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

Currently priced at £474, 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 Delta and Iberia - these airlines can fly you to your destination from £480 and £482, respectively. Users have found that Scandinavian Airlines is 18% 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 JetBlue, which is currently one of the cheapest options available, starting at £294. Air Canada flights start at £295 while deals on Aer Lingus start at £298 one-way.

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

On average you can expect to pay £1,981 for a flight from San Francisco to London Heathrow Airport. The cheapest flight overall is £284 while the most popular route, (San Francisco - London Heathrow) is currently priced at £389.

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

Consider Air Canada (84%), Austrian Airlines (84%) or SWISS (84%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to London Heathrow Airport.

What are the most popular airlines that fly from San Francisco to London Heathrow Airport?

The most popular airlines flying from San Francisco to London Heathrow Airport are Air Canada, British Airways and Iberia. Something to consider prior to booking your flight.

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

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 37% on your flight compared to booking on days when demand is much higher.

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

Our data shows that October tends to be the cheapest month to fly to London Heathrow Airport from San Francisco. Users have commonly found prices around £574 for the month, but tickets can be as low as £389. Due to multiple factors, prepare for potentially higher prices in June.

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 42 outbound flights to London Heathrow per day. 8 airlines have flights to London Heathrow from San Francisco on a regular basis.

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.

£294+ Flights from San Francisco to London Heathrow Airport

Cheapflights Tip: The best prices from San Francisco to London Heathrow are usually found in October or February, booked 26 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from San Francisco to Heathrow

Round-trip from	£474
One-way from	£294
Popular in	June
Cheapest in	October
Average price	£509
Good round-trip deal	£501 or less
Good one-way deal	£323 or less

Scandinavian Airlines
1/10-7/10
4 total stops
35h 20m total
San Francisco to London

Search Deals

JetBlue
18/9
1 total stop
14h 15m total
San Francisco to London

Search Deals

Highest demand for flights based on searches. 19% potential increase in price (£103 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£18 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from San Francisco to London Heathrow.

Search Deals

Price to beat on a one-way flight from San Francisco to London Heathrow.

Search Deals

Find flight deals from San Francisco to Heathrow

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 29 April 2025.

Wed 1/1019:40SFO - LHR

2 stops17h 55mScandinavian Airlines

Tue 7/1007:05LHR - SFO

2 stops17h 25mScandinavian Airlines

Deal found 28/4£474

Sun 4/511:25SFO - LHR

1 stop14h 35mAir Canada

Tue 20/508:45LHR - SFO

2 stops19h 25mAir Canada

Deal found 28/4£475

Sun 4/516:05SFO - LHR

Nonstop10h 20mVirgin Atlantic

Tue 20/506:30LHR - SFO

1 stop13h 15mVirgin Atlantic

Deal found 28/4£476

Wed 14/516:05SFO - LHR

Nonstop10h 20mDelta

Wed 28/516:25LHR - SFO

Nonstop11h 05mDelta

Deal found 29/4£480

Tue 2/919:20SFO - LHR

Nonstop10h 25mAmerican Airlines

Tue 7/1008:50LHR - SFO

1 stop15h 05mAmerican Airlines

Deal found 29/4£482

Wed 3/916:35SFO - LHR

1 stop12h 45mMultiple Airlines

Wed 15/1010:30LHR - SFO

2 stops19h 10mMultiple Airlines

Deal found 29/4£483

Wed 20/812:16SFO - LHR

1 stop14h 34mIberia

Tue 26/810:45LHR - SFO

Nonstop11h 05mIberia

Deal found 28/4£485

Wed 7/512:55SFO - LHR

Nonstop10h 30mUnited Airlines

Tue 13/508:45LHR - SFO

1 stop15h 40mUnited Airlines

Deal found 28/4£488

Mon 22/916:20SFO - LHR

1 stop22h 35mTAP AIR PORTUGAL

Thu 9/1006:00LHR - SFO

1 stop16h 30mTAP AIR PORTUGAL

Deal found 28/4£489

Mon 28/413:45SFO - LHR

1 stop16h 30mKLM

Wed 7/506:30LHR - SFO

1 stop13h 15mKLM

Deal found 28/4£496

Sat 10/519:40SFO - LHR

2 stops38h 10mSWISS

Tue 20/508:45LHR - SFO

1 stop15h 25mSWISS

Deal found 28/4£503

Mon 15/916:35SFO - LHR

Nonstop10h 25mBritish Airways

Wed 15/1010:45LHR - SFO

Nonstop11h 05mBritish Airways

Deal found 29/4£508

Best flights from San Francisco to Heathrow
Discover carefully curated flight deals from San Francisco to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 29 April 2025.

Wed 1/1019:40SFO - LHR

2 stops17h 55mScandinavian Airlines

Tue 7/1007:05LHR - SFO

2 stops17h 25mScandinavian Airlines

Deal found 28/4£474

Wed 14/516:05SFO - LHR

Nonstop10h 20mDelta

Tue 27/511:15LHR - SFO

Nonstop11h 00mDelta

Deal found 29/4£480

Tue 2/916:35SFO - LHR

Nonstop10h 25mIberia

Tue 14/1010:45LHR - SFO

Nonstop11h 05mIberia

Deal found 29/4£482

Wed 3/916:35SFO - LHR

1 stop12h 45mMultiple Airlines

Wed 15/1010:30LHR - SFO

2 stops19h 10mMultiple Airlines

Deal found 29/4£483

Wed 3/916:25SFO - LHR

1 stop14h 15mAmerican Airlines

Tue 30/907:40LHR - SFO

1 stop16h 15mAmerican Airlines

Deal found 29/4£486

Tue 2/919:55SFO - LHR

Nonstop10h 15mUnited Airlines

Tue 16/908:45LHR - SFO

1 stop15h 25mUnited Airlines

Deal found 28/4£488

Mon 22/916:20SFO - LHR

1 stop17h 25mTAP AIR PORTUGAL

Wed 8/1018:45LHR - SFO

1 stop27h 45mTAP AIR PORTUGAL

Deal found 28/4£489

Mon 18/812:15SFO - LHR

1 stop13h 20mAir Canada

Tue 23/908:45LHR - SFO

2 stops18h 53mAir Canada

Deal found 29/4£494

Sat 10/519:40SFO - LHR

2 stops38h 10mSWISS

Tue 20/508:45LHR - SFO

1 stop15h 25mSWISS

Deal found 28/4£503

Mon 15/916:35SFO - LHR

Nonstop10h 25mBritish Airways

Wed 15/1010:45LHR - SFO

Nonstop11h 05mBritish Airways

Deal found 29/4£508

Thu 31/721:05SFO - LHR

1 stop17h 35mLufthansa

Tue 19/807:25LHR - SFO

1 stop19h 35mLufthansa

Deal found 29/4£509

Tue 12/814:05SFO - LHR

1 stop32h 30mAustrian Airlines

Fri 29/814:05LHR - SFO

2 stops33h 33mAustrian Airlines

Deal found 27/4£512

Direct flights from San Francisco to Heathrow
Explore direct flight options from San Francisco to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 29 April 2025.

Wed 14/516:05SFO - LHR

Nonstop10h 20mDelta

Wed 28/516:25LHR - SFO

Nonstop11h 05mDelta

Deal found 29/4£480

Tue 2/916:35SFO - LHR

Nonstop10h 25mIberia

Tue 14/1010:45LHR - SFO

Nonstop11h 05mIberia

Deal found 29/4£482

Sun 17/819:20SFO - LHR

Nonstop10h 25mBritish Airways

Wed 27/814:15LHR - SFO

Nonstop11h 10mBritish Airways

Deal found 27/4£491

Wed 13/816:35SFO - LHR

Nonstop10h 25mFinnair

Sun 31/810:45LHR - SFO

Nonstop11h 05mFinnair

Deal found 29/4£497

Sat 10/516:05SFO - LHR

Nonstop10h 20mVirgin Atlantic

Sat 17/511:15LHR - SFO

Nonstop11h 00mVirgin Atlantic

Deal found 27/4£547

Tue 13/515:55SFO - LHR

Nonstop10h 30mUnited Airlines

Sun 25/510:35LHR - SFO

Nonstop11h 00mUnited Airlines

Deal found 28/4£573

Fri 25/716:00SFO - LHR

Nonstop10h 25mLufthansa

Fri 8/816:15LHR - SFO

Nonstop10h 55mLufthansa

Deal found 29/4£610

Sun 1/613:00SFO - LHR

Nonstop10h 25mBrussels Airlines

Tue 17/612:20LHR - SFO

Nonstop11h 00mBrussels Airlines

Deal found 28/4£672

Mon 12/519:40SFO - LHR

Nonstop10h 30mAustrian Airlines

Thu 19/610:35LHR - SFO

Nonstop11h 00mAustrian Airlines

Deal found 28/4£678

Last-minute flights from San Francisco to Heathrow
Discover last-minute flight deals from San Francisco to Heathrow. Data last updated 29 April 2025 and is based on user searches.

Tue 29/408:20SFO - LHR

1 stop17h 40mMultiple Airlines

Tue 6/508:45LHR - SFO

1 stop15h 25mMultiple Airlines

Deal found 28/4£479

Wed 30/410:19SFO - LHR

1 stop14h 41mIberia

Sat 10/510:45LHR - SFO

Nonstop11h 05mIberia

Deal found 29/4£498

Wed 30/421:05SFO - LHR

1 stop14h 35mLufthansa

Mon 5/520:25LHR - SFO

1 stop30h 35mLufthansa

Deal found 28/4£516

Thu 1/519:30SFO - LHR

1 stop14h 20mSWISS

Thu 8/508:40LHR - SFO

1 stop15h 30mSWISS

Deal found 28/4£495

Sat 3/517:45SFO - LHR

1 stop13h 10mAer Lingus

Mon 5/507:40LHR - SFO

1 stop16h 15mAer Lingus

Deal found 29/4£490

Sun 4/511:25SFO - LHR

1 stop14h 35mAir Canada

Tue 20/508:45LHR - SFO

2 stops19h 25mAir Canada

Deal found 28/4£475

Sun 4/516:05SFO - LHR

Nonstop10h 20mVirgin Atlantic

Tue 20/506:30LHR - SFO

1 stop13h 15mVirgin Atlantic

Deal found 28/4£476

Sun 4/518:20SFO - LHR

2 stops16h 30mScandinavian Airlines

Tue 20/507:05LHR - SFO

2 stops17h 25mScandinavian Airlines

Deal found 28/4£506

Sun 4/521:05SFO - LHR

1 stop15h 40mLufthansa

Mon 12/520:25LHR - SFO

1 stop30h 35mLufthansa

Deal found 29/4£516

Sun 4/516:20SFO - LHR

Nonstop10h 35mBritish Airways

Tue 20/514:15LHR - SFO

Nonstop11h 00mBritish Airways

Deal found 28/4£542

Mon 5/519:30SFO - LHR

Nonstop10h 25mFinnair

Tue 20/514:15LHR - SFO

Nonstop11h 00mFinnair

Deal found 29/4£502

Mon 5/514:15SFO - LHR

1 stop13h 35mAustrian Airlines

Mon 12/515:05LHR - SFO

2 stops35h 55mAustrian Airlines

Deal found 29/4£517

One-way flights from San Francisco to Heathrow
Search for one-way flight options from San Francisco to Heathrow. Find affordable one-way fares based on user searches. Data last updated 29 April 2025.

Thu 18/922:30SFO - LHR

1 stop14h 15mJetBlue

Deal found 28/4£294

Sun 4/511:25SFO - LHR

1 stop14h 35mAir Canada

Deal found 28/4£295

Sun 4/523:50SFO - LHR

3 stops36h 30mMultiple Airlines

Deal found 27/4£295

Mon 5/517:45SFO - LHR

1 stop14h 10mAer Lingus

Deal found 29/4£298

Mon 12/521:20SFO - LHR

Nonstop10h 20mVirgin Atlantic

Deal found 28/4£298

Tue 29/716:35SFO - LHR

Nonstop10h 25mBritish Airways

Deal found 29/4£300

Sun 4/516:05SFO - LHR

Nonstop10h 20mDelta

Deal found 28/4£301

Sat 26/700:30SFO - LHR

1 stop23h 10mUnited Airlines

Deal found 28/4£305

Sat 16/822:46SFO - LHR

1 stop14h 54mAmerican Airlines

Deal found 29/4£306

Sat 10/514:15SFO - LHR

1 stop34h 20mAustrian Airlines

Deal found 28/4£307

Thu 8/519:30SFO - LHR

Nonstop10h 25mIberia

Deal found 29/4£308

Wed 9/716:20SFO - LHR

1 stop15h 15mTAP AIR PORTUGAL

Deal found 29/4£313

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 1/10

19:40-21:35

2 stops17h 55m

London Heathrow

Tue 7/10

07:05-16:30

2 stops17h 25m

£474

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 14/5

16:05-10:25

Nonstop10h 20m

London Heathrow

Tue 27/5

11:15-14:15

Nonstop11h 00m

£480

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 2/9

16:35-11:00

Nonstop10h 25m

London Heathrow

Tue 14/10

10:45-13:50

Nonstop11h 05m

£482

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 3/9

16:35-13:20

1 stop12h 45m

London Heathrow

Wed 15/10

10:30-21:40

2 stops19h 10m

£483

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 3/9

16:25-14:40

1 stop14h 15m

London Heathrow

Tue 30/9

07:40-15:55

1 stop16h 15m

£486

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 2/9

19:55-14:10

Nonstop10h 15m

London Heathrow

Tue 16/9

08:45-16:10

1 stop15h 25m

£488

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 22/9

16:20-17:45

1 stop17h 25m

London Heathrow

Wed 8/10

18:45-14:30

1 stop27h 45m

£489

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 18/8

12:15-09:35

1 stop13h 20m

London Heathrow

Tue 23/9

08:45-19:38

2 stops18h 53m

£494

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sat 10/5

19:40-17:50

2 stops38h 10m

London Heathrow

Tue 20/5

08:45-16:10

1 stop15h 25m

£503

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 15/9

16:35-11:00

Nonstop10h 25m

London Heathrow

Wed 15/10

10:45-13:50

Nonstop11h 05m

£508

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 36 results

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?

Booking 26 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, January is the cheapest month in which you can book a flight from San Francisco to London Heathrow Airport (average of £112). Flying from San Francisco to London Heathrow Airport in August is currently the most expensive (average of £164). 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?

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 afternoon, which can drop the price by up to 27% versus a flight at midday.

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

Travellers seeking maximum savings on their San Francisco to London Heathrow Airport flight should consider departing on Wednesday evenings 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.

Weekly flight availability from San Francisco to London Heathrow Airport

The most flights from SFO to LHR are scheduled on a Monday (42 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (42 on average).

Rainfall in Heathrow by month

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Heathrow

To help decide which airline to fly from San Francisco to London, see what other customers have to say about Delta, KLM and Finnair. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,936 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

7,936 reviews

Delta

8.0

Very Good

7,936 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,333 reviews

Delta

8.0

Very Good

7,936 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,273 reviews

Delta

8.0

Very Good

7,936 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines

7.6

Good

780 reviews

Delta

8.0

Very Good

7,936 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS

7.5

Good

1,588 reviews

Delta

8.0

Very Good

7,936 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

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 42 outbound flights to London Heathrow per day. 8 airlines have flights to London Heathrow from San Francisco on a regular basis.
What are the cheapest airlines flying from San Francisco to London Heathrow Airport round-trip?
Currently priced at £474, 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 Delta and Iberia - these airlines can fly you to your destination from £480 and £482, respectively. Users have found that Scandinavian Airlines is 18% 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 JetBlue, which is currently one of the cheapest options available, starting at £294. Air Canada flights start at £295 while deals on Aer Lingus start at £298 one-way.
What are the most reliable airlines from San Francisco to London Heathrow Airport?
Consider Air Canada (84%), Austrian Airlines (84%) or SWISS (84%) 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 £1,981 for a flight from San Francisco to London Heathrow Airport. The cheapest flight overall is £284 while the most popular route, (San Francisco - London Heathrow) is currently priced at £389.
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, January is the cheapest month in which you can book a flight from San Francisco to London Heathrow Airport (average of £112). Flying from San Francisco to London Heathrow Airport in August is currently the most expensive (average of £164). 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

Deal

Hounslow

Milton Keynes

Gatwick

Luton

Slough

Croydon

Eastbourne

Northampton

Ilford

Hayes

Southend-on-Sea

Crawley

Wembley

Ipswich

Maidstone

Winchester

Swindon

Folkestone

Dartford

Browse thousands of different options on Cheapflights for your next trip

Top 8 airlines flying from San Francisco to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest£391	Average£407	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Virgin Atlantic	Cheapest£423	Average£588	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Iberia	Cheapest£428	Average£532	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£431	Average£532	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air Canada	Cheapest£435	Average£612	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
KLM	Cheapest£443	Average£507	FlexibilityNo cancel fee	On-time75%	Search KLM flights
United Airlines	Cheapest£458	Average£678	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Lufthansa	Cheapest£482	Average£693	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights

Fly with Cheapflights

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from San Francisco to London Heathrow Airport from £294

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 18/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from San Francisco to London Heathrow are usually found in October or February, booked 26 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from San Francisco to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from San Francisco to Heathrow

Cheapest flights from San Francisco to HeathrowExplore 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 29 April 2025.

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 29 April 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to London Heathrow Airport that are best for you.

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.

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 25 April 2025.

What is the cheapest month to book a flight from San Francisco to London Heathrow Airport?

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 29 April 2025.

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 30 March 2025.

Weekly flight availability from San Francisco to London Heathrow Airport

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

Reviews of airlines servicing Heathrow

To help decide which airline to fly from San Francisco to London, see what other customers have to say about Delta, KLM and Finnair. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

What are the cheapest airlines to fly from San Francisco to London Heathrow Airport one-way?

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

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

Can I find deals for flights from San Francisco to Heathrow that include hotel bookings?

How can I find direct flights from San Francisco to Heathrow?

Can I find deals for business class flights from San Francisco to Heathrow?

What is the cheapest month to book a flight from San Francisco to London Heathrow Airport?

Travelling to a place near San Francisco?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Francisco to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Top 8 airlines flying from San Francisco to Heathrow

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?

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

Can Cheapflights 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?

100% Free

Book with Flexibility

Travel Smart

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 29 April 2025.