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

Our cheapest airline available from San Francisco to London is Scandinavian Airlines. Our recent data shows that you can find tickets from as low as £476 on this airline. Additional options worth looking into are TAP AIR PORTUGAL and American Airlines, starting at £477 and £483 round-trip. Scandinavian Airlines is currently priced 17% below the average price you’ll pay for this route.

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

For one-way options, check prices for JetBlue. According to our data, you can fly for as low as £295. Users have also found prices from £296 and £298 on Air Canada and Virgin Atlantic, respectively.

What are the most popular routes from San Francisco to London?

While some choose either San Francisco - London Gatwick or San Francisco - London City, San Francisco - London Heathrow is the most popular route from San Francisco to London.

What are the cheapest flights from San Francisco to London?

Looking at all options, your cheapest flight can be booked for £285. While the most popular route (San Francisco - London Heathrow) can be booked for £391 on average our data indicates £1,989 when flying from San Francisco to London.

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

Before booking your flight to London from San Francisco, check out the most reliable airlines to get you to your destination on time: Air Canada (84%), Austrian Airlines (84%), SWISS( 84%).

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

Before booking your flight from San Francisco to London check out the most popular airlines for this route: Air Canada, British Airways or Iberia.

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

Friday flights are generally found to be more expensive for flights from San Francisco to London. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

How far in advance should I book a flight from San Francisco to London?

Find a great deal and save up to 20% by booking at least 39 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from San Francisco to London within the next two weeks, with the cheapest ticket starting at £517.

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

Flights from San Francisco to London lean towards being more expensive in June. Prices are generally better when you fly from San Francisco to London in October, with the cheapest ticket starting at £390.

What airport do you fly from for flights from San Francisco to London?

Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to London from San Francisco. Booking flights from San Francisco (SFO) to London should be relatively easy as there are 37 daily outbound flights to London from 8 different airlines.

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

Yes. In addition to deals on San Francisco to London flights, Cheapflights offers holiday packages that include both flights and hotel.

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

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to London.

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

Yes. Cheapflights offers flight deals from San Francisco to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£295+ Flights from San Francisco to London

Cheapflights Tip: The best prices from San Francisco to London are usually found in October or September, booked 38 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from San Francisco to London

Round-trip from	£476
One-way from	£295
Popular in	June
Cheapest in	October
Average price	£506
Good round-trip deal	£503 or less
Good one-way deal	£325 or less

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

Search Deals

JetBlue
15/10
1 total stop
14h 35m total
San Francisco to London

Search Deals

Highest demand for flights based on searches. 19% potential increase in price (£101 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£17 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 (LON).

Search Deals

Price to beat on a one-way flight from San Francisco to London (LON).

Search Deals

Find flight deals from San Francisco to London

Cheapest flights from San Francisco to London
Explore the most affordable flight options available from San Francisco to London. 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£476

Sun 4/511:25SFO - LHR

1 stop14h 35mAir Canada

Tue 20/508:45LHR - SFO

2 stops19h 25mAir Canada

Deal found 28/4£477

Tue 30/916:20SFO - LGW

1 stop33h 20mTAP AIR PORTUGAL

Sun 12/1012:05LGW - SFO

2 stops34h 25mTAP AIR PORTUGAL

Deal found 28/4£477

Sun 4/516:05SFO - LHR

Nonstop10h 20mVirgin Atlantic

Tue 20/506:30LHR - SFO

1 stop13h 15mVirgin Atlantic

Deal found 28/4£477

Tue 29/407:00SFO - LHR

2 stops20h 50mMultiple Airlines

Tue 6/506:00LHR - SFO

1 stop18h 10mMultiple Airlines

Deal found 28/4£483

Mon 20/1019:20SFO - LHR

Nonstop10h 25mAmerican Airlines

Fri 31/1007:50LHR - SFO

1 stop15h 40mAmerican Airlines

Deal found 28/4£483

Tue 29/709:35SFO - LGW

1 stop16h 25mVirgin Atlantic

Fri 22/812:00LGW - SFO

1 stop21h 25mVirgin Atlantic

Deal found 28/4£484

Tue 2/916:35SFO - LHR

Nonstop10h 25mBritish Airways

Wed 10/914:15LHR - SFO

Nonstop11h 10mBritish Airways

Deal found 28/4£484

Sun 17/821:30SFO - LGW

2 stops28h 30mDelta

Wed 27/812:00LGW - SFO

2 stops29h 06mDelta

Deal found 28/4£487

Wed 20/812:16SFO - LHR

1 stop14h 34mIberia

Tue 26/810:45LHR - SFO

Nonstop11h 05mIberia

Deal found 28/4£487

Thu 16/1016:20SFO - LHR

1 stop18h 30mTAP AIR PORTUGAL

Fri 31/1006:00LHR - SFO

1 stop16h 45mTAP AIR PORTUGAL

Deal found 28/4£489

Mon 28/422:30SFO - LCY

2 stops51h 35mITA Airways

Fri 2/508:30LCY - SFO

1 stop36h 45mITA Airways

Deal found 28/4£490

Best flights from San Francisco to London
Discover carefully curated flight deals from San Francisco to London 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£476

Tue 30/916:20SFO - LGW

1 stop33h 20mTAP AIR PORTUGAL

Sun 12/1012:05LGW - SFO

2 stops34h 25mTAP AIR PORTUGAL

Deal found 28/4£477

Mon 20/1019:20SFO - LHR

Nonstop10h 25mAmerican Airlines

Fri 31/1007:50LHR - SFO

1 stop15h 40mAmerican Airlines

Deal found 28/4£483

Tue 29/709:35SFO - LGW

1 stop16h 25mVirgin Atlantic

Fri 22/812:00LGW - SFO

1 stop21h 25mVirgin Atlantic

Deal found 28/4£484

Wed 3/916:35SFO - LHR

1 stop12h 45mMultiple Airlines

Wed 15/1010:30LHR - SFO

2 stops19h 10mMultiple Airlines

Deal found 29/4£485

Sun 17/821:30SFO - LGW

2 stops28h 30mDelta

Wed 27/812:00LGW - SFO

2 stops29h 06mDelta

Deal found 28/4£487

Wed 20/812:16SFO - LHR

1 stop14h 34mIberia

Tue 26/810:45LHR - SFO

Nonstop11h 05mIberia

Deal found 28/4£487

Tue 2/919:55SFO - LHR

Nonstop10h 15mUnited Airlines

Tue 16/908:45LHR - SFO

1 stop15h 25mUnited Airlines

Deal found 28/4£490

Sun 20/708:20SFO - LHR

1 stop14h 10mAir Canada

Tue 19/817:40LHR - SFO

2 stops27h 55mAir Canada

Deal found 29/4£500

Sun 17/819:30SFO - LGW

1 stop14h 20mSWISS

Wed 27/818:35LGW - SFO

1 stop29h 35mSWISS

Deal found 28/4£502

Wed 23/715:15SFO - LCY

1 stop17h 00mITA Airways

Wed 27/816:50LCY - SFO

1 stop28h 25mITA Airways

Deal found 28/4£509

Mon 15/916:35SFO - LHR

Nonstop10h 25mBritish Airways

Wed 15/1010:45LHR - SFO

Nonstop11h 05mBritish Airways

Deal found 29/4£510

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

Tue 2/916:35SFO - LHR

Nonstop10h 25mBritish Airways

Wed 10/914:15LHR - SFO

Nonstop11h 10mBritish Airways

Deal found 28/4£484

Wed 3/921:20SFO - LHR

Nonstop10h 20mVirgin Atlantic

Wed 17/916:25LHR - SFO

Nonstop11h 05mVirgin Atlantic

Deal found 28/4£504

Tue 23/921:20SFO - LHR

Nonstop10h 20mDelta

Fri 3/1011:15LHR - SFO

Nonstop11h 00mDelta

Deal found 28/4£504

Mon 1/919:20SFO - LHR

Nonstop10h 25mIberia

Mon 15/910:45LHR - SFO

Nonstop11h 05mIberia

Deal found 29/4£506

Wed 14/512:55SFO - LHR

Nonstop10h 30mUnited Airlines

Tue 3/616:15LHR - SFO

Nonstop10h 55mUnited Airlines

Deal found 28/4£557

Tue 13/519:30SFO - LHR

Nonstop10h 25mFinnair

Mon 26/510:45LHR - SFO

Nonstop11h 05mFinnair

Deal found 28/4£572

Tue 8/719:50SFO - LHR

Nonstop10h 20mLufthansa

Tue 5/816:15LHR - SFO

Nonstop10h 55mLufthansa

Deal found 28/4£614

Sun 1/613:00SFO - LHR

Nonstop10h 25mBrussels Airlines

Tue 17/612:20LHR - SFO

Nonstop11h 00mBrussels Airlines

Deal found 28/4£674

Mon 12/519:40SFO - LHR

Nonstop10h 30mAustrian Airlines

Thu 19/610:35LHR - SFO

Nonstop11h 00mAustrian Airlines

Deal found 28/4£680

Sun 11/519:30SFO - LHR

Nonstop10h 25mAlaska Airlines

Mon 16/610:45LHR - SFO

Nonstop11h 05mAlaska Airlines

Deal found 28/4£752

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

Mon 28/422:30SFO - LCY

2 stops51h 35mITA Airways

Fri 2/508:30LCY - SFO

1 stop36h 45mITA Airways

Deal found 28/4£490

Mon 28/423:55SFO - LHR

1 stop23h 20mDelta

Wed 7/506:30LHR - SFO

1 stop13h 15mDelta

Deal found 28/4£498

Tue 29/408:20SFO - LHR

1 stop17h 40mMultiple Airlines

Tue 6/508:45LHR - SFO

1 stop15h 25mMultiple Airlines

Deal found 28/4£480

Tue 29/419:30SFO - LCY

1 stop15h 15mMultiple Airlines

Tue 6/509:25LCY - SFO

2 stops18h 45mMultiple Airlines

Deal found 28/4£510

Thu 1/519:30SFO - LHR

1 stop14h 20mSWISS

Thu 8/508:40LHR - SFO

1 stop15h 30mSWISS

Deal found 28/4£497

Sun 4/511:25SFO - LHR

1 stop14h 35mAir Canada

Tue 20/508:45LHR - SFO

2 stops19h 25mAir Canada

Deal found 28/4£477

Sun 4/516:05SFO - LHR

Nonstop10h 20mVirgin Atlantic

Tue 20/506:30LHR - SFO

1 stop13h 15mVirgin Atlantic

Deal found 28/4£477

Sun 4/519:30SFO - LGW

1 stop14h 20mSWISS

Tue 20/518:35LGW - SFO

1 stop29h 35mSWISS

Deal found 28/4£502

Sun 4/519:30SFO - LCY

1 stop33h 00mSWISS

Tue 20/519:20LCY - SFO

1 stop28h 50mSWISS

Deal found 28/4£506

Sun 4/518:20SFO - LHR

2 stops16h 30mScandinavian Airlines

Tue 20/507:05LHR - SFO

2 stops17h 25mScandinavian Airlines

Deal found 28/4£507

Sun 4/522:30SFO - LCY

2 stops27h 35mITA Airways

Tue 20/508:30LCY - SFO

2 stops41h 18mITA Airways

Deal found 28/4£517

Sun 4/519:30SFO - LGW

1 stop14h 20mSWISS

Tue 20/518:35LGW - SFO

1 stop29h 35mSWISS

Deal found 29/4£502

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

Wed 15/1011:00SFO - LGW

1 stop14h 35mJetBlue

Deal found 27/4£295

Thu 18/922:30SFO - LHR

1 stop14h 15mJetBlue

Deal found 28/4£295

Wed 4/606:00SFO - LGW

3 stops19h 25mMultiple Airlines

Deal found 28/4£296

Sun 11/520:00SFO - STN

1 stop30h 40mMultiple Airlines

Deal found 29/4£296

Sun 4/511:25SFO - LHR

1 stop14h 35mAir Canada

Deal found 28/4£296

Sun 4/523:50SFO - LHR

3 stops36h 30mMultiple Airlines

Deal found 27/4£296

Wed 4/610:15SFO - LTN

3 stops52h 05mMultiple Airlines

Deal found 28/4£296

Mon 12/516:05SFO - LHR

Nonstop10h 20mVirgin Atlantic

Deal found 28/4£298

Mon 5/517:45SFO - LHR

1 stop14h 10mAer Lingus

Deal found 28/4£299

Sun 18/520:00SFO - LGW

1 stop28h 30mVueling

Deal found 28/4£301

Tue 29/716:35SFO - LHR

Nonstop10h 25mBritish Airways

Deal found 29/4£301

Tue 8/711:00SFO - SEN

3 stops28h 05mMultiple Airlines

Deal found 28/4£304

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to London 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

£476

San FranciscoLondon

SFO - LGW

SFOLGW

San Francisco

Tue 30/9

16:20-09:40

1 stop33h 20m

London Gatwick

Sun 12/10

12:05-14:30

2 stops34h 25m

£477

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 2/9

18:45-22:00

2 stops19h 15m

London Heathrow

Tue 14/10

19:50-14:35

1 stop26h 45m

£482

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 20/10

19:20-13:45

Nonstop10h 25m

London Heathrow

Fri 31/10

07:50-16:30

1 stop15h 40m

£483

San FranciscoLondon

SFO - LGW

SFOLGW

San Francisco

Tue 29/7

09:35-10:00

1 stop16h 25m

London Gatwick

Fri 22/8

12:00-01:25

1 stop21h 25m

£484

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 2/9

16:35-11:00

Nonstop10h 25m

London Heathrow

Wed 10/9

14:15-17:25

Nonstop11h 10m

£484

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

£485

San FranciscoLondon

SFO - LGW

SFOLGW

San Francisco

Sun 17/8

21:30-10:00

2 stops28h 30m

London Gatwick

Wed 27/8

12:00-09:06

2 stops29h 06m

£487

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 20/8

14:21-12:30

1 stop14h 09m

London Heathrow

Fri 5/9

10:45-13:50

Nonstop11h 05m

£487

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

£490

Flights are sorted by cheapest return flights first.

Deals found on 27/4

Showing 1-10 of 60 results

...

Best time to book a flight from San Francisco to London

Have a flexible travel schedule? Discover the best time to fly to London 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

How far ahead should I book a flight from San Francisco to London?

The price you pay for your flight from San Francisco to London may vary depending on when you book. For the best chance of a lower fare, look to book 38 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 San Francisco to London?

Currently, January is the cheapest month in which you can book a flight from San Francisco to London (average of £112). Flying from San Francisco to London 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 LON?

When flying from San Francisco to London, 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?

Travellers seeking maximum savings on their San Francisco to London 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

The most flights from SFO to LON are scheduled on a Monday (37 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (37 on average).

Rainfall in London by month

In terms of precipitation, rainfall in London 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 when rainfall is around 40.0 mm.

Temperature in London by month

If weather is an important factor for your trip to London, 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 London

Read reviews from past customers who have flown Delta, KLM and Finnair from San Francisco to London. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,929 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

7,929 reviews

Delta

8.0

Very Good

7,929 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

7,929 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

7,929 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

7,929 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

7,929 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?
Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to London from San Francisco. Booking flights from San Francisco (SFO) to London should be relatively easy as there are 37 daily outbound flights to London from 8 different airlines.
What are the cheapest airlines flying from San Francisco to London round-trip?
Our cheapest airline available from San Francisco to London is Scandinavian Airlines. Our recent data shows that you can find tickets from as low as £476 on this airline. Additional options worth looking into are TAP AIR PORTUGAL and American Airlines, starting at £477 and £483 round-trip. Scandinavian Airlines is currently priced 17% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from San Francisco to London one-way?
For one-way options, check prices for JetBlue. According to our data, you can fly for as low as £295. Users have also found prices from £296 and £298 on Air Canada and Virgin Atlantic, respectively.
What are the most popular routes from San Francisco to London?
While some choose either San Francisco - London Gatwick or San Francisco - London City, San Francisco - London Heathrow is the most popular route from San Francisco to London.
What are the most reliable airlines from San Francisco to London?
Before booking your flight to London from San Francisco, check out the most reliable airlines to get you to your destination on time: Air Canada (84%), Austrian Airlines (84%), SWISS( 84%).
What are the cheapest flights from San Francisco to London?
Looking at all options, your cheapest flight can be booked for £285. While the most popular route (San Francisco - London Heathrow) can be booked for £391 on average our data indicates £1,989 when flying from San Francisco to London.
Can I find deals for flights from San Francisco to London that include hotel bookings?
Yes. In addition to deals on San Francisco to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from San Francisco to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to London.
Can I find deals for business class flights from San Francisco to London?
Yes. Cheapflights offers flight deals from San Francisco to London 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?
Currently, January is the cheapest month in which you can book a flight from San Francisco to London (average of £112). Flying from San Francisco to London 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

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Luton

Slough

Croydon

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Ilford

Hayes

Southend-on-Sea

Crawley

Wembley

Ipswich

Maidstone

Winchester

Folkestone

Dartford

Watford

Chichester

Browse thousands of different options on Cheapflights for your next trip

Top 8 airlines flying from San Francisco to London

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest£393	Average£408	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Virgin Atlantic	Cheapest£424	Average£590	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Iberia	Cheapest£430	Average£533	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£433	Average£534	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air Canada	Cheapest£437	Average£614	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
KLM	Cheapest£444	Average£509	FlexibilityNo cancel fee	On-time75%	Search KLM flights
United Airlines	Cheapest£459	Average£680	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Lufthansa	Cheapest£484	Average£695	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights

Fly with Cheapflights

How does Cheapflights help users find flights from San Francisco to London?

When you search for this flight from San Francisco to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

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 London from San Francisco.

Can Cheapflights find flights from San Francisco to London with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from San Francisco to London flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from San Francisco to London become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from San Francisco to London from £295

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 15/10. 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 are usually found in October or September, booked 38 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from San Francisco to London

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 London

Cheapest flights from San Francisco to LondonExplore the most affordable flight options available from San Francisco to London. 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 London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

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

Best time to book a flight from San Francisco to London

Have a flexible travel schedule? Discover the best time to fly to London from San Francisco with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to London

How far ahead should I book a flight from San Francisco to London?

Use this chart to determine the optimal time to book a return flight from San Francisco to London. Price data was last updated on 25 April 2025.

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

What is the cheapest time of day to fly from SFO to LON?

Find hourly flight availability from San Francisco to London. 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?

Use this chart to determine the cheapest time to fly return from San Francisco to London. Price data was last updated on 16 December 2024.

Weekly flight availability from San Francisco to London

Explore weekly flight availability from San Francisco to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 29 April 2025.

Rainfall in London by month

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

Temperature in London by month

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

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 29 April 2025.

Read reviews from past customers who have flown Delta, KLM and Finnair from San Francisco to London. 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 London. 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?

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

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

What are the most popular routes from San Francisco to London?

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

What are the cheapest flights from San Francisco to London?

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

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

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

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

Travelling to a place near San Francisco?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Francisco to London

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

Top 8 airlines flying from San Francisco to London

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Cheapest flights from San Francisco to London
Explore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.