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Cheap flights from London Heathrow Airport to San Francisco from C$ 848

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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
14 Jul — 21 Jul1
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 81 days in advance, depart on a Wednesday or Tuesday 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 14 June 2026.

Fri 14/811:40 a.m.
LHR
-
SFO
1 stop20h 10m
Delta
Wed 26/82:36 p.m.
SFO
-
LHR
2 stops16h 59m
Delta
Deal found 11/6C$ 976
Tue 11/812:45 p.m.
LHR
-
SFO
Nonstop11h 00m
KLM
Wed 26/85:55 p.m.
SFO
-
LHR
Nonstop10h 20m
KLM
Deal found 10/6C$ 978
Tue 18/86:30 a.m.
LHR
-
SFO
1 stop13h 15m
Delta
Mon 22/29:00 p.m.
SFO
-
LHR
1 stop15h 00m
Delta
Deal found 10/6C$ 979
Sun 28/64:15 p.m.
LHR
-
SFO
Nonstop10h 55m
Multiple Airlines
Sun 12/77:35 p.m.
SFO
-
LHR
1 stop14h 15m
Multiple Airlines
Deal found 14/6C$ 980
Fri 14/811:40 a.m.
LHR
-
SFO
1 stop20h 10m
Delta
Sat 29/86:20 a.m.
SFO
-
LHR
1 stop25h 15m
Delta
Deal found 11/6C$ 982
Sat 15/83:15 p.m.
LHR
-
SFO
1 stop16h 43m
Delta
Thu 18/24:45 p.m.
SFO
-
LHR
Nonstop10h 10m
Delta
Deal found 10/6C$ 985
Sat 26/912:45 p.m.
LHR
-
SFO
Nonstop11h 00m
Delta
Tue 13/1011:15 p.m.
SFO
-
LHR
Nonstop10h 15m
Delta
Deal found 11/6C$ 986
Sun 16/810:55 a.m.
LHR
-
SFO
1 stop21h 02m
Delta
Fri 28/87:25 p.m.
SFO
-
LHR
2 stops16h 45m
Delta
Deal found 14/6C$ 987
Thu 10/1212:30 p.m.
LHR
-
SFO
1 stop15h 53m
British Airways
Thu 17/125:30 p.m.
SFO
-
LHR
Nonstop10h 30m
British Airways
Deal found 12/6C$ 989
Sun 16/810:55 a.m.
LHR
-
SFO
1 stop21h 02m
Delta
Sat 5/95:36 p.m.
SFO
-
LHR
1 stop13h 59m
Delta
Deal found 13/6C$ 990
Mon 15/66:00 a.m.
LHR
-
SFO
2 stops43h 05m
TAP AIR PORTUGAL
Fri 1/17:15 p.m.
SFO
-
LHR
1 stop18h 20m
TAP AIR PORTUGAL
Deal found 12/6C$ 992
Fri 14/811:40 a.m.
LHR
-
SFO
1 stop20h 10m
Delta
Sun 21/23:40 p.m.
SFO
-
LHR
1 stop14h 05m
Delta
Deal found 10/6C$ 993

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 14 June 2026.

Round-trip from

C$ 976

One-way from

C$ 848

Popular in

December

Cheapest in

February

Average price

C$ 1,078

Good round-trip deal

C$ 3,912 or less

Good one-way deal

C$ 3,081 or less
Delta
  • Delta
  • 14/8-26/8
  • 3 total stops
  • 37h 09m total
  • London to San Francisco
Search Deals
United Airlines
  • United Airlines
  • 23/8
  • Nonstop
  • 11h 00m total
  • London to San Francisco
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (C$ 8 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 14 June 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

Sat 15/8

3:15 p.m.-11:58 p.m.

1 stop16h 43m

San Francisco

Wed 17/2

4:15 p.m.-4:50 p.m.

1 stop16h 35m

C$ 985

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 17/8

6:30 a.m.-3:50 p.m.

2 stops17h 20m

San Francisco

Tue 1/9

11:30 a.m.-11:20 a.m.

1 stop15h 50m

C$ 1,001

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 24/6

7:30 a.m.-3:15 p.m.

1 stop15h 45m

San Francisco

Sun 9/8

7:50 p.m.-2:10 p.m.

Nonstop10h 20m

C$ 1,003

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 30/8

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

1 stop13h 15m

San Francisco

Tue 15/9

8:55 a.m.-6:45 a.m.

1 stop13h 50m

C$ 1,038

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 9/9

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

2 stops26h 50m

San Francisco

Tue 15/9

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

2 stops18h 05m

C$ 1,045

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 7/9

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

2 stops26h 50m

San Francisco

Sun 27/9

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

2 stops18h 05m

C$ 1,048
Quickest round-trip

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 24/6

1:00 p.m.-4:05 p.m.

Nonstop11h 05m

San Francisco

Thu 13/8

4:45 p.m.-11:10 a.m.

Nonstop10h 25m

C$ 1,048

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 21/7

7:45 a.m.-7:28 p.m.

1 stop19h 43m

San Francisco

Sun 26/7

7:50 p.m.-2:10 p.m.

Nonstop10h 20m

C$ 1,053

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 20/9

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

2 stops29h 00m

San Francisco

Sun 25/10

8:25 p.m.-9:25 p.m.

2 stops18h 00m

C$ 1,112

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 7/7

8:45 a.m.-4:35 p.m.

1 stop15h 50m

San Francisco

Sun 23/8

12:35 p.m.-9:40 a.m.

1 stop13h 05m

C$ 1,112

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

Showing 1-10 of 23 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?

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 80 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$ 800). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of C$ 1,217). 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 14 June 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 41 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 45m. Delta provides one of the quickest options available for as low as C$ 1,003. 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 Canada (89%), Austrian Airlines (89%) or United Airlines (89%) 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$ 3,497, our data indicates the cheapest price to be C$ 3,021. The most popular route (London Heathrow - San Francisco), is priced around C$ 1,657.

  • 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$ 800). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of C$ 1,217). 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
Burlingame
San Bruno
Roseville
Livermore
South San Francisco
Novato
Vallejo

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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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