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Cheap flights from London Heathrow Airport to San Francisco from C$ 654

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 6/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from London Heathrow to San Francisco are usually found in February or November, booked 82 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap 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 11 September 2025.

Round-trip from

C$ 740

One-way from

C$ 654

Popular in

July

Cheapest in

February

Average price

C$ 831

Good one-way deal

C$ 2,978 or less
United Airlines
  • United Airlines
  • 4/10-7/10
  • Nonstop
  • 21h 25m total
  • London to San Francisco
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British Airways
  • British Airways
  • 6/11
  • 2 total stops
  • 33h 45m total
  • London to San Francisco
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Highest demand for flights based on searches. 14% potential increase in price (C$ 223 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 36 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a one-way flight from London Heathrow to San Francisco.
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Find flight deals from Heathrow to San Francisco

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 11 September 2025.

Sat 20/94:15 p.m.LHR - SFO
Nonstop11h 00mUnited Airlines
Wed 8/1011:59 p.m.SFO - LHR
1 stop23h 41mUnited Airlines
Deal found 11/9C$ 740
Tue 4/1111:45 a.m.LHR - SFO
Nonstop11h 15mBritish Airways
Tue 11/118:40 p.m.SFO - LHR
Nonstop10h 30mBritish Airways
Deal found 11/9C$ 741
Mon 10/116:30 a.m.LHR - SFO
1 stop13h 20mDelta
Sat 22/1112:45 a.m.SFO - LHR
1 stop22h 20mDelta
Deal found 11/9C$ 747
Fri 19/93:10 p.m.LHR - SFO
1 stop16h 05mBritish Airways
Thu 9/103:50 p.m.SFO - LHR
1 stop16h 15mBritish Airways
Deal found 11/9C$ 748
Sat 6/121:45 p.m.LHR - SFO
Nonstop11h 15mUnited Airlines
Tue 16/128:30 a.m.SFO - LHR
1 stop14h 00mUnited Airlines
Deal found 11/9C$ 750
Thu 30/1011:40 a.m.LHR - SFO
Nonstop11h 00mDelta
Wed 5/1112:35 a.m.SFO - LHR
1 stop22h 30mDelta
Deal found 9/9C$ 754
Sat 1/1111:40 a.m.LHR - SFO
Nonstop11h 00mDelta
Fri 14/1112:45 a.m.SFO - LHR
1 stop22h 20mDelta
Deal found 11/9C$ 755
Thu 18/94:15 p.m.LHR - SFO
Nonstop11h 00mUnited Airlines
Wed 1/1011:40 a.m.SFO - LHR
1 stop13h 55mUnited Airlines
Deal found 11/9C$ 757
Sun 7/1212:35 p.m.LHR - SFO
1 stop15h 55mBritish Airways
Mon 15/125:30 p.m.SFO - LHR
Nonstop10h 30mBritish Airways
Deal found 11/9C$ 762
Tue 30/911:15 a.m.LHR - SFO
Nonstop11h 00mDelta
Wed 22/1012:35 a.m.SFO - LHR
1 stop28h 35mDelta
Deal found 10/9C$ 764
Sun 28/91:05 p.m.LHR - SFO
1 stop15h 05mUnited Airlines
Sun 5/1011:40 a.m.SFO - LHR
1 stop13h 55mUnited Airlines
Deal found 10/9C$ 765
Wed 8/108:40 a.m.LHR - SFO
1 stop15h 30mUnited Airlines
Tue 28/106:25 p.m.SFO - LHR
Nonstop10h 35mUnited Airlines
Deal found 9/9C$ 766

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 11 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to San Francisco that are best for you.

Fly from

Heathrow

Fly to

San Francisco

Route

Depart

Return

Price

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 9/2

1:45 p.m.-5:00 p.m.

Nonstop11h 15m

San Francisco

Mon 16/2

12:50 p.m.-7:25 a.m.

Nonstop10h 35m

C$ 740

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 5/3

1:45 p.m.-5:00 p.m.

Nonstop11h 15m

San Francisco

Mon 9/3

1:50 p.m.-7:25 a.m.

Nonstop10h 35m

C$ 740

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 6/12

6:30 a.m.-11:50 a.m.

1 stop13h 20m

San Francisco

Sun 14/12

12:45 a.m.-7:05 a.m.

1 stop22h 20m

C$ 747

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 1/11

11:40 a.m.-3:40 p.m.

Nonstop11h 00m

San Francisco

Wed 12/11

12:45 a.m.-7:05 a.m.

1 stop22h 20m

C$ 755

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 31/10

11:40 a.m.-3:40 p.m.

Nonstop11h 00m

San Francisco

Sat 15/11

12:45 a.m.-7:05 a.m.

1 stop22h 20m

C$ 755

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 18/1

8:55 a.m.-10:12 p.m.

2 stops21h 17m

San Francisco

Sat 31/1

4:30 p.m.-10:40 a.m.

Nonstop10h 10m

C$ 758

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 8/10

8:40 a.m.-4:10 p.m.

1 stop15h 30m

San Francisco

Tue 28/10

6:25 p.m.-12:00 p.m.

Nonstop10h 35m

C$ 766

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 13/2

11:40 a.m.-2:40 p.m.

Nonstop11h 00m

San Francisco

Thu 26/2

12:40 a.m.-7:05 a.m.

1 stop22h 25m

C$ 766

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 9/2

11:40 a.m.-2:40 p.m.

Nonstop11h 00m

San Francisco

Sun 15/2

12:40 a.m.-7:05 a.m.

1 stop22h 25m

C$ 766

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 14/10

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

1 stop15h 50m

San Francisco

Mon 20/10

9:00 p.m.-8:40 p.m.

1 stop15h 40m

C$ 768

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 21 results
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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 29 August 2025.

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 82 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of C$ 276). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of C$ 368). 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 11 September 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 14% on flights from London Heathrow Airport to San Francisco by exploring options for tickets at noon.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated 11 September 2025.
See what other customers who have flown with United Airlines from London Heathrow Airport to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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 19.0 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. 1 airline has 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 11h 15m. Lufthansa provides one of the quickest options available for as low as C$ 740. Airlines will cover a distance of 8610 km. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from London Heathrow Airport to San Francisco round-trip?

    Cheapflights users have booked flights from London Heathrow Airport to San Francisco round-trip from C$ 882. United Airlines is currently priced 5% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from London Heathrow Airport to San Francisco one-way?

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at C$ 683. Finnair flights start at C$ 704 while deals on Delta start at C$ 705 one-way.

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

    Consider KLM (86%), Air France (86%) or Delta (86%) 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$ 2,978, our data indicates the cheapest price to be C$ 2,978. The most popular route (London Heathrow - San Francisco), is priced around C$ 722.

  • 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of C$ 276). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of C$ 368). 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
Richmond
Newark
Alameda
Redwood City
Burlingame
San Bruno
South San Francisco
Scotts Valley
Belmont
Novato
Millbrae
Santa Clara
Vallejo

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Heathrow to San Francisco

Discover the top airline that operate flights from Heathrow to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 882AverageC$ 882FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to San Francisco?

Cheapflights makes it easy to find Heathrow to San Francisco flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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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