LHR - SFO

₹ 41,322 Find Cheap Flights from London to San Francisco

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to San Francisco departing on 23/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to San Francisco, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to San Francisco, as well as popular online travel agencies
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Cheap Flights from London to San Francisco (LHR-SFO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Heathrow to San Francisco

Thu, 23 Oct - Thu, 6 Nov
Scandinavian Airlines Logo
06:40 - 16:30LHR-SFO
17h 50m1 stop
Scandinavian Airlines Logo
16:40 - 18:30SFO-LHR
17h 50m1 stop
₹ 41,322Scandinavian Airlines
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Sat, 1 Nov - Fri, 7 Nov
Scandinavian Airlines Logo
06:40 - 15:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
16:40 - 16:00SFO-LHR
15h 20m1 stop
₹ 41,408Scandinavian Airlines
Find Deal
Tue, 9 Sep - Mon, 22 Sep
British Airways Logo
14:15 - 17:25LHR-SFO
11h 10mdirect
British Airways Logo
15:59 - 12:50SFO-LHR
12h 51m1 stop
₹ 45,258British Airways
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Tue, 28 Oct - Tue, 11 Nov
British Airways Logo
11:45 - 16:00LHR-SFO
11h 15mdirect
British Airways Logo
16:28 - 13:20SFO-LHR
12h 52m1 stop
₹ 45,343British Airways
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Wed, 24 Sep - Wed, 1 Oct
Delta Logo
06:30 - 11:45LHR-SFO
13h 15m1 stop
Delta Logo
21:20 - 15:40SFO-LHR
10h 20mdirect
₹ 45,429Delta
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Tue, 26 Aug - Thu, 11 Sep
Delta Logo
16:25 - 19:30LHR-SFO
11h 05mdirect
Delta Logo
21:20 - 15:40SFO-LHR
10h 20mdirect
₹ 45,857Delta
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Sun, 7 Sep - Sun, 14 Sep
United Airlines Logo
07:25 - 19:00LHR-SFO
19h 35m1 stop
United Airlines Logo
16:05 - 10:25SFO-LHR
10h 20mdirect
₹ 51,076United Airlines
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Sat, 23 Aug - Fri, 12 Sep
United Airlines Logo
09:30 - 20:10LHR-SFO
18h 40m2 stops
United Airlines Logo
19:55 - 14:10SFO-LHR
10h 15mdirect
₹ 51,674United Airlines
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Fri, 10 Oct - Sun, 25 Jan
Virgin Atlantic Logo
11:15 - 14:15LHR-SFO
11h 00mdirect
Virgin Atlantic Logo
22:45 - 20:10SFO-LHR
13h 25m1 stop
₹ 56,380Virgin Atlantic
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Mon, 23 Jun - Mon, 7 Jul
Virgin Atlantic Logo
16:25 - 19:30LHR-SFO
11h 05mdirect
Virgin Atlantic Logo
21:20 - 15:40SFO-LHR
10h 20mdirect
₹ 56,808Virgin Atlantic
Find Deal
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KAYAK's insights & trends for Heathrow to San Francisco flights

Get data-powered insights and trends into flights from Heathrow to San Francisco to help you find the cheapest flights, the best time to fly and much more.

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

The average price of all round-trip flights from London Heathrow Airport to San Francisco clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from London to San Francisco, look for departures on Thursdays and avoid leaving on a Wednesday, as it's usually the priciest day. When flying back from San Francisco, Sunday is the cheapest day to fly and Tuesday is the most expensive.

What is the cheapest month to fly from London Heathrow Airport to San Francisco?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to San Francisco, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London Heathrow Airport to San Francisco is February, where tickets cost ₹ 48,509 (return) on average. On the other hand, the most expensive months are August and July, where the average cost of round-trip tickets is ₹ 80,249 and ₹ 78,453 respectively.

Can I save money by flying with a stopover from London Heathrow Airport to San Francisco?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 2 stops stopover the cheapest option at ₹ 51,064 on average.

How far in advance should I book a flight from London Heathrow Airport to San Francisco?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to San Francisco, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from London Heathrow Airport to San Francisco, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.


Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight₹ 41,322
Best time to beat the crowds (8% less expensive on average)
Most popular time to fly (33% more expensive on average)
Flight from London to San Francisco

When to book flights from Heathrow to San Francisco

Are your dates flexible? Find out the best times to travel from Heathrow to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Flights from Heathrow to San Francisco: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from Heathrow to San Francisco 
AlastairFlew with British AirwaysLHR-SFOFeb 2025
Make sure your free checked luggage is for outward and return flights.
Verified travelerFlew with United AirlinesLHR-SFOSept 2024
Download all your music. Add shows and movies to your queue. Bring short so you can relax. Bring long charger cords.
Verified travelerFlew with American AirlinesLHR-SFOMar 2024
Heathrow is vast, allow plenty of time to drop bags and go through security. At San Francisco the immigration takes a bit of time and we had to wait around 1.5hrs, bare this in mind when booking car rental. The is a shuttle train from the airport to the car rental area which is very slick and efficient.
Ana-MariaFlew with IberiaLHR-SFOMar 2024
In London triple check your flight they have multiple leaving for the same destination once - it is easy to get them confused

FAQs for booking London to San Francisco flights

  • Is Heathrow family friendly?

    Heathrow Airport has at least one children’s play area in every terminal and most restaurants do children’s menus, and some promise to serve food within 15min. You can pre-order nappies and baby milk via the on-site chemist in each terminal, which reduces the need to carry more things through security.

  • How many airports are there in San Francisco and how many have direct routes from London?

    There are three airports in the San Francisco Bay area: San Francisco International Airport (SFO), Oakland International Airport (OAK) and San Jose International Airport (SJC). SFO is the airport that has more international airline options while Oakland and San Jose have more low-cost carriers and domestic routes. Both British Airways and Virgin fly non-stop to San Francisco SFO Airport from London Heathrow.

  • What is the best way to travel to London Heathrow to catch my plane to San Francisco SFO?

    There are two trains from central London, leaving Paddington station; the Heathrow Express takes 15min, non-stop and the Heathrow Connect takes 30min with a few stops. It is also very straightforward to catch the London Underground - the journey takes about an hour from central London.

  • Once landed from London Heathrow, what is the best way to travel into San Francisco using public transport?

    The Bay Area Rapid Transit (BART) is easy, taking 30min, with trains leaving 3-4 times every hour. Passengers can connect to the BART from any of the terminals via the free Air Train. BART trains run from 5:00 in the week, 6:00 on Saturdays, and 8:00 on Sundays and stop at midnight every day. There are also buses that run from San Francisco SFO Airport to various parts of the state. For example, the Evans Airport shuttle serves Napa, the Marin Airporter goes into Marin County and the Sonoma County Airport Express carries passengers to Sonoma County.

  • What is the cheapest flight from London Heathrow Airport to San Francisco?

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to San Francisco was ₹ 532 for a one-way ticket and ₹ 483 for a return.

  • Which airlines offer Wi-Fi service onboard planes from London to San Francisco?

    Only KLM offers inflight Wi-Fi service on the London to San Francisco flight route.

  • Which aircraft models fly most regularly from London to San Francisco?

    The Boeing 777 is the aircraft model that flies most regularly on the London to San Francisco flight route.

  • Which airline alliances offer flights from London to San Francisco?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between London and San Francisco, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from London to San Francisco?

    There are direct flights from London to San Francisco on a daily basis.

  • Which is the best airline for flights from London to San Francisco, United Airlines or Virgin Atlantic?

    The two airlines most popular with KAYAK users for flights from London to San Francisco are United Airlines and Virgin Atlantic. With an average price for the route of ₹ 90,419 and an overall rating of 7.4, United Airlines is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of ₹ 52,172 and an overall rating of 7.4.

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

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to San Francisco.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from London is likely to change within 7 days, so travellers know whether to wait or book now.

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to San Francisco with an airline and back to London with another airline.

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

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from London Heathrow Airport to San Francisco

  • London Heathrow (LHR) is one of the busiest airports in the world, so make sure to check your terminal in advance as distances between the terminals can be long if you make a mistake, and the journey between them can take more time than you think.
  • Download the London Heathrow app onto your telephone before you leave, as this will update you in real-time on delays, and also help you easily navigate the terminals to find restaurants, services and your boarding gate.
  • If you are pushed for time but very hungry, look out for the 15-minute symbol at many of the eateries at Heathrow Airport; these places will take your order and deliver your food within 15min.
  • If you find yourself with lots of time to spare before your flight, head to the Number 1 Lounge in Terminal 3 after security – as well as food, newspapers and drink, it also has a travel spa and sleep pods that can be reserved by the hour.
  • When planning your flight into San Francisco SFO Airport, remember that because it’s so close to the coast, it is prone to being foggy, which means that landing and take-off capacity becomes frequently limited. Make sure you factor in some extra landing time in your arrival schedule for unforeseen weather delays; it’s all part of the wonder of arriving in the area.

Prefer to fly direct from London Heathrow to San Francisco?

Find which airlines fly direct from London Heathrow Airport to San Francisco Airport, which days they fly and book direct flights.

Direct departures

London Heathrow to San Francisco

Monday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

Tuesday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

Wednesday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

Thursday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

Friday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

Saturday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

Sunday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

See more direct flights

Direct returns

San Francisco to London Heathrow

Monday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

Tuesday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

Wednesday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

Thursday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

Friday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

Saturday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

Sunday

Aer Lingus, Aeromexico, Air Canada, +15 more

Aer Lingus, Aeromexico, +16 more

See more direct flights
See more direct flights

Top 3 airlines serving from Heathrow to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from London to San Francisco. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Heathrow to San Francisco? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8790 reviews
6.6Food
7.7Boarding
7.3Comfort
7.0Entertainment
8.1Crew
Airline reviews

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

8.0 ExcellentLawrence, Jun 2025HNL - SFO
Read more United Airlines reviews

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

United out of SFO is having issues with catering so none of our meals were loaded on the plane and no offer of compensation for our tickets purchased was offered.

Its good expeince but in enternteiment please be like you tube the music i like or movie

I needed to make changes to my flights. When I called customer service, they assisted me with care professionalism.

A bit rush for transit. Food and entertainment are not available

The gate was too far away for the connecting flight

Generally good. The aisles have gotten narrower which can slow down boarding. Flight crew was great! Healthier complimentary snacks would be appreciated. Due to earthquake in San Francisco we had to circle in air space for a bit but then had a smooth landing. I laud the flight crew for their patience ;)

headphone jack didnt work for the first flight and not much variety

The agents was very rude and they charged me $50 for a carry-on bag saying that it was too big and then I saw someone going on a plane with the same size bag as me

Super friendly and helpful staff, from check-in desk to cabin crew.

Following a paid seat upgrade for enhanced comfort, I encountered an unacceptable odor in my assigned area. It took three hours for the crew to relocate me, and the replacement seat was unacceptably close to the lavatory, offering no improvement.

Good overall. Cannot fault the airlines. I have had better entertainment systems before ie ice in Emirates but it was not too bad. Food was decent and staff were friendly.

I did not fly by vergin atlantic from bangalore to vasco da gama

Your flight delayed at Heathrow n I almost missed my mother funeral.you idiots. I had to waste 10 hours in different airports. Thank your stars I'm not suing you.

Miami airport needs more thorough signage. It was a long walk from my transport point to the check in desk,

Flight took off an hour late. Had to stay on the tarmac for half an hour after landing. Both annoying.

We had an unfortunate experience where we had to leave the aircraft after boarding, shortly before the scheduled takeoff time, and re-board. The reason given was that a passenger felt ill and had to cancel their plans and therefor their luggage had to be found and removed.

We’ve used VA before many times the experience is always been good they have lovely staff and the food is always delicious.

Everything about the flight was amazing from check in to boarding entertainment was okay food we didn’t try.

Better synchronizing the boarding processes. The audio announcements, the personnel and the digital signage were not saying the same thing. All confusion.

The first class seats were unusable, mine at the end of the flight, my husband's in the middle of the flight, and the one next to me was unusable either, they had to move the person to another seat.

Last minute gate change. Didn’t put our TSA global on our trip even though we asked multiple times to confirm. Did not help with food when could not eat what was served.

The cabin was bit colder than I like but the crew members looked after us very well. They did even offer hot water bottle and hot chocolate. I cannot rate the crew enough excellent is not good enough. They really were wonderful.

Boarding is always a challenge as folks in al groups crowd around for no reason, but crew handled it well. I once again applaud the LHR ground baggage staff as they got our bags from a flight at Terminal 5A to a flight in Terminal 5C within 40 minutes...amazing!

This flight from London to Chicago was actually on an AA airline. I did book through BA but the flight was AA. Great flight, hectic in Chicago, I wouldn't choose to fly through Chicago again, but that's not the airlines fault. The flight itself was great.

Push back is not working when I complaint a male staff he told me that most of the seats are like that so we can’t do anything

Seats were way too small. I got claustrophobic waiting for trash from meal to be taken away. I couldn't move to even close my tray until trash was taken.

Boarding was fairly chaotic. One of your employees clipped my ankle as he was passing with an empty wheelchair and not only did not apologize but stated something to the effect of “oh forGod’s sake.” There was plenty of room for him to pass. otherwise, everything was excellent.

Fantastic! Great seats! Friendly staff! Amazing selection of shows and movies! Smooth ride! I don’t know what more I could have asked for honestly. They made flying a breeze this time around.

Everything you need to know for your flight from Heathrow to San Francisco

Information on your arrival and departure airports

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