Cheap flights from London Heathrow Airport to San Francisco from £447

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 22/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
13 Jul — 20 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 Thursday and return on a Wednesday

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 13 June 2026.

Fri 14/811:40
LHR
-
SFO
1 stop20h 10m
Delta
Wed 26/814:36
SFO
-
LHR
2 stops16h 59m
Delta
Deal found 11/6£520
Fri 19/610:05
LHR
-
SFO
1 stop18h 56m
Iberia
Thu 25/613:35
SFO
-
LHR
1 stop13h 30m
Iberia
Deal found 12/6£521
Tue 18/806:30
LHR
-
SFO
1 stop13h 15m
Delta
Mon 22/216:45
SFO
-
LHR
Nonstop10h 10m
Delta
Deal found 10/6£522
Tue 18/812:45
LHR
-
SFO
Nonstop11h 00m
Delta
Tue 1/910:40
SFO
-
LHR
1 stop17h 30m
Delta
Deal found 12/6£523
Fri 14/811:40
LHR
-
SFO
1 stop20h 10m
Delta
Sat 29/806:20
SFO
-
LHR
1 stop25h 15m
Delta
Deal found 11/6£523
Sun 11/1019:30
LHR
-
SFO
1 stop27h 10m
Scandinavian Airlines
Wed 14/1016:45
SFO
-
LHR
2 stops18h 05m
Scandinavian Airlines
Deal found 8/6£524
Tue 23/608:45
LHR
-
SFO
1 stop15h 30m
SWISS
Thu 16/719:35
SFO
-
LHR
1 stop14h 15m
SWISS
Deal found 8/6£525
Sat 26/912:45
LHR
-
SFO
Nonstop11h 00m
Delta
Wed 7/1023:15
SFO
-
LHR
Nonstop10h 15m
Delta
Deal found 11/6£526
Wed 24/608:40
LHR
-
SFO
1 stop15h 35m
SWISS
Thu 16/719:35
SFO
-
LHR
1 stop14h 15m
SWISS
Deal found 10/6£526
Mon 10/810:45
LHR
-
SFO
1 stop15h 28m
Delta
Tue 25/806:00
SFO
-
LHR
1 stop16h 25m
Delta
Deal found 11/6£527
Mon 15/613:00
LHR
-
SFO
Nonstop11h 05m
United Airlines
Mon 22/616:45
SFO
-
LHR
Nonstop10h 25m
United Airlines
Deal found 8/6£528
Mon 15/606:00
LHR
-
SFO
2 stops43h 05m
TAP AIR PORTUGAL
Fri 1/119:15
SFO
-
LHR
1 stop18h 20m
TAP AIR PORTUGAL
Deal found 12/6£529

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 13 June 2026.

Round-trip from

£520

One-way from

£447

Popular in

December

Cheapest in

February

Average price

£572

Good round-trip deal

£600 or less

Good one-way deal

£641 or less
Delta
  • Delta
  • 14/8-28/8
  • 3 total stops
  • 39h 08m total
  • London to San Francisco
22/6
  • 22/6
  • 1 total stop
  • 30h 50m total
  • London to San Francisco
Highest demand for flights based on searches. 0% potential increase in price (£2 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Average for round-trip flights in June 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 13 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 return flight

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 15/8

15:15-23:58

1 stop16h 43m

San Francisco

Wed 26/8

16:05-06:20

1 stop30h 15m

£520

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 17/8

06:30-15:50

2 stops17h 20m

San Francisco

Tue 1/9

11:30-11:20

1 stop15h 50m

£534
Fastest return journey

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 21/8

12:45-15:45

Nonstop11h 00m

San Francisco

Sun 30/8

14:00-15:35

1 stop17h 35m

£535

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 23/9

21:05-14:40

2 stops25h 35m

San Francisco

Sun 27/9

16:45-18:50

2 stops18h 05m

£549

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 5/12

15:35-14:50

2 stops31h 15m

San Francisco

Fri 11/12

16:45-09:35

2 stops32h 50m

£557

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 19/8

13:00-16:00

Nonstop11h 00m

San Francisco

Wed 2/9

23:30-06:45

1 stop23h 15m

£559

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 21/7

07:45-19:28

1 stop19h 43m

San Francisco

Sun 26/7

19:50-14:10

Nonstop10h 20m

£562

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 8/10

07:00-16:15

2 stops17h 15m

San Francisco

Thu 15/10

19:35-21:30

2 stops17h 55m

£567

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 24/6

07:00-16:15

2 stops17h 15m

San Francisco

Wed 15/7

19:35-17:50

1 stop14h 15m

£581

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 25/6

07:00-16:15

2 stops17h 15m

San Francisco

Sat 5/9

19:35-21:30

2 stops17h 55m

£644

Flights are sorted by cheapest return flights first.

Deals found on 9/6

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

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?

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 80 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 £427). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of £650). 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 13 June 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 13 June 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.

Overall

7.6

Comfort

7.3

Entertainment

6.8

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.

Overall

7.6

Comfort

7.3

Entertainment

6.8

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.

Overall

7.6

Comfort

7.3

Entertainment

6.8

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.

Overall

7.6

Comfort

7.3

Entertainment

6.8

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.

Overall

7.6

Comfort

7.3

Entertainment

6.8

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.

Overall

7.6

Comfort

7.3

Entertainment

6.8

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 42 daily inbound flights from London Heathrow from 19 different airlines.

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

    Delta and Scandinavian Airlines can get you from London Heathrow Airport to San Francisco in just under 16h 43m. Your travel time can differ by up to 8h 52m. 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 £321. Other airlines that can offer you cheap pricing are SWISS, from £351, and Aer Lingus, from £353. Delta is priced at 40% 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 £273. Virgin Atlantic flights start at £325 while deals on Iberia start at £326 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 Canada (89%), Austrian Airlines (89%), United Airlines (89%).

  • 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 £1,190. The most popular route, (London Heathrow - San Francisco), can usually be booked for £400.

  • 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 £427). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of £650). 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
San Bruno
Newark
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 13 June 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 13 June 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£321Average£628FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
SWISSCheapest£351Average£429FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aer LingusCheapest£353Average£585FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£357Average£493FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£360Average£470FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£372Average£519FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Austrian AirlinesCheapest£375Average£501FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
LufthansaCheapest£377Average£544FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£378Average£574FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Virgin AtlanticCheapest£384Average£553FlexibilityNo 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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