Cheap flights from London Heathrow Airport to San Francisco from £385

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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
15 May — 22 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 Thursday or Wednesday and return on a Monday

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 15 April 2026.

Fri 1/506:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Mon 11/516:45
SFO
-
LHR
1 stop15h 15m
Scandinavian Airlines
Deal found 14/4£397
Wed 29/417:45
LHR
-
SFO
1 stop13h 52m
Delta
Fri 8/517:37
SFO
-
LHR
1 stop13h 58m
Delta
Deal found 14/4£402
Tue 28/411:45
LHR
-
SFO
1 stop19h 27m
Delta
Mon 11/511:35
SFO
-
LHR
1 stop14h 45m
Delta
Deal found 14/4£407
Fri 1/516:20
LHR
-
SFO
1 stop17h 03m
Delta
Sat 9/513:35
SFO
-
LHR
1 stop18h 00m
Delta
Deal found 14/4£413
Tue 27/1015:25
LHR
-
SFO
Nonstop11h 20m
British Airways
Tue 3/1117:30
SFO
-
LHR
Nonstop10h 30m
British Airways
Deal found 11/4£414
Wed 8/717:45
LHR
-
SFO
1 stop14h 13m
Delta
Fri 17/717:30
SFO
-
LHR
1 stop14h 05m
Delta
Deal found 14/4£420
Fri 1/514:30
LHR
-
SFO
Nonstop11h 10m
British Airways
Mon 11/516:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 14/4£421
Tue 28/414:30
LHR
-
SFO
Nonstop11h 10m
British Airways
Mon 11/519:30
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 14/4£437
Wed 29/712:50
LHR
-
SFO
1 stop17h 48m
Delta
Mon 17/811:30
SFO
-
LHR
1 stop14h 50m
Delta
Deal found 11/4£440
Fri 26/610:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Fri 3/716:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 14/4£445
Wed 27/506:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Tue 2/616:45
SFO
-
LHR
1 stop16h 55m
Scandinavian Airlines
Deal found 11/4£454
Wed 29/410:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Thu 7/516:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 14/4£455

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 15 April 2026.

Round-trip from

£397

One-way from

£385

Popular in

December

Cheapest in

February

Average price

£486

Good round-trip deal

£503 or less

Good one-way deal

£535 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 1/5-11/5
  • 2 total stops
  • 31h 15m total
  • London to San Francisco
Lufthansa
  • Lufthansa
  • 7/10
  • 1 total stop
  • 15h 35m total
  • London to San Francisco
Highest demand for flights based on searches. 3% potential increase in price (£14 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Average for round-trip flights in April 2026
Price to beat on a round-trip flight from London Heathrow to San Francisco.
Price to beat on a one-way flight from London Heathrow to San Francisco.

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 15 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 return flight

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 27/4

06:30-11:45

1 stop13h 15m

San Francisco

Sun 10/5

17:55-12:15

Nonstop10h 20m

£531

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 14/9

21:05-14:40

2 stops25h 35m

San Francisco

Mon 21/9

16:45-18:50

2 stops18h 05m

£546
Fastest return journey

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 2/5

12:45-15:45

Nonstop11h 00m

San Francisco

Sat 9/5

23:15-17:30

Nonstop10h 15m

£551

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 9/5

06:30-11:45

1 stop13h 15m

San Francisco

Sat 16/5

17:55-12:15

Nonstop10h 20m

£556

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 27/8

06:30-11:45

1 stop13h 15m

San Francisco

Mon 7/9

23:15-17:30

Nonstop10h 15m

£564

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 16/9

12:45-15:45

Nonstop11h 00m

San Francisco

Thu 1/10

23:15-17:30

Nonstop10h 15m

£572

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 9/9

18:30-21:25

Nonstop10h 55m

San Francisco

Tue 15/9

17:55-12:15

Nonstop10h 20m

£588

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 13/5

08:40-16:30

1 stop15h 50m

San Francisco

Fri 22/5

12:15-10:10

1 stop13h 55m

£595

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 27/5

06:30-11:45

1 stop13h 15m

San Francisco

Sat 6/6

13:20-10:00

1 stop12h 40m

£607

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 11/5

20:05-16:25

1 stop28h 20m

San Francisco

Wed 27/5

19:35-21:30

2 stops17h 55m

£621

Flights are sorted by cheapest return flights first.

Deals found on 13/4

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 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 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 return flight from Heathrow to San Francisco. Price data was last updated on 10 April 2026.

The price you pay for your flight from London Heathrow Airport to San Francisco may vary depending on when you book. For the best chance of a lower fare, look to book 60 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 £351). Flying from London Heathrow Airport to San Francisco in July is currently the most expensive (average of £431). 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 15 April 2026.

When flying from London Heathrow Airport to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost for a return flight from London Heathrow Airport to San Francisco?

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 15 April 2026.
See what other customers who have flown with Austrian Airlines,Virgin Atlantic, andUnited 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.

Entertainment

6.8

Comfort

7.3

Overall

7.6

Boarding

7.6

Crew

8.1

Food

6.8

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Entertainment

6.8

Comfort

7.3

Overall

7.6

Boarding

7.6

Crew

8.1

Food

6.8

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Entertainment

6.8

Comfort

7.3

Overall

7.6

Boarding

7.6

Crew

8.1

Food

6.8

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Entertainment

6.8

Comfort

7.3

Overall

7.6

Boarding

7.6

Crew

8.1

Food

6.8

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Entertainment

6.8

Comfort

7.3

Overall

7.6

Boarding

7.6

Crew

8.1

Food

6.8

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Entertainment

6.8

Comfort

7.3

Overall

7.6

Boarding

7.6

Crew

8.1

Food

6.8

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

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?

    Located just 11.0 mi from the city center, San Francisco is the airport most travelers will use when flying to San Francisco from London Heathrow. Booking flights from London Heathrow to San Francisco (SFO) should be relatively easy as there are 37 daily inbound flights from London Heathrow from 18 different airlines.

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

    Delta, Scandinavian Airlines, and KLM can get you from London Heathrow Airport to San Francisco in just under 11h. Your travel time can differ by up to 14h 35m. Airlines will cover a distance of 5350 mi. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from London Heathrow Airport to San Francisco round-trip from £318. Other airlines that can offer you cheap pricing are Air Canada, from £332, and SWISS, from £348. Delta is priced at 37% lower than the current average price of a flight leaving 3 months from now.

  • 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 TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at £268. WestJet flights start at £298 while deals on Virgin Atlantic start at £321 one-way.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London Heathrow Airport to San Francisco on time: Air New Zealand (83%), Air Canada (79%), Austrian Airlines (79%).

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

    The cheapest flight price from London Heathrow Airport to San Francisco is £428. On average you can expect to pay £1,142. The most popular route, (London Heathrow - San Francisco), can usually be booked for £484.

  • 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 holiday 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 £351). Flying from London Heathrow Airport to San Francisco in July is currently the most expensive (average of £431). 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 Cruz
Newark
San Bruno
Bodega Bay
South San Francisco
Sunnyvale

Browse thousands of different options on Cheapflights for your next trip

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Fly from Heathrow to San Francisco on these airlines

Choose from the following airlines for your flight from Heathrow to San Francisco. Flights are based on user searches made on Cheapflights and were last updated on 15 April 2026.

Top 10 airlines flying from Heathrow to San Francisco

Discover the top 10 airlines 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 858,174 searches. Data last updated 15 April 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£318Average£568FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£332Average£411FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
SWISSCheapest£348Average£425FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aer LingusCheapest£349Average£544FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£354Average£517FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£357Average£463FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
United AirlinesCheapest£360Average£504FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Brussels AirlinesCheapest£368Average£505FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£371Average£514FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£373Average£521FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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 Heathrow to San Francisco?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to San Francisco from Heathrow today with Cheapflights!

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Francisco from Heathrow.

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

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

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

Of course! You can now track prices for flights from Heathrow to San Francisco and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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