SFO - LHR

Find cheap flights from San Francisco to London

1 adult

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
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 27% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheap Flight Deals from San Francisco to London (SFO-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip 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.

Recent round-trip flight deals from San Francisco to London

KAYAK's recommended round-trip deals from the most popular airlines that fly from San Francisco to London.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
American Airlines Logo
SFO-LHR
10h 35mdirect
American Airlines Logo
LHR-SFO
11h 05mdirect
American Airlines
Find Deal
KLM Logo
SFO-LHR
10h 20mdirect
KLM Logo
LHR-SFO
11h 00mdirect
Air Canada Logo
SFO-LHR
10h 30mdirect
Air Canada Logo
LHR-SFO
11h 00mdirect
Air Canada
Find Deal
Aer Lingus Logo
SFO-LHR
10h 35mdirect
Aer Lingus Logo
LHR-SFO
11h 05mdirect
Aer Lingus
Find Deal
Austrian Airlines Logo
SFO-LHR
10h 30mdirect
Austrian Airlines Logo
LHR-SFO
11h 00mdirect
Austrian Airlines
Find Deal
Air France Logo
SFO-LHR
10h 20mdirect
Air France Logo
LHR-SFO
11h 00mdirect
Air France
Find Deal
Delta Logo
SFO-LHR
10h 20mdirect
Delta Logo
LHR-SFO
11h 00mdirect
Aeromexico Logo
SFO-LHR
10h 20mdirect
Aeromexico Logo
LHR-SFO
11h 05mdirect
Aeromexico
Find Deal
SWISS Logo
SFO-LHR
10h 30mdirect
SWISS Logo
LHR-SFO
11h 05mdirect
Air New Zealand Logo
SFO-LHR
10h 30mdirect
Air New Zealand Logo
LHR-SFO
11h 05mdirect
Air New Zealand
Find Deal
United Airlines Logo
SFO-LHR
10h 30mdirect
United Airlines Logo
LHR-SFO
11h 05mdirect
United Airlines
Find Deal
Alaska Airlines Logo
SFO-LHR
10h 35mdirect
Alaska Airlines Logo
LHR-SFO
11h 05mdirect
Alaska Airlines
Find Deal
Finnair Logo
SFO-LHR
10h 35mdirect
Finnair Logo
LHR-SFO
11h 05mdirect
Finnair
Find Deal
Iberia Logo
SFO-LHR
10h 25mdirect
Iberia Logo
LHR-SFO
11h 10mdirect
Iberia
Find Deal
Brussels Airlines Logo
SFO-LHR
10h 30mdirect
Brussels Airlines Logo
LHR-SFO
11h 05mdirect
Brussels Airlines
Find Deal
Lufthansa Logo
SFO-LHR
10h 30mdirect
Lufthansa Logo
LHR-SFO
11h 05mdirect
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 35mdirect
British Airways Logo
LHR-SFO
11h 05mdirect
British Airways
Find Deal

Expert advice for your flight from San Francisco to London

 
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
United Airlines

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


United Polaris Lounge provides a luxurious experience with seated meals and less crowding.

British Airways

Consider upgrading to premium economy for 18 cm more legroom on long-haul flights.


BA's cabin crew are professional and proactive, enhancing the flight experience.

Airports
SFO

SFO offers curbside check-in for a fee, making it a convenient option for families or those with heavy luggage.

Read more about SFOby Blane Bachelor
LHR

The Elizabeth Line offers a cost-effective way to reach central London from Heathrow, taking about twice as long as the Express.

Read more about LHRby Duncan Madden
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on 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 British Airways and 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 San Francisco to London flights

Get data-powered insights and trends into flights from San Francisco to London 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 Wednesdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from London, Tuesday is the cheapest day to fly and Thursday 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 C$ 889 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is C$ 1,541 and C$ 1,339 respectively.

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

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.
No, with an average price for the route of C$ 728, prices are generally cheapest when you fly direct.

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 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Good to know

Low season

January

High season

July
Best time to beat the crowds (13% less expensive on average)
Most popular time to fly (23% more expensive on average)

When to book flights from San Francisco to London

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

Insights shared by verified travellers who flew the route from San Francisco to London 
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.
Verified travelerFlew with American AirlinesSFO-LHRApr 2024
best airlines for business class: KLM and Turkish

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, SWISS, Iberia, United Airlines, and American Airlines 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 round-trip 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.

See more FAQs

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 C$ 636 or less one-way and C$ 1,250 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.
See more tips

Prefer to fly direct from San Francisco to London?

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 nonstop 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 nonstop flights
See more nonstop flights

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.