LHR - SFO

C$ 757 Find Cheap Flights from London to San Francisco – Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
C$ 799
Typical prices: C$ 884-C$ 1,276
Alaska Airlines
Fri 9/11Sat 17/11
LHR - SFO • 1 stop
Cheapest direct flights
C$ 920
Typical prices: C$ 895-C$ 1,309
Delta
Sun 14/1Mon 21/5
LHR - SFO • Direct
Advice from real travellers
United economy meals are included on this long-haul route; Air Canada may offer Wi-Fi.
At Heathrow, allow extra time for security and double-check the flight number.
Expert advice
+1
Expert advice
+1
Direct flights
You can fly direct with United Airlines, British Airways, and Virgin Atlantic. Average duration is 11h 12m
Direct flights
+1
Direct flights
+1
Avoid delays
Most punctual • 89% on-time
Best time • Fewest delays
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 19 weeks in advance save around 20% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 25% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg C$ 886 (round-trip)
Shortest trip • 14h 06m (one-way)
Insights
Insights
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you enjoy your trip to San Francisco!
Flight Deals
Booking Insights
Expert advice
Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from London to San Francisco

Mon, 9 Nov - Tue, 17 Nov
Alaska Airlines Logo
2:45 p.m. - 9:43 p.m.LHR  London Heathrow-SFO San Francisco
14h 58m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
12:13 p.m. - 12:20 p.m.SFO  San Francisco-LHR London Heathrow
16h 07m1 stop Seattle/Tacoma Intl
C$ 799Alaska Airlines
Mon, 23 Nov - Wed, 9 Dec
Alaska Airlines Logo
2:45 p.m. - 9:43 p.m.LHR  London Heathrow-SFO San Francisco
14h 58m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:00 a.m. - 12:20 p.m.SFO  San Francisco-LHR London Heathrow
21h 20m1 stop Seattle/Tacoma Intl
C$ 799Alaska Airlines
Mon, 9 Nov - Mon, 23 Nov
Alaska Airlines Logo
2:45 p.m. - 8:47 p.m.LHR  London Heathrow-SFO San Francisco
14h 02m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:00 a.m. - 12:20 p.m.SFO  San Francisco-LHR London Heathrow
22h 20m1 stop Seattle/Tacoma Intl
C$ 799Alaska Airlines
Thu, 12 Nov - Tue, 1 Dec
Alaska Airlines Logo
2:45 p.m. - 9:43 p.m.LHR  London Heathrow-SFO San Francisco
14h 58m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
9:40 a.m. - 12:20 p.m.SFO  San Francisco-LHR London Heathrow
18h 40m1 stop Seattle/Tacoma Intl
C$ 800Alaska Airlines
Sat, 14 Nov - Tue, 1 Dec
Alaska Airlines Logo
2:45 p.m. - 9:47 p.m.LHR  London Heathrow-SFO San Francisco
15h 02m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:00 a.m. - 12:20 p.m.SFO  San Francisco-LHR London Heathrow
21h 20m1 stop Seattle/Tacoma Intl
C$ 800Alaska Airlines
Fri, 13 Nov - Sat, 5 Dec
Alaska Airlines Logo
2:45 p.m. - 9:43 p.m.LHR  London Heathrow-SFO San Francisco
14h 58m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
10:45 a.m. - 12:20 p.m.SFO  San Francisco-LHR London Heathrow
17h 35m1 stop Seattle/Tacoma Intl
C$ 800Alaska Airlines
Fri, 13 Nov - Tue, 1 Dec
Alaska Airlines Logo
2:45 p.m. - 10:45 p.m.LHR  London Heathrow-SFO San Francisco
16h 00m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
12:39 p.m. - 12:20 p.m.SFO  San Francisco-LHR London Heathrow
15h 41m1 stop Seattle/Tacoma Intl
C$ 800Alaska Airlines
Tue, 10 Nov - Thu, 3 Dec
Alaska Airlines Logo
2:45 p.m. - 8:47 p.m.LHR  London Heathrow-SFO San Francisco
14h 02m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
12:39 p.m. - 12:20 p.m.SFO  San Francisco-LHR London Heathrow
15h 41m1 stop Seattle/Tacoma Intl
C$ 800Alaska Airlines
Mon, 9 Nov - Sat, 5 Dec
Alaska Airlines Logo
2:45 p.m. - 10:45 p.m.LHR  London Heathrow-SFO San Francisco
16h 00m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
9:45 a.m. - 12:20 p.m.SFO  San Francisco-LHR London Heathrow
18h 35m1 stop Seattle/Tacoma Intl
C$ 800Alaska Airlines
Sat, 14 Nov - Wed, 18 Nov
Lufthansa Logo
10:05 a.m. - 1:20 p.m.LHR  London Heathrow-SFO San Francisco
11h 15mdirect
Lufthansa Logo
12:50 p.m. - 7:25 a.m.SFO  San Francisco-LHR London Heathrow
10h 35mdirect
C$ 1,227Lufthansa
Booking Insights

Price, demand, and travel trends for London Heathrow Airport to San Francisco flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from London Heathrow Airport to San Francisco?

Round-trip flights from London Heathrow Airport to San Francisco typically range from C$ 884 to C$ 1,276. The lowest price found in the past 5 days was C$ 799, on Alaska Airlines.

What's the cheapest day of the week to fly from London Heathrow Airport to San Francisco?

Based on deals KAYAK users found in the last 12 months, Thursday is the cheapest day of the week to fly from London Heathrow Airport to San Francisco. It's 6% cheaper than the average day, while Sunday is the most expensive, with prices 5% higher.

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

•February is the cheapest month to fly from London Heathrow Airport to San Francisco at C$ 794 round-trip.
•December (C$ 1,214) and July (C$ 1,145) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 52% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from London Heathrow Airport to San Francisco the cheapest?

Flights from London Heathrow Airport to San Francisco are cheapest 19 weeks before departure. Booking in this window typically costs about 20% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from London to San Francisco

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada and United Airlines

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.

Duncan Madden

Duncan Madden

Expert on LHR

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.

Blane Bachelor

Blane Bachelor

Expert on SFO

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.

Key details for London Heathrow Airport to San Francisco flights

Low season

February

Cheapest flight

C$ 757
Beat the crowds with an average 33% drop in traveller numbers.
The most popular month to fly with an average 52% increase in traveller numbers.
One-way flight from London Heathrow Airport 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

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 
ManyiFlew with British Airways-Jun 2026
London airport is huge - it took be an hour to transfer from one gate to another gate in the same terminal. Plan accordingly.
AntonFlew with United Airlines-Feb 2026
United has a cool arrival lounge in london but it is a bit hard to find, after customs look left
AlastairFlew with British Airways-Feb 2025
Make sure your free checked luggage is for outward and return flights.
Verified travelerFlew with United Airlines-Sep 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 Airlines-Mar 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 Iberia-Mar 2024
In London triple check your flight they have multiple leaving for the same destination once - it is easy to get them confused

Your London Heathrow Airport to San Francisco flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • What are the earliest and latest flights from London Heathrow Airport to San Francisco?

    These are the earliest and latest flight times available from London Heathrow Airport to San Francisco:

    • Earliest: departs at 10:05 am and lands at 9:17 pm
    • Latest: departs at 3:20 pm and lands at 2:32 am.

    The flight takes about 11h 12m.

  • Which cabin classes can I book on flights from London Heathrow Airport to San Francisco?

    Two cabin classes are available on flights from London Heathrow Airport to San Francisco:

    • Economy Class
    • Premium Economy Class

  • How long does a flight from London Heathrow Airport to San Francisco take?

    A direct flight from London Heathrow Airport to San Francisco takes 11h 12m, covering 13,857 km.

  • Do I need a passport to fly from London Heathrow Airport to San Francisco?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a London Heathrow Airport to San Francisco flight?

    Round-trip flights from London Heathrow Airport to San Francisco range from C$ 884 to C$ 1,276, with an average of C$ 1,058 over the past 12 months. Anything below C$ 884 counts as a good deal.

  • How expensive are last-minute London Heathrow Airport to San Francisco flights?

    Last-minute fares on this route (booked within two weeks of departure) run 14% above the C$ 1,058 route average. Book 19 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from London Heathrow Airport to San Francisco?

    On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 886 round-trip via Minneapolis St Paul (MSP), compared to C$ 1,068 for direct.

  • How does on-time performance compare across airlines flying from London Heathrow Airport to San Francisco?

    United Airlines is slightly above the route average for timely arrivals, while Virgin Atlantic has a lower on-time arrival rate. On-time arrival rates on London Heathrow Airport to San Francisco flights are:

    • United Airlines: 89% on time
    • Virgin Atlantic: 87% on time
    • British Airways: 85% on time

    On average, flights on this route are punctual 87% of the time.

  • What is the standard checked bag allowance on flights from London Heathrow Airport to San Francisco?

    There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 72–C$ 140 for the first checked bag in economy. Premium fares and elite status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from London Heathrow Airport to San Francisco?

    The Boeing 787-9 Dreamliner family is used most often on this route, operated mainly by Lufthansa and Brussels Airlines. Other aircraft seen on the route include Airbus A380-800 variants.

  • How are flight departures from London Heathrow Airport to San Francisco spread across the day?

    Morning is the busiest departure period on London Heathrow Airport to San Francisco flights, with 60% leaving in that window. Afternoon departures account for 40%, Evening flights for 0%, and Night flights for 0%.

  • Which airlines offer Wi-Fi on London Heathrow Airport to San Francisco flights?

    KLM is the only airline on the London Heathrow Airport to San Francisco route offering in-flight Wi-Fi. Pricing depends on fare class.

  • How are flight prices from London Heathrow Airport to San Francisco looking right now?

    One-way fares from London Heathrow Airport to San Francisco are currently higher than usual. Average one-way flight prices are about C$ 1,051, which is 11% above the typical average for this route.

  • What car rental options are available at San Francisco Airport (SFO)?

    San Francisco Airport (SFO) hosts 5 major car rental companies, with daily rates averaging C$ 88 for economy cars. Top options include:

    • Europcar
    • Thrifty
    • Dollar
    • Hertz
    • Fox

  • Which airports can I use when flying from London Heathrow Airport to San Francisco?

    Flights from London Heathrow Airport to San Francisco usually depart from London Heathrow (LHR) and arrive at San Francisco (SFO).

  • What time of day has the fewest delays on flights from London Heathrow Airport to San Francisco?

    Morning flights have the fewest delays on this route, while evening departures tend to have the most.

  • At what point is a flight considered delayed on the route from London Heathrow Airport to San Francisco?

    A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the London Heathrow Airport to San Francisco route, 13% of flights were delayed in the past three months, with delays averaging 2h 21m.

  • Which airports do connecting flights from London Heathrow Airport to San Francisco pass through?

    One-stop flights from London Heathrow Airport to San Francisco most commonly connect through:

    • Dublin (DUB) – 31% of one-stop connections
    • Seattle/Tacoma Intl (SEA) – 18% of one-stop connections
    • Lisbon Humberto Delgado (LIS) – 13% of one-stop connections
    • Kastrup Copenhagen (CPH) – 12% of one-stop connections

  • Can I save money by using flexible dates for flights from London Heathrow Airport to San Francisco?

    Yes. Flexible dates can save you up to 10% on flights from London Heathrow Airport to San Francisco. Thursday is the cheapest departure day at C$ 1,004 round-trip on average, while Sunday is the most expensive at C$ 1,113, a difference of C$ 109.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • Which airlines fly from London Heathrow Airport to San Francisco?

    3 airlines operate flights between London Heathrow Airport and San Francisco. The airlines offering direct flights on this route include:

    • United Airlines
    • British Airways
    • Virgin Atlantic

  • How much time can I save by choosing a different layover airport when travelling from London Heathrow Airport to San Francisco?

    Flying via Frankfurt am Main (FRA) gives the shortest average 1-stop total travel time at 14h 06m, compared with 14h 12m via Dublin (DUB) and 14h 22m via Amsterdam Schiphol (AMS).

  • What is the time difference between London Heathrow Airport and San Francisco?

    San Francisco is 7 hours behind London Heathrow Airport (Pacific Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

  • Which popular places can I visit in San Francisco?

    Some of the most popular sights in San Francisco are Fisherman's Wharf, Moscone Center, and Union Square. These are among the most viewed places in San Francisco on KAYAK.

  • Which airlines offer extra legroom and free seat selection on London Heathrow Airport to San Francisco flights?

    Among airlines operating London Heathrow Airport to San Francisco flights:

    • Lufthansa: offers extra legroom
    • Virgin Atlantic: offers extra legroom; offers free seat selection
    • United Airlines: offers extra legroom; offers free seat selection
    • Brussels Airlines: offers free seat selection
    • KLM: offers extra legroom; offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on London Heathrow Airport to San Francisco flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Lufthansa: a carry-on bag and a checked bag in Economy Class
    • British Airways: a carry-on bag and a checked bag in Economy Class
    • Virgin Atlantic: a carry-on bag and a checked bag in Economy Class

    Baggage allowance can vary by ticket type, cabin class, route, and airline, so always check the fare details before booking.

  • 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.

Your guide to booking London Heathrow Airport to San Francisco flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Thursday departure and avoid flying on Sunday. On this route, Thursday flights average C$ 1,004, about C$ 109 less than Sunday fares (10% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 19 weeks before you fly. On this route, that window historically saves about 20% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your London Heathrow Airport to San Francisco trip for February. Fares historically average C$ 794 round-trip in that month – typically C$ 420 less than the most expensive month, which is December (based on the last 12 months).
  • For the best chance of arriving on time, fly with United Airlines. Over the past three months, 89% of United Airlines flights from London Heathrow Airport to San Francisco arrived on time, slightly above the route average of 87%. When flights on this route arrive late, they're delayed by an average of 2h 21m, so choosing an airline with strong on-time performance can make a difference if you're on a tight schedule.
  • If you have the time, taking a 1-stop flight through Minneapolis St Paul Airport (MSP) can be cheaper than flying direct. The cheapest layover option averages C$ 886 round-trip on this route – about C$ 182 less than direct flights (based on the last 12 months).
  • 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 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

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Tuesday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Wednesday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Thursday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Friday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Saturday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Sunday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

See more nonstop flights

Direct returns

San Francisco to London Heathrow

Monday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Tuesday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Wednesday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Thursday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Friday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Saturday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

Sunday

British Airways,United Airlines,Virgin Atlantic

British Airways,United Airlines, +1 more

See more nonstop flights

More options for your flight from London to San Francisco

Complete your trip to San Francisco with a hotel stay or car rental