Airport
SFO
San Francisco Airport
32h 10m
Based on null reviews
Tue, Sep 22
LHR
London Heathrow Airport
SFO
San Francisco Airport
32h 10m
Based on null reviews
Sat, Sep 12
LHR
London Heathrow Airport
SFO
San Francisco Airport
32h 10m
Based on null reviews
Show more results
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

^
The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
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