Cheap flights from London Heathrow Airport to San Francisco from £363

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 14/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
7 Feb — 14 Feb1
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 45 days in advance, depart on a Thursday or Wednesday 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 8 January 2026.

Round-trip from

£407

One-way from

£363

Popular in

December

Cheapest in

February

Average price

£483

Good round-trip deal

£517 or less

Good one-way deal

£528 or less
Air Canada
  • Air Canada
  • 16/2-22/2
  • 3 total stops
  • 58h 00m total
  • London to San Francisco
British Airways
  • British Airways
  • 14/5
  • 2 total stops
  • 36h 49m total
  • London to San Francisco
Highest demand for flights based on searches. 4% potential increase in price (£16 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Average for round-trip flights in January 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.

Find 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 8 January 2026.

Mon 16/214:30LHR - SFO
1 stop29h 50mAir Canada
Sun 22/208:25SFO - LHR
2 stops28h 10mAir Canada
Deal found 7/1£407
Mon 22/616:10LHR - SFO
1 stop14h 26mFinnair
Sun 12/707:00SFO - LHR
1 stop16h 20mFinnair
Deal found 7/1£408
Thu 5/209:30LHR - SFO
2 stops19h 23mMultiple Airlines
Sun 15/208:25SFO - LHR
2 stops18h 55mMultiple Airlines
Deal found 7/1£408
Wed 8/414:20LHR - SFO
Nonstop11h 10mBritish Airways
Thu 16/416:35SFO - LHR
Nonstop10h 25mBritish Airways
Deal found 7/1£409
Thu 7/510:35LHR - SFO
Nonstop11h 05mUnited Airlines
Sun 24/519:45SFO - LHR
Nonstop10h 25mUnited Airlines
Deal found 7/1£410
Sat 18/410:35LHR - SFO
Nonstop11h 05mUnited Airlines
Fri 24/412:55SFO - LHR
Nonstop10h 30mUnited Airlines
Deal found 6/1£411
Mon 9/306:40LHR - SFO
1 stop15h 55mScandinavian Airlines
Tue 17/317:40SFO - LHR
2 stops18h 10mScandinavian Airlines
Deal found 7/1£411
Wed 4/209:20LHR - SFO
1 stop17h 35mJetBlue
Fri 6/222:37SFO - LHR
1 stop15h 23mJetBlue
Deal found 6/1£412
Fri 20/308:50LHR - SFO
1 stop14h 45mBritish Airways
Tue 7/410:06SFO - LHR
1 stop13h 59mBritish Airways
Deal found 6/1£413
Wed 8/409:30LHR - SFO
2 stops18h 02mAir Canada
Wed 29/413:20SFO - LHR
1 stop16h 00mAir Canada
Deal found 7/1£414
Wed 24/606:30LHR - SFO
1 stop14h 10mUnited Airlines
Tue 7/708:40SFO - LHR
1 stop17h 30mUnited Airlines
Deal found 7/1£414
Mon 22/616:10LHR - SFO
1 stop14h 26mFinnair
Mon 13/719:30SFO - LHR
Nonstop10h 25mFinnair
Deal found 7/1£415

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 8 January 2026.
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

Sun 10/5

10:35-13:40

Nonstop11h 05m

San Francisco

Sun 17/5

12:55-07:25

Nonstop10h 30m

£410

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 18/4

10:35-13:40

Nonstop11h 05m

San Francisco

Sat 25/4

16:35-11:10

Nonstop10h 35m

£412

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 7/4

13:00-16:10

Nonstop11h 10m

San Francisco

Tue 14/4

12:55-07:25

Nonstop10h 30m

£419

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 28/2

15:35-14:35

2 stops31h 00m

San Francisco

Sat 7/3

16:40-18:50

2 stops18h 10m

£420

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 9/3

19:50-15:35

2 stops26h 45m

San Francisco

Mon 23/3

17:40-16:25

2 stops15h 45m

£420

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 23/5

16:55-23:20

1 stop14h 25m

San Francisco

Fri 5/6

22:03-19:45

1 stop13h 42m

£426

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 31/1

11:45-15:00

Nonstop11h 15m

San Francisco

Fri 6/3

17:30-12:00

Nonstop10h 30m

£429

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 2/7

16:10-22:36

1 stop14h 26m

San Francisco

Thu 30/7

16:35-11:00

Nonstop10h 25m

£431

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 3/7

16:10-22:36

1 stop14h 26m

San Francisco

Wed 29/7

19:20-13:45

Nonstop10h 25m

£431

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 12/5

10:45-13:50

Nonstop11h 05m

San Francisco

Mon 1/6

19:30-13:55

Nonstop10h 25m

£432

Flights are sorted by cheapest return flights first.

Deals found on 6/1

Showing 1-10 of 23 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 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 2 January 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 45 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 £443). 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 8 January 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.

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 8 January 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.

Comfort

7.3

Crew

8.1

Food

6.8

Entertainment

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

Comfort

7.3

Crew

8.1

Food

6.8

Entertainment

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

Comfort

7.3

Crew

8.1

Food

6.8

Entertainment

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

Comfort

7.3

Crew

8.1

Food

6.8

Entertainment

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

Comfort

7.3

Crew

8.1

Food

6.8

Entertainment

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

Comfort

7.3

Crew

8.1

Food

6.8

Entertainment

6.8

Overall

7.6

Boarding

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

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 11.8 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 30 daily inbound flights from London Heathrow from 18 different airlines.

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

    United Airlines and Scandinavian Airlines can get you from London Heathrow Airport to San Francisco in just under 11h 05m. Your travel time can differ by up to 19h 55m. 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 £236. Other airlines that can offer you cheap pricing are Air Canada, from £334, and United Airlines, from £349. Delta is priced at 53% 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 Scandinavian Airlines, which is currently one of the cheapest options available, starting at £248. TAP AIR PORTUGAL flights start at £269 while deals on WestJet start at £299 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 (88%), Austrian Airlines (88%), United Airlines (88%).

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

    The cheapest flight price from London Heathrow Airport to San Francisco is £379. On average you can expect to pay £2,001. The most popular route, (London Heathrow - San Francisco), can usually be booked for £306.

  • Where are the most common stopover locations when flying from London Heathrow Airport to San Francisco?

  • What are some popular things to do or see while on a stopover in Copenhagen?

    The majority of Copenhagen visitors spend their time at Tivoli, Rådhuspladsen, and Opera House. Tivoli, Rådhuspladsen, and Opera House can be visited by traveling about 5.3 mi, 5.2 mi, and 4.9 mi respectively from Kastrup Copenhagen. Those on a stopover in Copenhagen in need of a car hire can book one at Kastrup Copenhagen for about £28.

  • Where are the least popular stopover locations for London Heathrow Airport to San Francisco flights?

  • 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 £443). 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
Pacific Grove

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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 8 January 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 8 January 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£236Average£563FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£334Average£478FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£350Average£524FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Aer LingusCheapest£351Average£554FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£353Average£540FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
SWISSCheapest£356Average£405FlexibilityNo cancel feeOn-time79%
Search SWISS flights
TAP AIR PORTUGALCheapest£357Average£456FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£374Average£514FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£374Average£482FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£378Average£464FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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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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