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Cheap flights from San Francisco to London Heathrow Airport from £268

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 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LHR
14 Mar — 21 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Francisco to London Heathrow are usually found in February or October, booked 63 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Cheap flight deals from San Francisco to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco to Heathrow
Explore the most affordable flight options available from San Francisco to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 February 2026.

Sun 15/219:25
SFO
-
LHR
1 stop14h 25m
SWISS
Tue 3/309:00
LHR
-
SFO
1 stop15h 30m
SWISS
Deal found 9/2£437
Sun 22/219:25
SFO
-
LHR
1 stop14h 25m
SWISS
Tue 3/309:00
LHR
-
SFO
1 stop15h 30m
SWISS
Deal found 11/2£438
Sun 15/216:30
SFO
-
LHR
Nonstop10h 20m
Virgin Atlantic
Tue 3/306:30
LHR
-
SFO
1 stop13h 20m
Virgin Atlantic
Deal found 10/2£439
Mon 7/916:45
SFO
-
LHR
1 stop32h 35m
Scandinavian Airlines
Wed 16/910:20
LHR
-
SFO
1 stop36h 20m
Scandinavian Airlines
Deal found 10/2£440
Sun 8/317:40
SFO
-
LHR
2 stops20h 55m
Scandinavian Airlines
Fri 13/306:40
LHR
-
SFO
1 stop15h 55m
Scandinavian Airlines
Deal found 10/2£441
Sun 15/218:20
SFO
-
LHR
1 stop14h 30m
Aer Lingus
Wed 18/209:50
LHR
-
SFO
1 stop13h 45m
Aer Lingus
Deal found 10/2£441
Sun 1/316:40
SFO
-
LHR
1 stop15h 20m
Scandinavian Airlines
Tue 28/406:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Deal found 10/2£442
Mon 23/216:40
SFO
-
LHR
1 stop17h 00m
Scandinavian Airlines
Sat 28/217:00
LHR
-
SFO
1 stop29h 35m
Scandinavian Airlines
Deal found 9/2£443
Fri 6/316:40
SFO
-
LHR
2 stops17h 50m
Scandinavian Airlines
Fri 13/321:05
LHR
-
SFO
2 stops25h 30m
Scandinavian Airlines
Deal found 10/2£444
Wed 15/421:05
SFO
-
LHR
1 stop14h 35m
Multiple Airlines
Wed 22/408:40
LHR
-
SFO
1 stop15h 35m
Multiple Airlines
Deal found 10/2£445

Find flight deals from San Francisco to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Heathrow (LHR). 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 February 2026.

Round-trip from

£437

One-way from

£268

Popular in

June

Cheapest in

February

Average price

£482

Good round-trip deal

£488 or less

Good one-way deal

£268 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 9/3-3/4
  • 2 total stops
  • 42h 30m total
  • San Francisco to London
Search Deals
Iberia
  • Iberia
  • 4/3
  • 1 total stop
  • 14h 50m total
  • San Francisco to London
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£93 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from San Francisco to London Heathrow.
Search Deals
Price to beat on a one-way flight from San Francisco to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco to Heathrow 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 858,174 searches. Data last updated 12 February 2026.
Use the filters below to find and compare flights from San Francisco to London Heathrow Airport that are best for you.

Fly from

San Francisco

Fly to

Heathrow

Route

Depart

Return

Price

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 9/3

18:25-12:00

Nonstop10h 35m

London Heathrow

Mon 16/3

07:40-15:50

1 stop15h 10m

£452

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 31/3

17:55-12:15

Nonstop10h 20m

London Heathrow

Wed 22/4

06:30-11:45

1 stop13h 15m

£464

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 31/3

12:50-07:25

Nonstop10h 35m

London Heathrow

Thu 9/4

07:25-14:30

1 stop15h 05m

£464

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 21/4

07:25-13:20

1 stop21h 55m

London Heathrow

Wed 29/4

06:55-14:30

1 stop15h 35m

£464

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 26/4

16:45-18:50

2 stops18h 05m

London Heathrow

Wed 6/5

19:30-14:40

1 stop27h 10m

£466

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 11/3

17:30-10:50

Nonstop10h 20m

London Heathrow

Wed 18/3

11:40-15:40

Nonstop11h 00m

£474

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 19/4

16:45-16:00

1 stop15h 15m

London Heathrow

Mon 27/4

06:40-14:40

1 stop16h 00m

£474

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 25/2

12:50-07:25

Nonstop10h 35m

London Heathrow

Wed 4/3

13:45-17:00

Nonstop11h 15m

£474

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Thu 5/3

17:25-12:00

Nonstop10h 35m

London Heathrow

Thu 12/3

06:35-15:50

1 stop16h 15m

£474

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Thu 26/2

17:25-12:00

Nonstop10h 35m

London Heathrow

Tue 3/3

06:35-14:50

1 stop16h 15m

£474

Flights are sorted by cheapest return flights first.

Deals found on 11/2

Showing 1-10 of 22 results
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Best time to book a flight from San Francisco to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Francisco with our price prediction graph.
Estimated return 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 San Francisco to London Heathrow Airport

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

Use this chart to determine the optimal time to book a return flight from San Francisco to Heathrow. Price data was last updated on 6 February 2026.

Booking 63 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, October is the cheapest month in which you can book a flight from San Francisco to London Heathrow Airport (average of £364). Flying from San Francisco to London Heathrow Airport in June is currently the most expensive (average of £575). 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 SFO to LHR?

Find hourly flight availability from San Francisco to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 February 2026.

When flying from San Francisco to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 31% versus a flight at midday.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 12 February 2026.
See what other customers who have flown with KLM, Virgin Atlantic, andUnited Airlines from San Francisco to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,452 reviews
Check prices

Overall

7.7

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,452 reviews
KLM
7.7
Good
1,452 reviews
Check prices

Overall

7.7

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Virgin Atlantic
7.5
Good
678 reviews
KLM
7.7
Good
1,452 reviews
Check prices

Overall

7.7

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
United Airlines
7.4
Good
9,285 reviews
KLM
7.7
Good
1,452 reviews
Check prices

Overall

7.7

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Lufthansa
6.8
Okay
7,782 reviews
KLM
7.7
Good
1,452 reviews
Check prices

Overall

7.7

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
British Airways
6.7
Okay
7,737 reviews
KLM
7.7
Good
1,452 reviews
Check prices

Overall

7.7

Boarding

7.8

Food

7.3

Entertainment

7.1

Crew

8.4

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Heathrow. 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 from for flights from San Francisco to London Heathrow?

    For a flight from San Francisco to London Heathrow, you will be flying from San Francisco. San Francisco (SFO) is just 11.8 mi from the center of the city. San Francisco is the only San Francisco airport and it handles 31 outbound flights to London Heathrow per day. 6 airlines have flights to London Heathrow from San Francisco on a regular basis.

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

    Airlines like United Airlines, Delta, and Scandinavian Airlines fly from San Francisco to London Heathrow Airport in about 10h 20m. The time it takes to get you to your destination can typically vary by up to 7h 45m. Airlines will cover a distance of 5350 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from San Francisco to London Heathrow Airport round-trip?

    Currently priced at £358, KLM will fly you from San Francisco to London Heathrow Airport and back. In addition to KLM, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Virgin Atlantic and Lufthansa - these airlines can fly you to your destination from £362 and £365, respectively. Users have found that KLM is 35% cheaper than the other options available to this destination.

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

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at £241. Virgin Atlantic flights start at £257 while deals on KLM start at £261 one-way.

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

    Consider Air Canada (82%), Austrian Airlines (82%) or United Airlines (82%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to London Heathrow Airport.

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

    On average you can expect to pay £1,237 for a flight from San Francisco to London Heathrow Airport. The cheapest flight overall is £171 while the most popular route, (San Francisco - London Heathrow) is currently priced at £338.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Francisco to Heathrow 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 San Francisco to London Heathrow Airport?

    Currently, October is the cheapest month in which you can book a flight from San Francisco to London Heathrow Airport (average of £364). Flying from San Francisco to London Heathrow Airport in June is currently the most expensive (average of £575). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Luton
Wembley
Northampton
Gatwick
Slough
Hounslow
Ilford
Hayes
Brentford
Colchester
Watford
Guildford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames
Ipswich
Swindon

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 6 airlines flying from San Francisco to Heathrow

Discover the top 6 airlines that operate flights from San Francisco to Heathrow. 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 858,174 searches. Data last updated 12 February 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£358Average£536FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£362Average£534FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£365Average£641FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£380Average£502FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£396Average£573FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£418Average£557FlexibilityNo cancel feeOn-time77%
Search Iberia flights

Fly with Cheapflights

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

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

Cheapflights helps you search for flights from San Francisco to Heathrow via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights simply makes it quick and affordable to book flights from San Francisco to Heathrow by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Yes! Cheapflights helps users easily find flights from San Francisco to Heathrow with no change fees.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Heathrow from San Francisco today and book when prices fit your budget.

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