Our website uses cookies for technical, analytical and marketing purposes. Here is more information. If you agree to this, just keep browsing. close

Find Cheap Flights from San Francisco to London Heathrow (SFO - LHR)

Search hundreds of travel sites at once for deals on flights to London Heathrow

Sat 21/10
Sat 28/10
Any month
Compare vs KAYAK |

Good to know

Low season:
October
Best time to beat the crowds
2%
expected price decrease
High season:
July
Most popular time to fly
11%
expected price increase
Average price:
£872
(avg. price over the last 72 hours)
Good deal:
£871
or less return trip within
3 months
of travel is a good deal

When to Book Flights from San Francisco to London Heathrow

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

Top tips for Finding a Cheap Flight

The cheapest flight from San Francisco to London Heathrow was found, on average, 71 days before departure.
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 October.
Morning departure is around 17% cheaper 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 San Francisco to London Heathrow Flights

How long does a flight from San Francisco to London Heathrow take?
An average non-stop flight takes 10h 10m, covering a distance of 5355 miles.
How many flights are there between San Francisco and London Heathrow?
There are 643 (non-stop) flights between San Francisco and London Heathrow per week, averaging 90 per day.
Which airlines provide the cheapest flights from San Francisco to London Heathrow?
In the past 3 days, the cheapest return tickets were found on Multiple Airlines (£234), British Airways (£423) and Virgin Atlantic (£426).
Do I need a passport to fly between San Francisco and London Heathrow?
Yes.
Which airlines fly most frequently between San Francisco and London Heathrow?
Air New Zealand (11 times daily), Delta (6 times daily), Virgin Atlantic (6 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly from San Francisco to London Heathrow?
For San Francisco to London Heathrow, Wednesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from London Heathrow back to San Francisco, the best deals are generally found on Tuesday, with Friday being the most expensive.

Book cheap flights from San Francisco to London Heathrow (return)

Airports
Origin
San Francisco
£234
only
£234
Destination
London
£234
only
£234
Wed, 29 Nov
SFO
LHR
10h 10m
Wed, 13 Dec
LHR
SFO
14h 45m
£234
Trip: 15 days
Overall 0.0 Poor
Based on 0 reviews
Sun, 14 Jan
SFO
LHR
10h 35m
Thu, 25 Jan
LHR
SFO
11h 20m
£423
Trip: 12 days
7.7GoodShow reviews
Overall 7.7 Good
Based on 180 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
SFO
LHR
Mediocre 2.3

Nothing

Seats are ver very bad no good food no good Sevres

SFO
LHR
Good 6.3

After taking off in San Francisco flight got re-routed to Minneapolis because of a sick passenger on board. Caused me to miss my connection in London and the subsequent flight I was put on because of the delay. Spent 10 hours overnihht at Heathrow in London because British Airways wasn't giving out hotel vouchers just £15 in meal vouchers. Disappointing.

SFO
LHR
Excellent 8.0

Aircraft

Food

SFO
LHR
Good 6.3

Food was good. I liked that boarding And check-in went quickly.

The pilot flew too close to a lightning storm near South Dakota. Really bad turbulence as dinner was being served. It was quite scary and my wife and I lost our appetite. Attendants were also slow to pick up our trays afterward.

SFO
LHR
Excellent 10.0

Excellent food and service.

Seats were too tight on the A380.

Sun, 19 Nov
SFO
LHR
10h 10m
Sat, 2 Dec
LHR
SFO
11h 05m
£426
Trip: 14 days
8.2ExcellentShow reviews
Overall 8.2 Excellent
Based on 35 reviews
Overall
8.1
Boarding
8.3
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
SFO
LHR
Excellent 8.3

Good entertainment, food and in-flight crew

Because this flight was delayed it was a miracle (involving running til my throat literally bled) that I made my connection. Ground crew could not have been less helpful - even to my friend who they knew was trying to get home to attend a family funeral.

SFO
LHR
Excellent 8.3

Attentive, friendly crew

Delay, small seats

SFO
LHR
OK 5.3

Crew

A plane from 1960? No entertainment center!

SFO
LHR
Excellent 10.0

Having partied until 6am for New Years I was grateful for a bed on the flight home! Fantastic crew, planes and overall service!

Wish the arrivals lounge was open for flights arriving in the afternoon.

SFO
LHR
Excellent 10.0

I felt that they were very thoughtful about the fact that it was a long flight. We got two small meals, which was perfect, and even a little gift bag with a sleep mask and toothbrush and such in it. These were just a couple of the many nice touches included in the flight.

Very small quibble: the screen resolution, or maybe the contrast, of the personal video players was not so great. This was fine in most cases, but it meant I could not watch videos that had subtitles. Not a big deal but possibly worth fixing. Thanks

Sun, 29 Apr
SFO
LHR
10h 25m
Sun, 6 May
LHR
SFO
15h 00m
£430
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 26 reviews
Overall
7.9
Boarding
8.0
Comfort
7.5
Crew
8.3
Entertainment
7.3
Food
7.2
SFO
LHR
Excellent 9.3

Very pleasant and efficient crew

Departing 50 minutes late. However, most of the time was made up enroute

SFO
LHR
Excellent 8.6

Good flight, really good new A380 aircraft, smooth nearly all the way, usual small seating space as on All airlines

Routine airline food.

SFO
LHR
Excellent 8.0

I last traveled on British Airways in May of last year (2015) and the food was beyond dreadful. Therefore I was very pleasantly surprised that there has been a huge improvement. They were very generous with the drinks and the food was plentiful and quite a reasonable standard for airline food (they gave two full meals from San Francisco to London, whereas most airlines give one meal and one snack on that route). They actually checked us in on the earlier side, we took off very promptly and got to London early. It was nice to be on time for a change - so often I find airlines run a bit late. Staff were all pleasant and helpful. Pilot's messages were pleasant, friendly and even a bit informative.

Web check-in ahead of time was a total disaster. I got an email telling me I could check in 36 hours early and "secure a good seat" but neither of the 2 sets of codes they provided in the email would work because it was all about Finnair but actually the flight was being run by British Airways. I spent about 30 minutes on the 'phone trying to get the appropriate sequence of numbers and letters to enter so as to check in and get a good seat - still nothing worked. This was at 5:45am - I regretted the time spent when I could have gone back to sleep. My daughter later spent a further 90 minutes trying to figure it out, only to be told finally that our only option was to get to the airport early and check n there which was what we did. It was beyond irksome. Please note, if the airline actually flying is different fro the booking airline, the locator number for check n will be DIFFERENT and needs to be provided to the customer to avoid a great deal of hassle and confusion. We gt particularly unlucky because BA computers had a glitch that day but the general point still stands.

SFO
LHR
OK 5.3

It was relatively inexpensive. I didn't mind the food/

This flight was operated by BA. Seats were incredibly uncomfortable. When the guy in front of me reclined his head was practically in my lap. TV's were crappy and the in-flight selection was mediocre. In flights announcements were very loud through headphones.

HEL
ORD
Excellent 9.0

People, service and food were great. Everyone had free blankets, pI'll own and earbuds. Cost was also great.

Seats a little tight.

Wed, 6 Dec
SFO
LHR
10h 15m
Wed, 13 Dec
LHR
SFO
15h 33m
£234
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Thu, 18 Jan
SFO
LHR
10h 10m
Thu, 1 Feb
LHR
SFO
16h 40m
£234
Trip: 15 days
Overall 0.0 Poor
Based on 0 reviews
Thu, 1 Mar
SFO
LHR
10h 10m
Sat, 17 Mar
LHR
SFO
21h 50m
£234
Trip: 16 days
Overall 0.0 Poor
Based on 0 reviews
Fri, 9 Mar
SFO
LHR
10h 10m
Fri, 16 Mar
LHR
SFO
17h 40m
£234
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Fri, 16 Mar
SFO
LHR
10h 15m
Sun, 25 Mar
LHR
SFO
22h 45m
£234
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Sat, 17 Mar
SFO
LHR
10h 10m
Sat, 24 Mar
LHR
SFO
21h 50m
£234
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Sun, 19 Nov
SFO
LHR
10h 10m
Mon, 27 Nov
LHR
SFO
23h 00m
£236
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Wed, 28 Feb
SFO
LHR
10h 35m
Thu, 15 Mar
LHR
SFO
11h 15m
£423
Trip: 15 days
7.7GoodShow reviews
Overall 7.7 Good
Based on 180 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
SFO
LHR
Good 6.0

Aisle seat

No leg room

SFO
LHR
Excellent 10.0

Excellent food and service.

Seats were too tight on the A380.

SFO
LHR
Excellent 8.0

Aircraft

Food

SFO
LHR
Excellent 10.0

More legroom would have been nice

SFO
LHR
OK 4.3

Storage bins next to seat in world traveller plus

Lack of seinking water and no toilet in the world traveller plus cabin - curtains divided off the area blocking access to any toilets!

Tue, 21 Nov
SFO
LHR
10h 10m
Fri, 1 Dec
LHR
SFO
11h 05m
£426
Trip: 11 days
8.2ExcellentShow reviews
Overall 8.2 Excellent
Based on 35 reviews
Overall
8.1
Boarding
8.3
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
SFO
LHR
Excellent 8.3

Good entertainment, food and in-flight crew

Because this flight was delayed it was a miracle (involving running til my throat literally bled) that I made my connection. Ground crew could not have been less helpful - even to my friend who they knew was trying to get home to attend a family funeral.

SFO
LHR
Excellent 10.0

Having partied until 6am for New Years I was grateful for a bed on the flight home! Fantastic crew, planes and overall service!

Wish the arrivals lounge was open for flights arriving in the afternoon.

SFO
LHR
Excellent 10.0

I felt that they were very thoughtful about the fact that it was a long flight. We got two small meals, which was perfect, and even a little gift bag with a sleep mask and toothbrush and such in it. These were just a couple of the many nice touches included in the flight.

Very small quibble: the screen resolution, or maybe the contrast, of the personal video players was not so great. This was fine in most cases, but it meant I could not watch videos that had subtitles. Not a big deal but possibly worth fixing. Thanks

SFO
LHR
Mediocre 3.6

first time I flew VirginAtlantic. Heard so many good things about it. It fact even our Uber driver was praising the airline on our way to the airport. But once onboard: - poor food (I mean 'survival kit' style) - entertainment station was not working - games feel like 20 years old - design (heavy red) now looks dated and suffocating - hostesses are more focused on their hairstyle than their customers

Back to Air France next time!

SFO
LHR
Excellent 10.0

Very attentive and friendly crew! The plane was nice and clean, nice purple tinted lights. They served us plenty of complementary meals, snacks, mints and drinks. The in flight entertainment was the best I've seen yet: movies, tv, music, games, all recent and easy to use. We will definitely fly Virgin Atlantic again!

Wed, 25 Apr
SFO
LHR
10h 25m
Sun, 6 May
LHR
SFO
15h 00m
£433
Trip: 12 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 26 reviews
Overall
7.9
Boarding
8.0
Comfort
7.5
Crew
8.3
Entertainment
7.3
Food
7.2
SFO
LHR
Excellent 8.0

I last traveled on British Airways in May of last year (2015) and the food was beyond dreadful. Therefore I was very pleasantly surprised that there has been a huge improvement. They were very generous with the drinks and the food was plentiful and quite a reasonable standard for airline food (they gave two full meals from San Francisco to London, whereas most airlines give one meal and one snack on that route). They actually checked us in on the earlier side, we took off very promptly and got to London early. It was nice to be on time for a change - so often I find airlines run a bit late. Staff were all pleasant and helpful. Pilot's messages were pleasant, friendly and even a bit informative.

Web check-in ahead of time was a total disaster. I got an email telling me I could check in 36 hours early and "secure a good seat" but neither of the 2 sets of codes they provided in the email would work because it was all about Finnair but actually the flight was being run by British Airways. I spent about 30 minutes on the 'phone trying to get the appropriate sequence of numbers and letters to enter so as to check in and get a good seat - still nothing worked. This was at 5:45am - I regretted the time spent when I could have gone back to sleep. My daughter later spent a further 90 minutes trying to figure it out, only to be told finally that our only option was to get to the airport early and check n there which was what we did. It was beyond irksome. Please note, if the airline actually flying is different fro the booking airline, the locator number for check n will be DIFFERENT and needs to be provided to the customer to avoid a great deal of hassle and confusion. We gt particularly unlucky because BA computers had a glitch that day but the general point still stands.

SFO
LHR
Excellent 9.3

Very pleasant and efficient crew

Departing 50 minutes late. However, most of the time was made up enroute

SFO
LHR
Excellent 8.6

Good flight, really good new A380 aircraft, smooth nearly all the way, usual small seating space as on All airlines

Routine airline food.

CDG
HEL
Good 7.6

Service was good

Sitting in last row of business, coach passengers talking loud, bumping and kicking my seat back. I wouldn't call it business at all.

SFO
LHR
OK 5.3

No leg room, flight attentend ignored me twice and I had to get up to get a answer from him.

Thu, 23 Nov
SFO
LHR
10h 15m
Thu, 7 Dec
LHR
SFO
15h 33m
£236
Trip: 15 days
Overall 0.0 Poor
Based on 0 reviews
Thu, 23 Nov
SFO
LHR
10h 10m
Sat, 9 Dec
LHR
SFO
11h 05m
£426
Trip: 17 days
8.2ExcellentShow reviews
Overall 8.2 Excellent
Based on 35 reviews
Overall
8.1
Boarding
8.3
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
SFO
LHR
Excellent 9.3

Good notification re a 30 Minute delay. Obtaining board passes was a breeze and love where I can save the passes to my wallet on my mobile device. Flight crews were helpful, cheerful and professional.

With seats being so tight causing an issue when getting in and out of seats.

SFO
LHR
OK 5.3

Crew

A plane from 1960? No entertainment center!

SFO
LHR
Excellent 8.0

There were lots of choices of movies. The flight was only half full, so I got two seats together to stretch out.

The cups for water and juice were very small.

SFO
LHR
Excellent 8.3

Attentive, friendly crew

Delay, small seats

SFO
LHR
Excellent 10.0

Very attentive and friendly crew! The plane was nice and clean, nice purple tinted lights. They served us plenty of complementary meals, snacks, mints and drinks. The in flight entertainment was the best I've seen yet: movies, tv, music, games, all recent and easy to use. We will definitely fly Virgin Atlantic again!

Thu, 12 Apr
SFO
LHR
16h 10m
Sat, 5 May
LHR
SFO
11h 00m
£429
Trip: 24 days
7.7GoodShow reviews
Overall 7.7 Good
Based on 180 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
SFO
LHR
Good 6.3

After taking off in San Francisco flight got re-routed to Minneapolis because of a sick passenger on board. Caused me to miss my connection in London and the subsequent flight I was put on because of the delay. Spent 10 hours overnihht at Heathrow in London because British Airways wasn't giving out hotel vouchers just £15 in meal vouchers. Disappointing.

SFO
LHR
Excellent 8.0

I love the bins by the side of the Airbus, and for an economy seat there was a good amount of leg room.

SFO
LHR
OK 4.3

Storage bins next to seat in world traveller plus

Lack of seinking water and no toilet in the world traveller plus cabin - curtains divided off the area blocking access to any toilets!

SFO
LHR
Good 6.3

Food was good. I liked that boarding And check-in went quickly.

The pilot flew too close to a lightning storm near South Dakota. Really bad turbulence as dinner was being served. It was quite scary and my wife and I lost our appetite. Attendants were also slow to pick up our trays afterward.

SFO
LHR
Mediocre 2.3

Nothing

Seats are ver very bad no good food no good Sevres

Sat, 28 Apr
SFO
LHR
13h 15m
Sun, 6 May
LHR
SFO
15h 00m
£434
Trip: 9 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 26 reviews
Overall
7.9
Boarding
8.0
Comfort
7.5
Crew
8.3
Entertainment
7.3
Food
7.2
SFO
LHR
OK 5.3

No leg room, flight attentend ignored me twice and I had to get up to get a answer from him.

SFO
LHR
Excellent 9.6

Having read horror stories online about booking with Kayak's partner Justfly, I was prepared for the worst (last-minute cancellations, partial refunds, all-around crummy service). Actually, my Finnair flight was great - it was operated by BA, so it was a nice new double-decker Airbus plane. It was maybe 3/4ths full, so I nearly had a row to myself - shoutout to the jerk who decided he was entitled to the aisle seat. The flight was smooth and easy and best of all, it cost a fraction of what the BA price for a one-way from SFO to LHR cost.

The food on BA continues to be meh, but what most people don't realize is that ALL airline food is meh, because your tastebuds don't work properly 30k feet in the air (it's a scientific fact).

HEL
ORD
Excellent 9.0

People, service and food were great. Everyone had free blankets, pI'll own and earbuds. Cost was also great.

Seats a little tight.

SFO
LHR
Excellent 8.0

I last traveled on British Airways in May of last year (2015) and the food was beyond dreadful. Therefore I was very pleasantly surprised that there has been a huge improvement. They were very generous with the drinks and the food was plentiful and quite a reasonable standard for airline food (they gave two full meals from San Francisco to London, whereas most airlines give one meal and one snack on that route). They actually checked us in on the earlier side, we took off very promptly and got to London early. It was nice to be on time for a change - so often I find airlines run a bit late. Staff were all pleasant and helpful. Pilot's messages were pleasant, friendly and even a bit informative.

Web check-in ahead of time was a total disaster. I got an email telling me I could check in 36 hours early and "secure a good seat" but neither of the 2 sets of codes they provided in the email would work because it was all about Finnair but actually the flight was being run by British Airways. I spent about 30 minutes on the 'phone trying to get the appropriate sequence of numbers and letters to enter so as to check in and get a good seat - still nothing worked. This was at 5:45am - I regretted the time spent when I could have gone back to sleep. My daughter later spent a further 90 minutes trying to figure it out, only to be told finally that our only option was to get to the airport early and check n there which was what we did. It was beyond irksome. Please note, if the airline actually flying is different fro the booking airline, the locator number for check n will be DIFFERENT and needs to be provided to the customer to avoid a great deal of hassle and confusion. We gt particularly unlucky because BA computers had a glitch that day but the general point still stands.

SFO
LHR
OK 5.3

It was relatively inexpensive. I didn't mind the food/

This flight was operated by BA. Seats were incredibly uncomfortable. When the guy in front of me reclined his head was practically in my lap. TV's were crappy and the in-flight selection was mediocre. In flights announcements were very loud through headphones.

Fri, 1 Dec
SFO
LHR
10h 15m
Thu, 14 Dec
LHR
SFO
15h 33m
£236
Trip: 14 days
Overall 0.0 Poor
Based on 0 reviews
Fri, 24 Nov
SFO
LHR
10h 15m
Fri, 8 Dec
LHR
SFO
11h 05m
£426
Trip: 15 days
8.2ExcellentShow reviews
Overall 8.2 Excellent
Based on 35 reviews
Overall
8.1
Boarding
8.3
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.8
SFO
LHR
Excellent 10.0

Very attentive and friendly crew! The plane was nice and clean, nice purple tinted lights. They served us plenty of complementary meals, snacks, mints and drinks. The in flight entertainment was the best I've seen yet: movies, tv, music, games, all recent and easy to use. We will definitely fly Virgin Atlantic again!

SFO
LHR
OK 5.3

Crew

A plane from 1960? No entertainment center!

SFO
LHR
Excellent 8.0

There were lots of choices of movies. The flight was only half full, so I got two seats together to stretch out.

The cups for water and juice were very small.

SFO
LHR
Excellent 8.3

Attentive, friendly crew

Delay, small seats

SFO
LHR
Excellent 9.3

A large selection of movies, shows and music to choose from. Flight crews were attentive and friendly.

The narrow space between each rows for passengers to move from their seats.

Show more results
*
Prices are per person, are for e–tickets and include all taxes & fees in GBP.

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 prices, so it’s not possible for us to guarantee what other companies are selling.

We aggregate tons 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 don't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car hires 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.

More questions or if you have a bad price to report to us
Please send us an email 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.