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Cheap flights from San Francisco to London Heathrow Airport from £290

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 20/3. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LHR
1 Jan — 8 Jan1
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 2 December 2025.

Round-trip from

£446

One-way from

£290

Popular in

June

Cheapest in

October

Average price

£713

Good round-trip deal

£492 or less

Good one-way deal

£290 or less
United Airlines
  • United Airlines
  • 19/1-29/1
  • Nonstop
  • 21h 50m total
  • San Francisco to London
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Scandinavian Airlines
  • Scandinavian Airlines
  • 20/3
  • 1 total stop
  • 32h 40m total
  • San Francisco to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£94 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
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Average for round-trip flights in December 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 2 December 2025.

Mon 8/1216:15SFO - LHR
1 stop13h 15mUnited Airlines
Tue 23/1215:20LHR - SFO
1 stop14h 22mUnited Airlines
Deal found 1/12£446
Wed 3/1208:25SFO - LHR
1 stop14h 15mMultiple Airlines
Tue 16/1209:00LHR - SFO
1 stop15h 30mMultiple Airlines
Deal found 1/12£447
Tue 30/1217:30SFO - LHR
Nonstop10h 30mBritish Airways
Mon 26/111:45LHR - SFO
Nonstop11h 15mBritish Airways
Deal found 1/12£449
Fri 5/1212:50SFO - LHR
Nonstop10h 35mMultiple Airlines
Sun 7/1206:00LHR - SFO
1 stop18h 30mMultiple Airlines
Deal found 1/12£450
Mon 1/1219:25SFO - LHR
1 stop14h 25mSWISS
Tue 9/1209:00LHR - SFO
1 stop15h 30mSWISS
Deal found 1/12£450
Mon 8/1208:15SFO - LHR
1 stop14h 10mDelta
Thu 25/1208:55LHR - SFO
1 stop23h 02mDelta
Deal found 28/11£451
Mon 1/1221:40SFO - LHR
1 stop17h 15mLufthansa
Thu 11/1207:40LHR - SFO
1 stop19h 55mLufthansa
Deal found 30/11£452
Sun 7/1207:00SFO - LHR
1 stop15h 50mIberia
Tue 23/1212:35LHR - SFO
1 stop15h 43mIberia
Deal found 30/11£453
Tue 30/1216:10SFO - LHR
1 stop13h 20mMultiple Airlines
Mon 26/107:00LHR - SFO
2 stops17h 30mMultiple Airlines
Deal found 30/11£454
Sun 7/1216:30SFO - LHR
Nonstop10h 10mDelta
Thu 15/106:30LHR - SFO
1 stop13h 20mDelta
Deal found 28/11£454
Fri 5/1208:25SFO - LHR
1 stop14h 15mMultiple Airlines
Tue 9/1209:00LHR - SFO
1 stop15h 30mMultiple Airlines
Deal found 30/11£455
Wed 3/1217:25SFO - LHR
Nonstop10h 35mUnited Airlines
Thu 11/1206:35LHR - SFO
1 stop21h 00mUnited Airlines
Deal found 30/11£456

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 2 December 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

Thu 15/1

12:50-07:25

Nonstop10h 35m

London Heathrow

Tue 3/2

09:00-16:30

1 stop15h 30m

£452

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 9/3

07:25-09:20

2 stops18h 55m

London Heathrow

Sun 22/3

19:50-15:35

2 stops26h 45m

£456

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 21/1

16:30-10:40

Nonstop10h 10m

London Heathrow

Sun 1/2

06:30-11:50

1 stop13h 20m

£463

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 3/3

17:25-12:00

Nonstop10h 35m

London Heathrow

Sun 8/3

11:10-20:35

1 stop16h 25m

£463

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 14/1

00:40-07:05

1 stop22h 25m

London Heathrow

Tue 3/2

06:30-11:50

1 stop13h 20m

£464

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Thu 9/4

07:25-09:20

2 stops17h 55m

London Heathrow

Mon 20/4

19:30-14:40

1 stop27h 10m

£465

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 18/1

16:30-10:40

Nonstop10h 10m

London Heathrow

Sun 25/1

11:40-14:40

Nonstop11h 00m

£465

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 28/4

07:00-09:20

2 stops18h 20m

London Heathrow

Wed 3/6

19:30-14:40

1 stop27h 10m

£465

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 11/5

07:00-09:20

2 stops18h 20m

London Heathrow

Thu 21/5

06:40-14:40

1 stop16h 00m

£465

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Thu 15/1

10:35-10:30

1 stop15h 55m

London Heathrow

Tue 20/1

06:30-11:50

1 stop13h 20m

£466

Flights are sorted by cheapest return flights first.

Deals found on 30/11

Showing 1-10 of 21 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 28 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 £376). Flying from San Francisco to London Heathrow Airport in June is currently the most expensive (average of £610). 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 2 December 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 29 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 2 December 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
675 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.2

Entertainment

7.5

Food

6.9

Overall

7.5

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
675 reviews
Virgin Atlantic
7.5
Good
675 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.2

Entertainment

7.5

Food

6.9

Overall

7.5

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
9,065 reviews
Virgin Atlantic
7.5
Good
675 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.2

Entertainment

7.5

Food

6.9

Overall

7.5

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
3,038 reviews
Virgin Atlantic
7.5
Good
675 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.2

Entertainment

7.5

Food

6.9

Overall

7.5

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
7,602 reviews
Virgin Atlantic
7.5
Good
675 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.2

Entertainment

7.5

Food

6.9

Overall

7.5

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
7,549 reviews
Virgin Atlantic
7.5
Good
675 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.2

Entertainment

7.5

Food

6.9

Overall

7.5

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 United Airlines, Scandinavian Airlines, and Delta 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 8h 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 £361, 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 £370 and £374, respectively. Users have found that Scandinavian Airlines is 37% cheaper than the other options available to this destination.

  • 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 £1,294 for a flight from San Francisco to London Heathrow Airport. The cheapest flight overall is £185 while the most popular route, (San Francisco - London Heathrow) is currently priced at £332.

  • 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 £376). Flying from San Francisco to London Heathrow Airport in June is currently the most expensive (average of £610). 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
Northampton
Hounslow
Slough
Gatwick
Luton
Ilford
Wembley
Colchester
Brentford
Watford
Hayes
Crawley
Deal
Winchester
Swindon
Romford
Bedford
Chichester

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 2 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£361Average£454FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
KLMCheapest£370Average£510FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£374Average£572FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£392Average£526FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£419Average£670FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£423Average£602FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£431Average£523FlexibilityNo 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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