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Cheap flights from London Heathrow Airport to San Francisco from C$ 761

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
26 Aug — 2 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to San Francisco are usually found in February or September, booked 23 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Heathrow to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to San Francisco
Explore the most affordable flight options available from Heathrow to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 July 2026.

Sat 22/86:55 a.m.
LHR
-
SFO
1 stop15h 25m
United Airlines
Sat 22/87:49 p.m.
SFO
-
LHR
1 stop30h 21m
United Airlines
Deal found 25/7C$ 860
Mon 28/1211:35 a.m.
LHR
-
SFO
1 stop27h 30m
United Airlines
Thu 31/1212:29 p.m.
SFO
-
LHR
1 stop15h 31m
United Airlines
Deal found 25/7C$ 861
Tue 17/111:45 p.m.
LHR
-
SFO
Nonstop11h 10m
United Airlines
Fri 20/118:40 a.m.
SFO
-
LHR
1 stop15h 50m
United Airlines
Deal found 27/7C$ 865
Thu 24/129:30 a.m.
LHR
-
SFO
1 stop18h 40m
United Airlines
Tue 5/19:15 p.m.
SFO
-
LHR
1 stop15h 20m
United Airlines
Deal found 23/7C$ 867
Sat 26/123:20 p.m.
LHR
-
SFO
1 stop15h 43m
United Airlines
Fri 1/110:10 a.m.
SFO
-
LHR
1 stop19h 20m
United Airlines
Deal found 24/7C$ 868
Wed 23/96:30 a.m.
LHR
-
SFO
1 stop14h 10m
Lufthansa
Tue 13/102:40 p.m.
SFO
-
LHR
1 stop14h 00m
Lufthansa
Deal found 25/7C$ 869
Tue 27/101:30 p.m.
LHR
-
SFO
1 stop14h 40m
Lufthansa
Sun 8/116:45 p.m.
SFO
-
LHR
1 stop14h 05m
Lufthansa
Deal found 24/7C$ 872
Wed 18/116:30 a.m.
LHR
-
SFO
1 stop13h 15m
Delta
Mon 23/1110:38 a.m.
SFO
-
LHR
2 stops16h 07m
Delta
Deal found 26/7C$ 875
Thu 5/113:20 p.m.
LHR
-
SFO
Nonstop11h 25m
British Airways
Thu 19/115:25 p.m.
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 27/7C$ 876
Mon 7/1211:50 a.m.
LHR
-
SFO
Nonstop11h 00m
Delta
Mon 14/121:05 p.m.
SFO
-
LHR
1 stop13h 25m
Delta
Deal found 23/7C$ 878
Wed 4/1111:50 a.m.
LHR
-
SFO
Nonstop11h 00m
KLM
Wed 18/114:40 p.m.
SFO
-
LHR
Nonstop10h 15m
KLM
Deal found 23/7C$ 881
Sun 20/1211:35 a.m.
LHR
-
SFO
1 stop29h 54m
United Airlines
Sat 2/17:01 p.m.
SFO
-
LHR
1 stop30h 39m
United Airlines
Deal found 27/7C$ 882

Find flight deals from Heathrow to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 27 July 2026.

Round-trip from

C$ 860

One-way from

C$ 761

Popular in

December

Cheapest in

February

Average price

C$ 1,164

Good round-trip deal

C$ 3,941 or less

Good one-way deal

C$ 3,104 or less
United Airlines
  • United Airlines
  • 22/8-22/8
  • 2 total stops
  • 45h 46m total
  • London to San Francisco
Search Deals
Austrian Airlines
  • Austrian Airlines
  • 17/9
  • Nonstop
  • 11h 00m total
  • London to San Francisco
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (C$ 5 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to San Francisco.
Search Deals
Price to beat on a one-way flight from London Heathrow to San Francisco.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 27 July 2026.
Use the filters below to find and compare flights from London Heathrow Airport to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 23/9

7:00 a.m.-4:15 p.m.

2 stops17h 15m

San Francisco

Sun 27/9

7:35 p.m.-5:50 p.m.

1 stop14h 15m

C$ 965

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 8/9

8:05 p.m.-4:35 p.m.

1 stop28h 30m

San Francisco

Tue 29/9

7:35 p.m.-9:30 p.m.

2 stops17h 55m

C$ 969

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 8/9

7:00 a.m.-4:15 p.m.

2 stops17h 15m

San Francisco

Tue 15/9

7:35 p.m.-9:30 p.m.

2 stops17h 55m

C$ 1,012

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 2/11

2:25 p.m.-4:30 p.m.

2 stops58h 05m

San Francisco

Sun 8/11

7:25 p.m.-9:25 p.m.

2 stops18h 00m

C$ 1,022

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 17/8

4:15 p.m.-7:10 p.m.

Nonstop10h 55m

San Francisco

Sun 23/8

12:45 a.m.-7:45 a.m.

1 stop23h 00m

C$ 1,046

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 24/8

9:05 p.m.-2:40 p.m.

2 stops25h 35m

San Francisco

Sun 6/9

4:45 p.m.-6:30 p.m.

1 stop17h 45m

C$ 1,046

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 4/9

7:00 a.m.-4:15 p.m.

2 stops17h 15m

San Francisco

Wed 16/9

7:35 p.m.-9:30 p.m.

2 stops17h 55m

C$ 1,051
Quickest round-trip

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 23/8

12:45 p.m.-3:45 p.m.

Nonstop11h 00m

San Francisco

Sat 5/9

5:55 p.m.-12:15 p.m.

Nonstop10h 20m

C$ 1,078

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 8/9

7:50 p.m.-2:40 p.m.

2 stops26h 50m

San Francisco

Tue 29/9

4:45 p.m.-7:55 p.m.

2 stops19h 10m

C$ 1,174

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 5/12

5:25 p.m.-4:30 p.m.

2 stops31h 05m

San Francisco

Wed 16/12

7:25 p.m.-9:25 p.m.

2 stops18h 00m

C$ 1,175

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/7

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Heathrow with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to San Francisco

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

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to San Francisco, you should look to book at least 22 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from London Heathrow Airport to San Francisco?

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of C$ 836). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of C$ 1,219). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to SFO?

Find hourly flight availability from Heathrow to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 27 July 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to San Francisco as you normally would.

How much does it cost to fly round-trip from London Heathrow Airport to San Francisco?

Airfare is below average for this route at the moment.

London Heathrow Airport to San Francisco flights typically cost between C$ 969 and C$ 1,313 in August.
The cheapest round-trip price found within the last 5 days was C$ 860 on United Airlines (22 Aug-22 Aug).

Related info for your journey

Find useful and relevant information for your journey from Heathrow to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to San Francisco from London Heathrow?

    For a flight from London Heathrow to San Francisco, you will be flying into San Francisco. San Francisco (SFO) is just 17.7 km from the centre of the city. San Francisco is the only San Francisco airport and it handles 43 inbound flights from London Heathrow per day. 0 airlines have flights to San Francisco from London Heathrow on a regular basis.

  • How long is the flight from London Heathrow Airport to San Francisco?

    A quick flight from London Heathrow Airport to San Francisco can take about 15h 30m. United Airlines provides one of the quickest options available for as low as C$ 919. Airlines will cover a distance of 8610 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most reliable airlines from London Heathrow Airport to San Francisco?

    Consider SAUDIA (100%), Air Canada (80%) or Austrian Airlines (80%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to San Francisco.

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

    Looking for the cheapest flight from London Heathrow Airport to San Francisco? While on average our users pay C$ 3,523, our data indicates the cheapest price to be C$ 3,044. The most popular route (London Heathrow - San Francisco), is priced around C$ 1,670.

  • Can I find deals for flights from Heathrow to San Francisco that include hotel bookings?

    Yes. In addition to deals on Heathrow to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to San Francisco.

  • Can I find deals for business class flights from Heathrow to San Francisco?

    Yes. Cheapflights offers flight deals from Heathrow to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to San Francisco?

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of C$ 836). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of C$ 1,219). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Clara
Burlingame
San Bruno
Roseville
Livermore
South San Francisco
Novato
Vallejo

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Yes, we can. To see specific flights from Heathrow to San Francisco with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Heathrow to San Francisco become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to San Francisco flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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