LHR - SFO

₹ 31,869 Find Cheap Flights from London to San Francisco

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to San Francisco departing on 4/6. 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

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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Flights Deals

Cheap Flight Deals 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.

Recent return flight deals from Heathrow to San Francisco

KAYAK's recommended return flight deals from the most popular airlines that fly from Heathrow to San Francisco.
Discover the best prices for you by selecting your travel dates on KAYAK.
British Airways Logo
08:50 - 15:50LHR-SFO
15h 00m1 stop
British Airways Logo
16:35 - 11:00SFO-LHR
10h 25mdirect
₹ 43,565British Airways
Find Deal
Fri, 19 Sep - Tue, 23 Sep
British Airways Logo
08:50 - 15:50LHR-SFO
15h 00m1 stop
British Airways Logo
17:45 - 19:15SFO-LHR
17h 30m1 stop
₹ 44,074British Airways
Find Deal
Fri, 19 Sep - Tue, 23 Sep
KLM Logo
06:30 - 11:45LHR-SFO
13h 15m1 stop
KLM Logo
15:00 - 13:10SFO-LHR
14h 10m1 stop
₹ 44,582KLM
Find Deal
Sat, 13 Sep - Mon, 15 Sep
Delta Logo
06:30 - 11:45LHR-SFO
13h 15m1 stop
Delta Logo
16:05 - 10:15SFO-LHR
10h 10mdirect
₹ 45,854Delta
Find Deal
Thu, 25 Sep - Thu, 11 Dec
Delta Logo
16:25 - 19:30LHR-SFO
11h 05mdirect
Delta Logo
21:20 - 15:40SFO-LHR
10h 20mdirect
₹ 46,108Delta
Find Deal
Fri, 12 Sep - Mon, 15 Sep
 Logo
08:40 - 16:10LHR-SFO
15h 30m1 stop
 Logo
13:05 - 07:25SFO-LHR
10h 20mdirect
₹ 46,277
Find Deal
Wed, 10 Sep - Wed, 24 Sep
United Airlines Logo
12:10 - 16:10LHR-SFO
36h 00m1 stop
United Airlines Logo
08:36 - 11:10SFO-LHR
18h 34m1 stop
₹ 46,447United Airlines
Find Deal
Wed, 14 May - Wed, 21 May
 Logo
06:30 - 12:40LHR-SFO
14h 10m1 stop
 Logo
19:30 - 17:50SFO-LHR
14h 20m1 stop
₹ 47,040
Find Deal
Fri, 19 Sep - Tue, 23 Sep
KLM Logo
06:30 - 11:45LHR-SFO
13h 15m1 stop
KLM Logo
13:18 - 09:50SFO-LHR
12h 32m1 stop
₹ 48,566KLM
Find Deal
Thu, 19 Jun - Sat, 19 Jul
United Airlines Logo
14:10 - 23:09LHR-SFO
16h 59m1 stop
United Airlines Logo
21:15 - 20:40SFO-LHR
15h 25m1 stop
₹ 48,651United Airlines
Find Deal
Mon, 8 Sep - Mon, 15 Sep
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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 Sundays and avoid leaving on a Thursday, as it's usually the priciest day. When flying back from San Francisco, Monday 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 ₹ 47,973 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is ₹ 79,841 and ₹ 78,824 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 ₹ 158,777 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 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.


Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight₹ 31,869
Best time to beat the crowds (9% less expensive on average)
Most popular time to fly (36% 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 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 ₹ 376 for a one-way ticket and ₹ 514 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 British Airways?

    The two airlines most popular with KAYAK users for flights from London to San Francisco are United Airlines and British Airways. With an average price for the route of ₹ 76,816 and an overall rating of 7.4, United Airlines is the most popular choice. British Airways is also a great choice for the route, with an average price of ₹ 51,590 and an overall rating of 6.6.

  • 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

  • Looking for a cheap flight? 25% of our users found flights on this route for ₹ 49,140 or less round-trip.
  • 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 8696 reviews
7.3Comfort
6.6Food
7.7Boarding
7.1Entertainment
8.1Crew
Airline reviews

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

8.0 ExcellentAnonymous, Apr 2025ORD - SFO
Read more United Airlines reviews

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

For the most part united was a good experience, how ever when they came by with the snacks and water, they completely passed by my wife and I. As we were in separate rows. On a 5 hr flight we were not offered water

Fantastic crew. Flight was delayed at last minute but we were given updates every 20 minutes and the crew was so friendly and considerate. I miss the touch screens on the back of the seats, wish they would bring that back though.

Beijing PEK to SFO. I had an economy seat on this flight. The seat comfort was acceptable. My main complaint is with the FA’s lack of personality and absence from servicing the plane, specifically restroom care (I wish I could share a pic of the restroom that I captured) and care of travelers—drink cart/availability of drinks. I'm amazed at the level of service on other International travel where a passenger is most often appreciated.

Awful. Worst airline I have ever been on. Crew were among the rudest people I have ever dealt with. United staff members were rude and disrespectful. My flight was delayed, causing me to miss a connecting flight. I understand things happen, but when staff start lying about what actually happened, that is when I have an issue. Just be honest, really it isn’t that hard. I’m being very honest with this review and I don’t find this difficult what so ever. In fact, because of United Airlines, my Christmas holiday was off to a really rocky start. As someone who has traveled across the world, it has only been United that I have had a truly awful experience.

Good flight. On time. Boarding and seating was easy. Crew were really friendly, yet professional. Bathroom (by cockpit) was small but serviceable. Some the seats were showing some notable wear & tear, but were comfy. Very happy UA customer. TY! 🤛🏽💗

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.

Seats were old and dirty, for a long haul flight you expect to be able to recline and for the av to work properly. Choice for vegans was fruit….

The Virgin Atlantic crew was very good. However, the equipment was OK, the seats were OK, but her bags did not arrive with me. Two bags showed up a day later and I’m still waiting for my third back.

Boarding is a mess. They never check group # so lots of people crowding in. Comfortable seats this flight. I had an empty seat next to me, very convenient. Food was really not good, but I was starved. The pizza snack thing was horrible. Crew was grand. They really make it enjoyable.

Crew very helpful and friendly. Food is so so. Main meal is not always the best. Did have a choice of a snack part way which was either a cookie, corn snack, or similar. Second kind of meal was basically like a pizza pastry that really wasn’t a favorite but probably a European snack? Screens and selections of movies, tv and such were good. No WI-Fi unless you buy so no free texting or such on the long flight but I think that might be any overseas flight.

Flight Attendant Karen Lynn was an absolute delight. She assisted in every portion of the services provided throughout the flight, aided with any and all concerns expressed by passengers, and even helped comfort an upset child who was one of five of a traveling family. This quality of service is what keeps me coming back to American. Thank you!

The worst, flight cancelled because the aircraft was not full. Heathrow ground crew totally not helpful and arrogant. Lady proposed us flight with 40min layover instead of direct and said it is our problem of course she was unable to do anything as everything was beyond her control she claimed. after calling on hotline another flight was booked. Flight was cancelled last second so we could not take direct from Zurich but we had to stay overnight in London.

Food was terrible , crew were excellent , IFE was dire . Overall comfortable seat and cabin. Nothing special .

If my tv wasn’t broken and I wasn’t in a seat that didn’t allow for sleeping

Delayed flight due to lack of crew caused me to miss my connection

Please make sure the number of seats matches the number of overhead bins and passengers don't carry on more than one bag.

Seating is tight if you don’t upgrade. Food was decent. Boarding and unboarding was efficient. Smooth flight. Could make upgrades more affordable

American Airlines seemed to run a 'dry' flight. No alcohol was offered at any point with meals. Breakfast was a bit tasteless. The 'hot pocket' whatever that is, was horrid breadish pastry with very little filling. Decaf coffee was horrid. Seats didn't seem as wide or spacious as usual, especually for a ten hour flight.

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

Information on your arrival and departure airports

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