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

Our cheapest airline available from San Francisco to London is KLM. Our recent data shows that you can find tickets from as low as £361 on this airline. Additional options worth looking into are British Airways and TAP AIR PORTUGAL, starting at £383 and £387 round-trip. KLM is currently priced 35% 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 TAP AIR PORTUGAL. According to our data, you can fly for as low as £226. Users have also found prices from £227 and £228 on WestJet and Iberia, respectively.

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.

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).

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 £266. While the most popular route (San Francisco - London Heathrow) can be booked for £311 on average our data indicates £1,221 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: Aeromexico (90%), Iberia (88%), KLM( 88%).

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?

Wednesday 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 16% 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 £515.

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 £381.

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 42 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.

£226+ 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	£381
One-way from	£226
Popular in	June
Cheapest in	October
Average price	£530
Good round-trip deal	£382 or less
Good one-way deal	£283 or less

SWISS
7/9-15/9
2 total stops
49h 50m total
San Francisco to London

Search Deals

16/11
2 total stops
18h 35m total
San Francisco to London

Search Deals

Highest demand for flights based on searches. 16% potential increase in price (£79 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 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 15 August 2025.

Wed 8/1019:30SFO - LHR

1 stop14h 20mSWISS

Tue 28/1009:00LHR - SFO

1 stop15h 30mSWISS

Deal found 13/8£381

Sun 7/919:30SFO - LHR

1 stop15h 50mSWISS

Wed 24/908:40LHR - SFO

1 stop15h 30mSWISS

Deal found 12/8£381

Mon 20/1019:40SFO - LHR

2 stops17h 55mScandinavian Airlines

Mon 27/1019:30LHR - SFO

1 stop27h 40mScandinavian Airlines

Deal found 14/8£383

Sat 15/1116:40SFO - LHR

2 stops18h 10mScandinavian Airlines

Sun 15/321:05LHR - SFO

2 stops25h 30mScandinavian Airlines

Deal found 14/8£385

Wed 10/919:30SFO - LCY

1 stop29h 20mSWISS

Wed 17/918:05LCY - SFO

1 stop30h 05mSWISS

Deal found 12/8£386

Wed 1/1019:30SFO - LHR

1 stop15h 50mSWISS

Wed 15/1006:00LHR - SFO

1 stop18h 10mSWISS

Deal found 13/8£386

Wed 8/1019:40SFO - LHR

1 stop14h 50mScandinavian Airlines

Wed 22/1021:05LHR - SFO

2 stops27h 25mScandinavian Airlines

Deal found 14/8£386

Sat 18/1020:10SFO - LGW

1 stop18h 30mLEVEL

Wed 22/1016:30LGW - SFO

1 stop33h 40mLEVEL

Deal found 13/8£387

Wed 3/908:00SFO - LHR

1 stop14h 25mIberia

Wed 10/912:15LHR - SFO

1 stop16h 40mIberia

Deal found 12/8£387

Wed 10/919:30SFO - LHR

2 stops28h 45mSWISS

Wed 17/920:05LHR - SFO

1 stop28h 05mSWISS

Deal found 13/8£389

Sun 30/1116:40SFO - LHR

1 stop15h 20mScandinavian Airlines

Sat 6/1206:40LHR - SFO

1 stop15h 55mScandinavian Airlines

Deal found 14/8£390

Sat 11/1019:40SFO - LHR

1 stop14h 00mScandinavian Airlines

Fri 17/1010:20LHR - SFO

1 stop14h 10mScandinavian Airlines

Deal found 14/8£391

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 15 August 2025.

Thu 23/1019:40SFO - LHR

2 stops29h 55mScandinavian Airlines

Mon 3/1106:40LHR - SFO

1 stop15h 55mScandinavian Airlines

Deal found 14/8£383

Sat 18/1020:10SFO - LGW

1 stop18h 30mLEVEL

Wed 22/1016:30LGW - SFO

1 stop33h 40mLEVEL

Deal found 13/8£387

Mon 20/1019:40SFO - STN

2 stops18h 30mMultiple Airlines

Wed 29/1014:45STN - SFO

2 stops35h 40mMultiple Airlines

Deal found 14/8£400

Wed 3/1216:35SFO - LGW

1 stop33h 15mTAP AIR PORTUGAL

Wed 10/1209:35LGW - SFO

2 stops62h 30mTAP AIR PORTUGAL

Deal found 13/8£413

Wed 12/1119:25SFO - LCY

1 stop13h 40mSWISS

Wed 19/1109:25LCY - SFO

1 stop15h 05mSWISS

Deal found 14/8£476

Mon 2/216:40SFO - LHR

2 stops15h 45mScandinavian Airlines

Thu 12/219:50LHR - SFO

2 stops26h 45mScandinavian Airlines

Deal found 14/8£386

Sun 28/920:10SFO - LGW

1 stop28h 20mLEVEL

Wed 1/1013:00LGW - SFO

1 stop37h 10mLEVEL

Deal found 13/8£394

Tue 30/908:30SFO - STN

2 stops20h 10mMultiple Airlines

Tue 7/1022:05STN - SFO

2 stops29h 46mMultiple Airlines

Deal found 14/8£402

Wed 26/1116:35SFO - LGW

1 stop33h 15mTAP AIR PORTUGAL

Sun 7/1221:25LGW - SFO

2 stops25h 10mTAP AIR PORTUGAL

Deal found 15/8£422

Thu 23/1019:40SFO - LHR

2 stops29h 55mScandinavian Airlines

Sat 1/1115:35LHR - SFO

2 stops31h 00mScandinavian Airlines

Deal found 14/8£386

Wed 10/917:40SFO - STN

1 stop14h 40mMultiple Airlines

Wed 17/909:05STN - SFO

1 stop14h 50mMultiple Airlines

Deal found 12/8£404

Mon 10/1116:35SFO - LGW

1 stop15h 10mTAP AIR PORTUGAL

Mon 17/1121:35LGW - SFO

2 stops48h 55mTAP AIR PORTUGAL

Deal found 14/8£423

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 15 August 2025.

Wed 15/1016:30SFO - LHR

Nonstop10h 25mBritish Airways

Mon 20/1010:45LHR - SFO

Nonstop11h 05mBritish Airways

Deal found 13/8£399

Sun 30/1117:30SFO - LHR

Nonstop10h 30mBritish Airways

Mon 8/1211:45LHR - SFO

Nonstop11h 15mBritish Airways

Deal found 12/8£400

Tue 30/916:30SFO - LHR

Nonstop10h 25mBritish Airways

Sun 7/1211:45LHR - SFO

Nonstop11h 15mBritish Airways

Deal found 13/8£400

Mon 22/916:30SFO - LHR

Nonstop10h 25mBritish Airways

Mon 29/910:45LHR - SFO

Nonstop11h 05mBritish Airways

Deal found 12/8£404

Sat 8/1117:30SFO - LHR

Nonstop10h 30mBritish Airways

Tue 18/1111:45LHR - SFO

Nonstop11h 15mBritish Airways

Deal found 13/8£420

Tue 16/919:20SFO - LHR

Nonstop10h 25mBritish Airways

Mon 6/1014:15LHR - SFO

Nonstop11h 10mBritish Airways

Deal found 13/8£423

Sat 22/1117:30SFO - LHR

Nonstop10h 30mBritish Airways

Fri 5/1211:45LHR - SFO

Nonstop11h 15mBritish Airways

Deal found 13/8£425

Sat 11/1016:30SFO - LHR

Nonstop10h 25mBritish Airways

Mon 20/1014:15LHR - SFO

Nonstop11h 10mBritish Airways

Deal found 13/8£434

Thu 9/1019:20SFO - LHR

Nonstop10h 25mBritish Airways

Mon 13/1010:45LHR - SFO

Nonstop11h 05mBritish Airways

Deal found 13/8£435

Thu 23/1016:30SFO - LHR

Nonstop10h 25mBritish Airways

Mon 3/1115:25LHR - SFO

Nonstop11h 20mBritish Airways

Deal found 12/8£436

Thu 25/916:30SFO - LHR

Nonstop10h 25mBritish Airways

Mon 29/910:45LHR - SFO

Nonstop11h 05mBritish Airways

Deal found 12/8£440

Mon 15/1220:40SFO - LHR

Nonstop10h 30mBritish Airways

Mon 22/1211:45LHR - SFO

Nonstop11h 15mBritish Airways

Deal found 13/8£445

Last-minute flights from San Francisco to London
Discover last-minute flight deals from San Francisco to London. Data last updated 15 August 2025 and is based on user searches.

Tue 19/813:45SFO - LCY

1 stop21h 55mVirgin Atlantic

Tue 26/820:10LCY - SFO

1 stop23h 35mVirgin Atlantic

Deal found 12/8£417

Tue 19/819:50SFO - LHR

Nonstop10h 20mSWISS

Sat 6/920:05LHR - SFO

1 stop28h 05mSWISS

Deal found 12/8£419

Tue 19/811:02SFO - LHR

1 stop13h 58mBritish Airways

Sat 6/916:55LHR - SFO

1 stop14h 21mBritish Airways

Deal found 12/8£424

Tue 19/817:40SFO - LHR

1 stop13h 15mAer Lingus

Tue 26/807:40LHR - SFO

1 stop16h 15mAer Lingus

Deal found 12/8£441

Tue 19/811:40SFO - LHR

1 stop14h 20mMultiple Airlines

Fri 16/109:00LHR - SFO

1 stop15h 30mMultiple Airlines

Deal found 14/8£443

Tue 19/817:40SFO - LHR

1 stop13h 15mAer Lingus

Wed 27/807:40LHR - SFO

1 stop16h 15mAer Lingus

Deal found 12/8£447

Wed 20/819:50SFO - LHR

Nonstop10h 20mUnited Airlines

Sat 6/908:45LHR - SFO

1 stop15h 25mUnited Airlines

Deal found 11/8£403

Wed 20/816:05SFO - LHR

Nonstop10h 20mDelta

Mon 8/911:15LHR - SFO

Nonstop11h 00mDelta

Deal found 12/8£417

Wed 20/805:50SFO - LGW

2 stops20h 10mVirgin Atlantic

Thu 28/812:00LGW - SFO

1 stop19h 47mVirgin Atlantic

Deal found 14/8£452

Thu 21/806:15SFO - LGW

2 stops19h 45mDelta

Fri 29/812:00LGW - SFO

2 stops30h 13mDelta

Deal found 14/8£474

Fri 22/816:05SFO - LHR

Nonstop10h 20mDelta

Fri 29/806:30LHR - SFO

1 stop13h 15mDelta

Deal found 12/8£412

Sat 23/819:50SFO - LHR

Nonstop10h 20mSWISS

Mon 1/918:40LHR - SFO

1 stop29h 30mSWISS

Deal found 12/8£414

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 15 August 2025.

Sun 16/1110:15SFO - LHR

2 stops18h 35mMultiple Airlines

Deal found 14/8£226

Mon 6/1016:20SFO - LTN

2 stops23h 00mMultiple Airlines

Deal found 12/8£226

Sat 6/905:50SFO - LGW

1 stop21h 00mMultiple Airlines

Deal found 13/8£226

Wed 17/916:20SFO - LHR

1 stop15h 15mTAP AIR PORTUGAL

Deal found 14/8£226

Thu 16/1012:50SFO - LTN

2 stops19h 45mMultiple Airlines

Deal found 13/8£226

Wed 19/1116:35SFO - LGW

2 stops22h 55mMultiple Airlines

Deal found 14/8£227

Mon 6/1016:20SFO - STN

2 stops36h 20mMultiple Airlines

Deal found 13/8£227

Sun 5/1012:50SFO - LHR

1 stop15h 15mWestJet

Deal found 14/8£227

Thu 9/1010:15SFO - LTN

3 stops22h 20mMultiple Airlines

Deal found 13/8£227

Sat 18/1020:10SFO - LGW

1 stop18h 30mIberia

Deal found 12/8£228

Wed 17/911:12SFO - SEN

2 stops25h 38mMultiple Airlines

Deal found 13/8£228

Mon 26/109:10SFO - LHR

2 stops19h 40mMultiple Airlines

Deal found 14/8£228

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Thu 23/10

19:40-09:35

2 stops29h 55m

London Heathrow

Mon 3/11

06:40-14:35

1 stop15h 55m

£383

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 2/2

16:40-16:25

2 stops15h 45m

London Heathrow

Thu 12/2

19:50-14:35

2 stops26h 45m

£386

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Thu 23/10

19:40-09:35

2 stops29h 55m

London Heathrow

Sat 1/11

15:35-15:35

2 stops31h 00m

£386

San FranciscoLondon

SFO - LGW

SFOLGW

San Francisco

Sat 18/10

20:10-22:40

1 stop18h 30m

London Gatwick

Wed 22/10

16:30-18:10

1 stop33h 40m

£387

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 2/2

16:40-16:00

1 stop15h 20m

London Heathrow

Sun 15/2

19:30-14:35

1 stop27h 05m

£390

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Thu 5/2

16:40-16:00

1 stop15h 20m

London Heathrow

Fri 13/2

06:40-14:35

1 stop15h 55m

£390

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Thu 5/2

16:40-16:00

1 stop15h 20m

London Heathrow

Wed 11/2

19:30-14:35

1 stop27h 05m

£390

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sat 31/1

16:40-16:00

1 stop15h 20m

London Heathrow

Mon 9/2

06:40-14:35

1 stop15h 55m

£390

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Fri 30/1

16:40-16:00

1 stop15h 20m

London Heathrow

Fri 13/2

06:40-14:35

1 stop15h 55m

£390

San FranciscoLondon

SFO - LGW

SFOLGW

San Francisco

Sun 28/9

20:10-08:30

1 stop28h 20m

London Gatwick

Wed 1/10

13:00-18:10

1 stop37h 10m

£394

Flights are sorted by cheapest return flights first.

Deals found on 12/8

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 evening, which can drop the price by up to 33% 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 (42 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (42 on average).

What’s the top stopover airport for flights from San Francisco to London?

Copenhagen (CPH) – chosen by Cheapflights users on 40% of one-stop itineraries from San Francisco to London on Cheapflights.

What’s the cheapest stopover airport for flights from San Francisco to London?

Copenhagen (CPH) is the most affordable one-stop option, with an average return flight price of £403.

What’s the fastest stopover option from San Francisco to London?

Flights via Salt Lake City (SLC) have the shortest average one-way travel time for one-stop routes: 12h 32m.

Which airport typically offers the quickest stopover for flights from San Francisco to London?

Flights via New York (JFK) offer the fastest connection on this route, with an average stopover time of 1h 19m.

Reviews of airlines servicing London

Read through reviews of airlines operating flights from San Francisco to London, such as United Airlines, Virgin Atlantic, andIberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,915 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

United Airlines

7.4

Good

8,915 reviews

United Airlines

7.4

Good

8,915 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Virgin Atlantic

7.4

Good

657 reviews

United Airlines

7.4

Good

8,915 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Iberia

7.0

Good

2,882 reviews

United Airlines

7.4

Good

8,915 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Lufthansa

6.8

Okay

7,321 reviews

United Airlines

7.4

Good

8,915 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

British Airways

6.7

Okay

7,267 reviews

United Airlines

7.4

Good

8,915 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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 42 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 KLM. Our recent data shows that you can find tickets from as low as £361 on this airline. Additional options worth looking into are British Airways and TAP AIR PORTUGAL, starting at £383 and £387 round-trip. KLM is currently priced 35% 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 TAP AIR PORTUGAL. According to our data, you can fly for as low as £226. Users have also found prices from £227 and £228 on WestJet and Iberia, 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: Aeromexico (90%), Iberia (88%), KLM( 88%).
What are the cheapest flights from San Francisco to London?
Looking at all options, your cheapest flight can be booked for £266. While the most popular route (San Francisco - London Heathrow) can be booked for £311 on average our data indicates £1,221 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

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Hounslow

Gatwick

Slough

Deal

Luton

Wembley

Crawley

Ilford

Hayes

Ipswich

Southend-on-Sea

Winchester

Folkestone

Eastbourne

Maidstone

Watford

Chichester

Dartford

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
KLM	Cheapest£361	Average£458	FlexibilityNo cancel fee	On-time75%	Search KLM flights
British Airways	Cheapest£383	Average£519	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
TAP AIR PORTUGAL	Cheapest£387	Average£403	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
United Airlines	Cheapest£392	Average£595	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Atlantic	Cheapest£393	Average£522	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Iberia	Cheapest£423	Average£526	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Lufthansa	Cheapest£426	Average£690	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Air Canada	Cheapest£430	Average£605	FlexibilityNo cancel fee	On-time67%	Search Air Canada 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.

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Cheap flights from San Francisco to London from £226

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 16/11. 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

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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 15 August 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 15 August 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 8 August 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 15 August 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 15 August 2025.

What’s the top stopover airport for flights from San Francisco to London?

Share of one-stop return flights from San Francisco to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

What’s the cheapest stopover airport for flights from San Francisco to London?

Average return fare for one-stop flights from San Francisco to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

What’s the fastest stopover option from San Francisco to London?

Shortest average travel time for one-stop one-way flights from San Francisco to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Which airport typically offers the quickest stopover for flights from San Francisco to London?

Average stopover duration for one-stop one-way flights from San Francisco to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing London

Read through reviews of airlines operating flights from San Francisco to London, such as United Airlines, Virgin Atlantic, andIberia. Reviews also offer insight into each airline's 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?

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

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

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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 15 August 2025.