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Cheap flights from San Francisco to London Heathrow Airport from £277

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 18/1. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LHR
18 Dec — 25 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from San Francisco to London Heathrow are usually found in October or February, booked 63 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Cheap 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 18 November 2025.

Round-trip from

£447

One-way from

£277

Popular in

June

Cheapest in

October

Average price

£528

Good round-trip deal

£486 or less

Good one-way deal

£298 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 15/4-30/4
  • 4 total stops
  • 49h 25m total
  • San Francisco to London
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Brussels Airlines
  • Brussels Airlines
  • 18/1
  • 1 total stop
  • 20h 05m total
  • San Francisco to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£95 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from San Francisco to London Heathrow.
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Price to beat on a one-way flight from San Francisco to London Heathrow.
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Find 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 18 November 2025.

Sun 23/1118:00SFO - LHR
1 stop33h 50mMultiple Airlines
Tue 2/1213:45LHR - SFO
1 stop34h 45mMultiple Airlines
Deal found 17/11£447
Wed 19/1108:30SFO - LHR
1 stop13h 25mMultiple Airlines
Wed 3/1207:40LHR - SFO
1 stop15h 10mMultiple Airlines
Deal found 17/11£447
Thu 4/1216:40SFO - LHR
1 stop21h 00mScandinavian Airlines
Sat 13/1206:40LHR - SFO
1 stop15h 55mScandinavian Airlines
Deal found 17/11£448
Sun 7/1216:30SFO - LHR
Nonstop10h 10mDelta
Fri 9/109:40LHR - SFO
1 stop20h 02mDelta
Deal found 16/11£449
Wed 3/1217:30SFO - LHR
Nonstop10h 30mBritish Airways
Thu 11/1212:35LHR - SFO
1 stop15h 55mBritish Airways
Deal found 16/11£450
Mon 1/1216:40SFO - LHR
2 stops19h 15mScandinavian Airlines
Wed 10/1221:05LHR - SFO
2 stops25h 30mScandinavian Airlines
Deal found 16/11£451
Sun 14/1208:25SFO - LHR
1 stop14h 15mMultiple Airlines
Thu 25/1211:10LHR - SFO
1 stop16h 25mMultiple Airlines
Deal found 17/11£453
Mon 17/1112:50SFO - LHR
Nonstop10h 35mBrussels Airlines
Tue 25/1113:45LHR - SFO
Nonstop11h 15mBrussels Airlines
Deal found 16/11£454
Mon 24/1112:50SFO - LHR
Nonstop10h 35mBrussels Airlines
Tue 2/1211:05LHR - SFO
2 stops42h 44mBrussels Airlines
Deal found 16/11£454
Thu 27/1116:40SFO - LHR
1 stop15h 20mScandinavian Airlines
Thu 4/1217:00LHR - SFO
1 stop29h 35mScandinavian Airlines
Deal found 17/11£455

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 18 November 2025.
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

Tue 17/2

13:41-10:00

1 stop12h 19m

London Heathrow

Tue 3/3

06:30-11:50

1 stop13h 20m

£447

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 13/1

16:30-10:40

Nonstop10h 10m

London Heathrow

Tue 27/1

11:40-14:40

Nonstop11h 00m

£447

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 7/1

20:40-15:10

Nonstop10h 30m

London Heathrow

Tue 20/1

11:45-15:00

Nonstop11h 15m

£447

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 7/1

13:20-10:00

1 stop12h 40m

London Heathrow

Tue 27/1

11:40-14:40

Nonstop11h 00m

£451

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 7/1

14:05-11:40

1 stop13h 35m

London Heathrow

Thu 22/1

11:40-14:40

Nonstop11h 00m

£451

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 6/1

13:20-10:00

1 stop12h 40m

London Heathrow

Thu 15/1

11:40-14:40

Nonstop11h 00m

£451

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 21/1

13:35-17:40

2 stops20h 05m

London Heathrow

Mon 2/2

10:20-23:16

2 stops20h 56m

£455

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 25/3

13:00-21:40

2 stops25h 40m

London Heathrow

Tue 31/3

06:40-14:40

1 stop16h 00m

£463

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Thu 19/2

17:25-12:00

Nonstop10h 35m

London Heathrow

Mon 23/2

11:10-19:35

1 stop16h 25m

£464

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 16/2

17:25-12:00

Nonstop10h 35m

London Heathrow

Mon 23/2

07:40-14:50

1 stop15h 10m

£464

Flights are sorted by cheapest return flights first.

Deals found on 16/11

Showing 1-10 of 22 results
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2
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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 14 November 2025.

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 £378). Flying from San Francisco to London Heathrow Airport in June is currently the most expensive (average of £612). 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 18 November 2025.

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 evening, which can drop the price by up to 31% versus a flight at midday.

What is the cheapest day to fly from San Francisco to London Heathrow Airport?

Use this chart to determine the cheapest time to fly return from San Francisco to Heathrow. Price data was last updated on 2 November 2025.

Travellers seeking maximum savings on their San Francisco to London Heathrow Airport flight should consider departing on Sunday at midday when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 18 November 2025.
See what other customers who have flown with Virgin Atlantic, United Airlines, andIberia 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.
Virgin Atlantic
7.5
Good
673 reviews
Check prices

Overall

7.5

Entertainment

7.5

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
673 reviews
Virgin Atlantic
7.5
Good
673 reviews
Check prices

Overall

7.5

Entertainment

7.5

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
United Airlines
7.4
Good
9,015 reviews
Virgin Atlantic
7.5
Good
673 reviews
Check prices

Overall

7.5

Entertainment

7.5

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Iberia
7.0
Good
3,020 reviews
Virgin Atlantic
7.5
Good
673 reviews
Check prices

Overall

7.5

Entertainment

7.5

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Lufthansa
6.8
Okay
7,576 reviews
Virgin Atlantic
7.5
Good
673 reviews
Check prices

Overall

7.5

Entertainment

7.5

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
British Airways
6.7
Okay
7,528 reviews
Virgin Atlantic
7.5
Good
673 reviews
Check prices

Overall

7.5

Entertainment

7.5

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.9

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from 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. 7 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 KLM, Delta, and British Airways fly from San Francisco to London Heathrow Airport in about 10h 10m. The time it takes to get you to your destination can typically vary by up to 2h 09m. 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 £362, Scandinavian Airlines will fly you from San Francisco to London Heathrow Airport and back. In addition to Scandinavian Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from KLM and Virgin Atlantic - these airlines can fly you to your destination from £372 and £376, respectively. Users have found that Scandinavian Airlines is 37% 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 SWISS, which is currently one of the cheapest options available, starting at £280. United Airlines flights start at £292 while deals on Lufthansa start at £292 one-way.

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

    Consider American Airlines (87%), Aer Lingus (87%) or Alaska Airlines (87%) 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 £1,483 for a flight from San Francisco to London Heathrow Airport. The cheapest flight overall is £281 while the most popular route, (San Francisco - London Heathrow) is currently priced at £330.

  • 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 £378). Flying from San Francisco to London Heathrow Airport in June is currently the most expensive (average of £612). 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
Slough
Gatwick
Hounslow
Northampton
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
Swindon
Crawley
Brentford
Romford
Chichester
Ipswich

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Francisco to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from San Francisco to Heathrow

Discover the top 7 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 18 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£362Average£456FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
KLMCheapest£372Average£482FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£376Average£573FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£394Average£532FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£421Average£670FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£425Average£631FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£434Average£547FlexibilityNo 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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