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Cheap flights from London Heathrow Airport to San Francisco from C$ 721

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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
12 May — 19 May1
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 60 days in advance, depart on a Wednesday or Thursday and return on a Thursday

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 12 April 2026.

Fri 15/56:30 a.m.
LHR
-
SFO
1 stop13h 15m
Delta
Sun 17/52:43 p.m.
SFO
-
LHR
1 stop16h 17m
Delta
Deal found 12/4C$ 977
Sun 10/56:30 a.m.
LHR
-
SFO
1 stop13h 15m
Delta
Mon 18/58:29 p.m.
SFO
-
LHR
1 stop13h 06m
Delta
Deal found 12/4C$ 978
Sun 3/56:30 a.m.
LHR
-
SFO
1 stop13h 15m
KLM
Sun 10/511:15 p.m.
SFO
-
LHR
Nonstop10h 15m
KLM
Deal found 11/4C$ 980
Mon 11/56:30 a.m.
LHR
-
SFO
1 stop13h 15m
Delta
Wed 27/51:35 p.m.
SFO
-
LHR
1 stop14h 35m
Delta
Deal found 8/4C$ 981
Tue 28/46:30 a.m.
LHR
-
SFO
1 stop13h 15m
Delta
Sat 9/511:15 p.m.
SFO
-
LHR
Nonstop10h 15m
Delta
Deal found 11/4C$ 983
Tue 28/46:30 a.m.
LHR
-
SFO
1 stop13h 15m
KLM
Tue 5/511:50 a.m.
SFO
-
LHR
1 stop14h 30m
KLM
Deal found 8/4C$ 984
Thu 23/46:30 a.m.
LHR
-
SFO
1 stop13h 15m
Delta
Mon 4/55:50 a.m.
SFO
-
LHR
1 stop17h 20m
Delta
Deal found 12/4C$ 985
Tue 21/46:30 a.m.
LHR
-
SFO
1 stop13h 15m
Delta
Tue 28/411:15 p.m.
SFO
-
LHR
Nonstop10h 15m
Delta
Deal found 11/4C$ 987
Mon 11/56:15 a.m.
LHR
-
SFO
1 stop14h 35m
Delta
Sun 17/58:29 p.m.
SFO
-
LHR
1 stop13h 06m
Delta
Deal found 12/4C$ 988
Sat 25/411:30 a.m.
LHR
-
SFO
1 stop14h 30m
Delta
Sat 9/52:43 p.m.
SFO
-
LHR
1 stop16h 17m
Delta
Deal found 11/4C$ 990
Sun 19/46:30 a.m.
LHR
-
SFO
2 stops19h 46m
Delta
Sun 26/411:00 a.m.
SFO
-
LHR
1 stop15h 15m
Delta
Deal found 12/4C$ 992

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 12 April 2026.

Round-trip from

C$ 977

One-way from

C$ 721

Popular in

December

Cheapest in

February

Average price

C$ 912

Good round-trip deal

C$ 763 or less

Good one-way deal

C$ 3,048 or less
Delta
  • Delta
  • 16/5-18/5
  • 1 total stop
  • 23h 30m total
  • London to San Francisco
Search Deals
United Airlines
  • United Airlines
  • 2/9
  • Nonstop
  • 11h 05m total
  • London to San Francisco
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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.
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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 12 April 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

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

2 stops25h 35m

San Francisco

Wed 30/9

4:45 p.m.-6:50 p.m.

2 stops18h 05m

C$ 1,014

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 16/6

6:30 a.m.-11:45 a.m.

1 stop13h 15m

San Francisco

Wed 24/6

1:20 p.m.-10:00 a.m.

1 stop12h 40m

C$ 1,031

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 6/5

9:45 a.m.-5:58 p.m.

1 stop16h 13m

San Francisco

Sun 10/5

9:45 p.m.-9:40 p.m.

1 stop15h 55m

C$ 1,046
Quickest round-trip

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 29/4

6:30 p.m.-9:25 p.m.

Nonstop10h 55m

San Francisco

Thu 7/5

11:15 p.m.-5:30 p.m.

Nonstop10h 15m

C$ 1,060

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 22/6

5:45 p.m.-11:59 p.m.

1 stop14h 14m

San Francisco

Wed 1/7

1:45 p.m.-2:35 p.m.

1 stop16h 50m

C$ 1,064

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 1/9

2:30 p.m.-5:40 p.m.

Nonstop11h 10m

San Francisco

Tue 8/9

7:30 p.m.-1:55 p.m.

Nonstop10h 25m

C$ 1,084

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 9/7

2:30 p.m.-9:17 p.m.

1 stop14h 47m

San Francisco

Sun 19/7

11:15 p.m.-5:30 p.m.

Nonstop10h 15m

C$ 1,086

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 25/6

9:40 a.m.-12:33 a.m.

1 stop22h 53m

San Francisco

Sun 5/7

1:38 p.m.-12:10 p.m.

1 stop14h 32m

C$ 1,097

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 28/7

6:35 p.m.-10:15 a.m.

1 stop23h 40m

San Francisco

Tue 18/8

4:15 p.m.-5:35 p.m.

1 stop17h 20m

C$ 1,110

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 10/8

4:10 p.m.-10:39 p.m.

1 stop14h 29m

San Francisco

Mon 17/8

4:35 p.m.-11:00 a.m.

Nonstop10h 25m

C$ 1,136

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/4

Showing 1-10 of 21 resultsSorted by cheapest first
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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?

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to San Francisco. Price data was last updated on 10 April 2026.

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 60 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$ 657). Flying from London Heathrow Airport to San Francisco in July is currently the most expensive (average of C$ 808). 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 12 April 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?

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 36 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 13h 15m. Scandinavian Airlines provides one of the quickest options available for as low as C$ 1,031. 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 Air New Zealand (83%), Air Canada (79%) or Austrian Airlines (79%) 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$ 2,570, our data indicates the cheapest price to be C$ 763. The most popular route (London Heathrow - San Francisco), is priced around C$ 1,376.

  • 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$ 657). Flying from London Heathrow Airport to San Francisco in July is currently the most expensive (average of C$ 808). 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
San Bruno
Burlingame
Roseville
Livermore
South San Francisco
Novato
Santa Clara
Vallejo

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Why should you use Cheapflights to find cheap flight tickets from Heathrow to San Francisco?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to San Francisco for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Heathrow to San Francisco with no change fees?

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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