LHR - SFO

C$ 573 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 London to San Francisco departing on 7/5. 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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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 round-trip 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 round-trip flight deals from London to San Francisco

KAYAK's recommended round-trip deals from the most popular airlines that fly from London to San Francisco.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
United Airlines Logo
12:05 p.m. - 7:25 a.m.LHR-SFO
27h 20m2 stops
United Airlines Logo
11:57 p.m. - 6:55 a.m.SFO-LHR
22h 58m1 stop
C$ 620United Airlines
Find Deal
Thu, 11 Sep - Thu, 25 Sep
United Airlines Logo
11:25 a.m. - 11:00 p.m.LHR-SFO
19h 35m2 stops
United Airlines Logo
11:57 p.m. - 6:55 a.m.SFO-LHR
22h 58m1 stop
C$ 626United Airlines
Find Deal
Wed, 3 Sep - Wed, 10 Sep
United Airlines Logo
12:05 p.m. - 7:29 a.m.LHR-SFO
27h 24m2 stops
United Airlines Logo
12:55 p.m. - 7:25 a.m.SFO-LHR
10h 30mdirect
C$ 637United Airlines
Find Deal
Fri, 9 May - Mon, 19 May
 Logo
8:40 a.m. - 4:10 p.m.LHR-SFO
15h 30m1 stop
 Logo
3:55 p.m. - 10:25 a.m.SFO-LHR
10h 30mdirect
C$ 756
Find Deal
Fri, 2 May - Sat, 10 May
SWISS Logo
6:00 a.m. - 4:10 p.m.LHR-SFO
18h 10m1 stop
SWISS Logo
7:30 p.m. - 7:20 p.m.SFO-LHR
15h 50m1 stop
C$ 758SWISS
Find Deal
Mon, 5 May - Mon, 19 May
Lufthansa Logo
7:25 a.m. - 2:35 p.m.LHR-SFO
15h 10m1 stop
Lufthansa Logo
7:50 p.m. - 2:10 p.m.SFO-LHR
10h 20mdirect
C$ 760Lufthansa
Find Deal
Sun, 11 May - Fri, 23 May
Lufthansa Logo
6:30 a.m. - 12:40 p.m.LHR-SFO
14h 10m1 stop
Lufthansa Logo
8:30 a.m. - 6:20 a.m.SFO-LHR
13h 50m1 stop
C$ 761Lufthansa
Find Deal
Thu, 8 May - Mon, 12 May
TAP AIR PORTUGAL Logo
6:00 a.m. - 2:30 p.m.LHR-SFO
16h 30m1 stop
TAP AIR PORTUGAL Logo
6:45 p.m. - 12:45 p.m.SFO-LHR
34h 00m2 stops
C$ 794TAP AIR PORTUGAL
Find Deal
Mon, 8 Sep - Tue, 16 Sep
TAP AIR PORTUGAL Logo
6:45 p.m. - 4:45 p.m.LHR-SFO
30h 00m2 stops
TAP AIR PORTUGAL Logo
6:45 p.m. - 10:00 p.m.SFO-LHR
19h 15m2 stops
C$ 809TAP AIR PORTUGAL
Find Deal
Mon, 8 Sep - Tue, 16 Sep
SWISS Logo
7:00 a.m. - 4:25 p.m.LHR-SFO
17h 25m2 stops
SWISS Logo
10:52 a.m. - 1:00 p.m.SFO-LHR
18h 08m2 stops
C$ 811SWISS
Find Deal
Mon, 5 May - Mon, 12 May

Expert advice for your flight from London to San Francisco

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are specific to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Air Canada

Air Canada's Signature Class offers lie-flat seats with direct aisle access on long-haul flights.


Air Canada offers Wi-Fi on some flights; check availability five days before departure.

Read more about Air Canadaby Stefanie Waldek
United Airlines

United Polaris offers lie-flat seats with aisle access, ideal for long-haul comfort.


United offers free meals in economy on long-haul international flights.

Airports
LHR

Heathrow's security lines can be long. Arrive two hours early with carry-on, more if checking bags, especially during peak times.

Read more about LHRby Duncan Madden
SFO

For a smooth arrival at SFO, use BART for quick city access. It's affordable and avoids rush hour traffic.

Read more about SFOby Blane Bachelor
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada and United Airlines

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Duncan Madden

Duncan Madden

Expert on LHR

Duncan Madden

Duncan Madden

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Read more
Blane Bachelor

Blane Bachelor

Expert on SFO

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more

KAYAK's insights & trends for London to San Francisco flights

Get data-powered insights and trends into flights from London 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 your flying dates are flexible, you should consider flying to San Francisco on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Thursday is the most expensive day to fly from London to San Francisco. For your return ticket, we recommend flying on a Wednesday and avoiding Saturdays for the best deals.

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 C$ 782 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is C$ 1,301 and C$ 1,287 respectively.

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 season

January

High season

July

Cheapest flight

C$ 573
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 London to San Francisco

Are your dates flexible? Find out the best times to travel from London to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 London to San Francisco: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from London 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 C$ 415 for a one-way ticket and C$ 449 for a round-trip.

  • 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.

  • 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 round-trip 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.

See more FAQs

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 C$ 1,142 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.
See more tips

Prefer to fly direct from London 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 nonstop 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 nonstop flights
See more nonstop flights

Top airline flying from London 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 London 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 8684 reviews
7.3Comfort
6.6Food
8.1Crew
7.7Boarding
7.1Entertainment
Airline reviews

The gate was too far away for the connecting flight

8.0 ExcellentAnonymous, Mar 2025LAX - SFO
Read more United Airlines reviews

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! 🤛🏽💗

We were delayed 3x and because I didn’t purchase my tickets directly from United Airlines I was told I Have to take care of it myself so I called Underpricer and they helped me but before I changed my flights I took the risk of sticking by what my tickets were and was lucky to have gotten on the original all flight with only 15 mins before take off. not sure if I will do this again

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

Information on your arrival and departure airports

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