SFO - LHR

Find cheap flight tickets from San Francisco to London

1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

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

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from San Francisco to London 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 San Francisco to Heathrow

American Airlines Logo
SFO-LHR
10h 25mdirect
American Airlines Logo
LHR-SFO
11h 05mdirect
American Airlines
Find Deal
KLM Logo
SFO-LHR
10h 10mdirect
KLM Logo
LHR-SFO
11h 00mdirect
Air Canada Logo
SFO-LHR
10h 35mdirect
Air Canada Logo
LHR-SFO
11h 15mdirect
Air Canada
Find Deal
Aer Lingus Logo
SFO-LHR
10h 25mdirect
Aer Lingus Logo
LHR-SFO
11h 05mdirect
Aer Lingus
Find Deal
Austrian Airlines Logo
SFO-LHR
10h 35mdirect
Austrian Airlines Logo
LHR-SFO
11h 15mdirect
Austrian Airlines
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Air France Logo
SFO-LHR
10h 20mdirect
Air France Logo
LHR-SFO
11h 00mdirect
Air France
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Delta Logo
SFO-LHR
10h 10mdirect
Delta Logo
LHR-SFO
11h 00mdirect
Aeromexico Logo
SFO-LHR
10h 20mdirect
Aeromexico Logo
LHR-SFO
11h 00mdirect
Aeromexico
Find Deal
SWISS Logo
SFO-LHR
10h 35mdirect
SWISS Logo
LHR-SFO
11h 15mdirect
Air New Zealand Logo
SFO-LHR
10h 35mdirect
Air New Zealand Logo
LHR-SFO
11h 15mdirect
Air New Zealand
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United Airlines Logo
SFO-LHR
10h 35mdirect
United Airlines Logo
LHR-SFO
11h 15mdirect
United Airlines
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Alaska Airlines Logo
SFO-LHR
10h 25mdirect
Alaska Airlines Logo
LHR-SFO
11h 05mdirect
Alaska Airlines
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Finnair Logo
SFO-LHR
10h 25mdirect
Finnair Logo
LHR-SFO
11h 05mdirect
Finnair
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Iberia Logo
SFO-LHR
10h 30mdirect
Iberia Logo
LHR-SFO
11h 15mdirect
Iberia
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Brussels Airlines Logo
SFO-LHR
10h 35mdirect
Brussels Airlines Logo
LHR-SFO
11h 15mdirect
Brussels Airlines
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Lufthansa Logo
SFO-LHR
10h 35mdirect
Lufthansa Logo
LHR-SFO
11h 15mdirect
Lufthansa
Find Deal
Virgin Atlantic Logo
SFO-LHR
10h 20mdirect
Virgin Atlantic Logo
LHR-SFO
11h 00mdirect
Virgin Atlantic
Find Deal
British Airways Logo
SFO-LHR
10h 25mdirect
British Airways Logo
LHR-SFO
11h 05mdirect
British Airways
Find Deal
Useful Info

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

Get data-powered insights and trends into flights from San Francisco to Heathrow 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 San Francisco to London?

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to London Heathrow Airport, 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 San Francisco to London Heathrow Airport is October, where tickets cost ₹ 54,498 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is ₹ 92,655 and ₹ 83,158 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Francisco to London Heathrow Airport, 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 San Francisco to London Heathrow Airport, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.


Good to know

Low seasonJanuary
High seasonJuly
Best time to beat the crowds (12% less expensive on average)
Most popular time to fly (23% more expensive on average)

When to book flights from San Francisco to Heathrow

Are your dates flexible? Find out the best times to travel from San Francisco to Heathrow 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 San Francisco to Heathrow: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from San Francisco to Heathrow 
GeraldFlew with Virgin AtlanticSFO-LHRJun 2025
Virgin Atlantic uses terminal 3. Much faster clearing customs than terminal 5
PallaviFlew with British AirwaysSFO-LHRApr 2025
Eat at the lounge first so you are not stuck eating overcooked cheese ravioli
TapanFlew with British AirwaysSFO-LHROct 2024
Great baggage policy in BA.. The worst part was experience at London Heathrow airport. Security was slow, too many people. Almost lost connecting flight even with 2 hours layover.

FAQs for booking San Francisco to London flights

  • Are there nonstop flights from San Francisco to Heathrow Airport?

    It is possible to fly directly into London from San Francisco. American Airlines and British Airways offer direct London flight deals, making the two airlines highly sought after by business travelers. However, you’ll have to add a few dollars for a ticket. Other airlines, such as Lufthansa, Aer Lingus, KLM, and Finnair have one-stop flights with one or multiple layovers in Frankfurt, Munich, Dublin, Amsterdam, and Helsinki.

  • Where can I find car rental companies at Heathrow Airport?

    If you prefer driving to your hotel or the city center from Heathrow Airport, you can rent a car from the car rental agencies located at every terminal's arrival concourses. You can rent a vehicle from some renowned companies, such as National, Avis, Europcar, Alamo, Enterprise Rent-A-Car, and Budget.

  • How can I get to London City from Heathrow Airport?

    You can access London city from Heathrow Airport by bus. The National Express buses depart the Heathrow Central Station, nestled between Terminals 2 and 3, every 15min. The journey takes about 50min. You can also take the Heathrow Express Trains that connect to Paddington Station in London. Fares cost around £15.87 ($22) - £18.04 ($25). Otherwise, take the typical black taxis, Minicabit, or cabs, which might charge about £2.89 ($4) - £5.05 ($7). You can also book a Heathrow Shuttle Transfer to your hotel or city center, although these have several stops.

  • Where are the airport lounges at San Francisco Airport?

    There are about seven lounges at San Francisco Airport (SFO) where you can relax and enjoy VIP services before your Heathrow (LHR) flight. They include the Air France-KLM Lounge (International Terminal A), American Airlines Admirals Club (Terminal 1), The Centurion Lounge (Terminal 3), Delta Sky Club (Terminal 2), Japan Airlines Sakura Lounge (Terminal A, immediately next to Gate A1), and others.

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

    KLM, Iberia, SWISS, United Airlines, and Lufthansa offer inflight Wi-Fi service on the San Francisco to London flight route.

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

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

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

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

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

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

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

    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 San Francisco to London.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from San Francisco 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 San Francisco to London?

    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 London with an airline and back to San Francisco with another airline.

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

    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 London from San Francisco 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 San Francisco to London Heathrow Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for ₹ 31,235 or less one-way and ₹ 65,249 or less round-trip.
  • Are you traveling for business? San Francisco Airport (SFO) offers business-centric services to make your trip as productive and convenient as possible. There is a Business Center in the International Terminal Main Building with free Wi-Fi, charging outlets, fax and copying solutions.
  • Flight boarding and cargo handling can be more convenient if you're at the right terminal. If you booked a Virgin Atlantic or British Airways ticket from San Francisco Airport (SFO), it would be best to check-in at the International Terminal. However, American Airlines depart from Terminal 2.
  • Do you have a lot of baggage and require inter-terminal transport at London-Heathrow Airport (LHR)? There are bus shuttles that transfer passengers from the arrival terminals to the Main Arrival Hall. You can also take the underground train, but you'll have to purchase a ticket at the terminal station.
  • Families will relish flying from San Francisco Airport (SFO) because it has many family-friendly amenities. The airport provides baggage assistance, nursing rooms, and children's play areas in Terminals 1, 2, and 3.
  • Travelers driving to the airport can find plenty of parking spaces within the San Francisco hub. You can park at the International Garage A or G. These charge about $2 per 15min, with a daily maximum of around $36. There's also a long-term parking lot with a daily maximum of about $18.

Prefer to fly direct from San Francisco to London Heathrow?

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

Direct departures

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

Direct returns

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
See more direct flights

Top airline flying from San Francisco to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to London. 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 San Francisco to Heathrow? 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
7.0Entertainment
6.6Food
7.7Boarding
7.3Comfort
8.1Crew
Airline reviews

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

10.0 ExcellentElena, Jun 2025SFO - EWR
Read more United Airlines reviews

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Breakfast was not loaded at SFO due to catering company change. Seems like a major airline at a major hub would have thought of something else or warned passengers to pick up food before boarding a 3 hour flight.

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

They hired a new catering company the same day of my flight. They botched the job by not delivering the right carts and after THREE HOURS waiting, the flight crew timed out (flight was 19 hours long and FAA rules state crew can’t work more than 14 hours long). So they CANCELED OUR FLIGHT!! Worst experience ever. Avoid UAL at all costs.

The personnel were professional and friendly. The Boeing 737 Max 9 is too claustrophobic and was very warm at both airport gates, and still warm in the air.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

get E+, a must for 5 hours flight if you are tall

Liked fold flat bed. Didn’t like having no window. Didn’t like poor choice of food and being served dinner very late, hours after take off of a 7:40pm flight. Servers not friendly. Food horrible in business class.

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

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

Information on your arrival and departure airports

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