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

SWISS, at $519, was found to be the cheapest airline from London to San Francisco.Alternate airlines to your destination round-trip include Lufthansa and British Airways. You may be able to fly from London to San Francisco for 23% less than the average price by searching for these airlines.

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

The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $511. However, be on the lookout for offers from Aer Lingus and WestJet, as they are both options that can get you from London to San Francisco for a low price.

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

Travelers seeking maximum savings on their London to San Francisco flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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

When deciding which route to take from London to San Francisco consider London Heathrow - San Francisco, London Gatwick - San Francisco or London City - San Francisco as they are the most popular.

What are the cheapest flights from London to San Francisco?

While on average a flight from London to San Francisco is generally $1,955, our data shows the cheapest flight currently is $543. When looking at the most popular route, (London Heathrow - San Francisco), you can expect to pay $435 for that flight.

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

No one likes to see their flight delayed. When booking a flight from London to San Francisco consider choosing Air Canada (93%), Austrian Airlines (93%) or United Airlines (93%) as they are the most reliable in getting you off to your destination on time.

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

Consider American Airlines, Finnair or British Airways when booking your flight. These represent the most popular airlines when flying from London to San Francisco.

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

Saturday flights are found to be more expensive to fly from London to San Francisco. 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 San Francisco.

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

To save on the cost of your flight from London to San Francisco, book at least 61 days before your planned departure. Booking around this time can save you about 15% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $620 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $715.

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

February can be a great time to fly to San Francisco from London with a flight ticket averaging about $681. Cheapflights users have found deals in the month of February for as cheap as $463. The most expensive prices can be found in the month of July.

Most accurate provider : When it comes to deals on London-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-San Francisco flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on London-San Francisco flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to San Francisco from London. Booking flights from London to San Francisco (SFO) should be relatively easy as there are 36 daily inbound flights from London from 12 different airlines.

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

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

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

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

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

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

$511+ Flights from London to San Francisco

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Find cheap flights from London to San Francisco with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from London to San Francisco are usually found in February or November, booked 88 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from London to San Francisco

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$519 (Kiwi.com)
One-way from	$511 (FlightHub)
Popular in	July
Cheapest in	February
Average price	$645
Good round-trip deal	$612 or less
Good one-way deal	$625 or less

Provider with most accurate pricing for London (LON)-San Francisco flight deals.

Search Deals

Provider most trusted by Cheapflights users for London (LON)-San Francisco flights.

Search Deals

From London (LON) to San Francisco

Search Deals

One-way flight from London (LON) to San Francisco

Search Deals

Highest demand for flights based on searches. 18% potential increase in price ($155 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($21 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from London (LON) to San Francisco.

Search Deals

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

Search Deals

Find flight deals from London to San Francisco

Cheapest flights from London to San Francisco
Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

Tue 5/66:35 pmLGW - SFO

1 stop29h 35mSWISS

Sun 5/117:30 pmSFO - LGW

1 stop14h 20mSWISS

Deal found 4/9

$519

Thu 5/16:30 amLHR - SFO

1 stop14h 10mLufthansa

Tue 5/2012:55 pmSFO - LHR

Nonstop10h 30mLufthansa

Deal found 4/9

$521

Fri 5/169:25 amLCY - SFO

1 stop14h 45mSWISS

Mon 5/197:30 pmSFO - LCY

1 stop29h 20mSWISS

Deal found 4/11

$521

Tue 4/225:10 pmLHR - SFO

1 stop31h 00mMultiple Airlines

Tue 4/296:30 amSFO - LHR

2 stops26h 35mMultiple Airlines

Deal found 4/10

$522

Thu 5/17:40 amLHR - SFO

1 stop16h 15mBritish Airways

Sat 5/107:30 pmSFO - LHR

Nonstop10h 25mBritish Airways

Deal found 4/11

$525

Wed 9/103:05 pmLGW - SFO

1 stop16h 52mBritish Airways

Wed 9/177:20 amSFO - LGW

1 stop16h 50mBritish Airways

Deal found 4/10

$527

Thu 5/18:40 amLHR - SFO

1 stop15h 30mUnited Airlines

Sun 5/1112:55 pmSFO - LHR

Nonstop10h 30mUnited Airlines

Deal found 4/10

$528

Fri 5/163:05 pmLGW - SFO

1 stop26h 20mFinnair

Mon 5/1912:24 amSFO - LGW

2 stops24h 11mFinnair

Deal found 4/10

$529

Wed 10/84:25 pmLGW - SFO

1 stop30h 05mTAP AIR PORTUGAL

Wed 10/154:20 pmSFO - LGW

1 stop33h 25mTAP AIR PORTUGAL

Deal found 4/10

$531

Sat 4/196:30 amLHR - SFO

1 stop13h 15mKLM

Fri 5/29:20 pmSFO - LHR

Nonstop10h 20mKLM

Deal found 4/10

$532

Fri 5/28:40 amLHR - SFO

2 stops19h 30mAir Canada

Sun 5/118:35 amSFO - LHR

2 stops17h 25mAir Canada

Deal found 4/11

$540

Fri 9/56:10 amLHR - SFO

2 stops23h 19mFinnair

Sat 9/207:41 amSFO - LHR

2 stops15h 14mFinnair

Deal found 4/10

$549

Best flights from London to San Francisco
Discover carefully curated flight deals from London to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 11, 2025.

Tue 5/66:35 pmLGW - SFO

1 stop29h 35mSWISS

Sun 5/117:30 pmSFO - LGW

1 stop14h 20mSWISS

Deal found 4/9

$519

Thu 5/16:30 amLHR - SFO

1 stop14h 10mLufthansa

Tue 5/2012:55 pmSFO - LHR

Nonstop10h 30mLufthansa

Deal found 4/9

$521

Tue 4/225:10 pmLHR - SFO

1 stop31h 00mMultiple Airlines

Tue 4/296:30 amSFO - LHR

2 stops26h 35mMultiple Airlines

Deal found 4/10

$522

Thu 5/17:40 amLHR - SFO

1 stop16h 15mBritish Airways

Sat 5/107:30 pmSFO - LHR

Nonstop10h 25mBritish Airways

Deal found 4/11

$525

Thu 5/18:40 amLHR - SFO

1 stop15h 30mUnited Airlines

Sun 5/1112:55 pmSFO - LHR

Nonstop10h 30mUnited Airlines

Deal found 4/10

$528

Fri 5/163:05 pmLGW - SFO

1 stop26h 20mFinnair

Mon 5/1912:24 amSFO - LGW

2 stops24h 11mFinnair

Deal found 4/10

$529

Wed 10/84:25 pmLGW - SFO

1 stop30h 05mTAP AIR PORTUGAL

Wed 10/154:20 pmSFO - LGW

1 stop33h 25mTAP AIR PORTUGAL

Deal found 4/10

$531

Thu 5/18:40 amLHR - SFO

2 stops19h 15mAir Canada

Sun 5/119:50 amSFO - LHR

2 stops16h 10mAir Canada

Deal found 4/10

$534

Tue 4/2211:15 amLHR - SFO

Nonstop11h 00mAir France

Tue 4/299:20 pmSFO - LHR

Nonstop10h 20mAir France

Deal found 4/10

$542

Fri 5/211:15 amLHR - SFO

Nonstop11h 00mVirgin Atlantic

Sat 5/109:20 pmSFO - LHR

Nonstop10h 20mVirgin Atlantic

Deal found 4/11

$545

Tue 10/710:20 amLHR - SFO

1 stop14h 10mScandinavian Airlines

Wed 10/157:40 pmSFO - LHR

1 stop14h 00mScandinavian Airlines

Deal found 4/10

$559

Fri 5/910:35 amLHR - SFO

Nonstop11h 05mAustrian Airlines

Sun 5/1112:55 pmSFO - LHR

Nonstop10h 30mAustrian Airlines

Deal found 4/9

$562

Last-minute flights from London to San Francisco
Discover last-minute flight deals from London to San Francisco. Data last updated April 11, 2025 and is based on user searches.

Wed 4/1611:05 amLHR - SFO

2 stops21h 20mUnited Airlines

Thu 7/31:00 pmSFO - LHR

Nonstop10h 25mUnited Airlines

Deal found 4/10

$541

Thu 4/174:25 pmLHR - SFO

1 stop16h 05mFinnair

Thu 5/1511:26 amSFO - LHR

1 stop14h 39mFinnair

Deal found 4/10

$570

Thu 4/172:20 pmLHR - SFO

1 stop14h 54mBritish Airways

Mon 4/2111:59 pmSFO - LHR

1 stop22h 26mBritish Airways

Deal found 4/10

$572

Fri 4/188:05 pmLHR - SFO

1 stop28h 05mSWISS

Sun 5/412:55 pmSFO - LHR

Nonstop10h 30mSWISS

Deal found 4/10

$575

Sat 4/196:30 amLHR - SFO

1 stop14h 10mLufthansa

Fri 5/27:40 pmSFO - LHR

Nonstop10h 30mLufthansa

Deal found 4/10

$528

Sat 4/198:05 pmLHR - SFO

1 stop28h 05mMultiple Airlines

Fri 5/22:15 pmSFO - LHR

1 stop13h 35mMultiple Airlines

Deal found 4/10

$529

Sat 4/196:30 amLHR - SFO

1 stop13h 15mKLM

Fri 5/29:20 pmSFO - LHR

Nonstop10h 20mKLM

Deal found 4/10

$532

Sat 4/1910:35 amLHR - SFO

Nonstop11h 05mAustrian Airlines

Fri 5/212:55 pmSFO - LHR

Nonstop10h 30mAustrian Airlines

Deal found 4/10

$562

Sat 4/1912:20 pmLHR - SFO

Nonstop11h 05mAir Canada

Fri 5/23:55 pmSFO - LHR

Nonstop10h 30mAir Canada

Deal found 4/10

$567

Mon 4/216:35 pmLGW - SFO

1 stop29h 35mSWISS

Mon 5/57:30 pmSFO - LGW

1 stop14h 20mSWISS

Deal found 4/10

$580

Mon 4/211:05 pmLCY - SFO

1 stop35h 05mSWISS

Mon 5/57:30 pmSFO - LCY

1 stop15h 15mSWISS

Deal found 4/10

$583

Mon 4/218:10 pmLCY - SFO

1 stop23h 35mVirgin Atlantic

Mon 5/57:20 amSFO - LCY

2 stops17h 30mVirgin Atlantic

Deal found 4/10

$611

One-way flights from London to San Francisco
Search for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated April 11, 2025.

Fri 5/238:00 amLHR - SFO

1 stop16h 50mTAP AIR PORTUGAL

Deal found 4/11

$511

Mon 4/218:50 amLHR - SFO

2 stops22h 58mAer Lingus

Deal found 4/10

$512

Fri 6/206:00 amLGW - SFO

3 stops38h 05mMultiple Airlines

Deal found 4/11

$513

Fri 5/302:10 pmLHR - SFO

1 stop15h 15mWestJet

Deal found 4/10

$514

Sat 4/269:20 pmSTN - SFO

3 stops55h 17mMultiple Airlines

Deal found 4/11

$514

Tue 4/222:10 pmLHR - SFO

3 stops27h 20mMultiple Airlines

Deal found 4/10

$515

Mon 9/1510:45 amLGW - SFO

3 stops35h 12mWestJet

Deal found 4/11

$517

Sun 6/110:35 amLGW - SFO

1 stop35h 55mTAP AIR PORTUGAL

Deal found 4/10

$518

Tue 6/176:05 amLTN - SFO

1 stop15h 45mMultiple Airlines

Deal found 4/10

$520

Thu 5/298:45 amLCY - SFO

2 stops16h 30mMultiple Airlines

Deal found 4/10

$527

Thu 4/249:25 amLCY - SFO

1 stop14h 45mSWISS

Deal found 4/9

$549

Thu 5/18:45 amLCY - SFO

1 stop15h 20mLufthansa

Deal found 4/10

$555

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Tue 5/6

6:35 pm-4:10 pm

1 stop29h 35m

San Francisco

Sun 5/11

7:30 pm-5:50 pm

1 stop14h 20m

$519

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 5/1

6:30 am-12:40 pm

1 stop14h 10m

San Francisco

Tue 5/20

12:55 pm-7:25 am

Nonstop10h 30m

$521

LondonSan Francisco

LCY - SFO

LCYSFO

London City

Fri 5/16

9:25 am-4:10 pm

1 stop14h 45m

San Francisco

Mon 5/19

7:30 pm-8:50 am

1 stop29h 20m

$521

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 4/22

5:10 pm-4:10 pm

1 stop31h 00m

San Francisco

Tue 4/29

6:30 am-5:05 pm

2 stops26h 35m

$522

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 5/1

7:40 am-3:55 pm

1 stop16h 15m

San Francisco

Sat 5/10

7:30 pm-1:55 pm

Nonstop10h 25m

$525

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Wed 9/10

3:05 pm-11:57 pm

1 stop16h 52m

San Francisco

Wed 9/17

7:20 am-8:10 am

1 stop16h 50m

$527

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 5/1

8:40 am-4:10 pm

1 stop15h 30m

San Francisco

Sun 5/11

12:55 pm-7:25 am

Nonstop10h 30m

$528

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Fri 5/16

3:05 pm-9:25 am

1 stop26h 20m

San Francisco

Mon 5/19

12:24 am-8:35 am

2 stops24h 11m

$529

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Wed 10/8

4:25 pm-2:30 pm

1 stop30h 05m

San Francisco

Wed 10/15

4:20 pm-9:45 am

1 stop33h 25m

$531

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 5/1

8:40 am-7:55 pm

2 stops19h 15m

San Francisco

Sun 5/11

8:35 am-10:00 am

2 stops17h 25m

$534

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/11

Showing 1-10 of 60 results

...

Compare providers for flights from London to San Francisco

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to San Francisco in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*1 star
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Thrive Travel	Price Accuracy3 stars	Trust Score*2 stars
ScholarTrip	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on London-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-San Francisco flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on London-San Francisco flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for London to San Francisco flights

Cheapflights partnered with top experts to bring you the best recommendations for your London to San Francisco trip

Airlines

British Airways

BA's Club Suite offers private pods with a door, ideal for long-haul comfort.

BA's World Traveller Plus offers extra seat width and legroom, perfect for long-haul flights.

Read more about British Airwaysby Gabriel Leigh

United Airlines

United's Polaris Business Class features lie-flat seats and Saks Fifth Avenue bedding for ultimate comfort.

United's Premium Plus offers upgraded comfort with bigger seats and extra legroom on international flights.

Read more about United Airlinesby Harriet Baskas

Lufthansa

Lufthansa's Allegris cabins offer advanced comfort features, enhancing long-haul travel experience.

Lufthansa's Sleeper's Row allows spreading out across seats for added comfort on long flights.

Read more about Lufthansaby Blane Bachelor

Virgin Atlantic

Virgin's Upper Class offers lie-flat beds and a four-course meal for a luxurious experience.

Virgin's Economy Delight provides extra legroom and priority boarding, enhancing comfort and convenience.

Read more about Virgin Atlanticby Blane Bachelor

Airports

LHR

Heathrow's strict security means long lines. Ensure liquids are in one bag and remove suspicious items to avoid delays.

SFO

Use BART for a cost-effective 40-minute trip from SFO to downtown San Francisco. Purchase a Clipper Card for easy fare payment.

Our travel experts

Gabriel Leigh

Expert on British Airways

Harriet Baskas

Expert on United Airlines and SFO

Blane Bachelor

Expert on Lufthansa and Virgin Atlantic

Ramsey Qubein

Expert on LHR

Best time to book a flight from London to San Francisco

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

Estimated round-trip 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 London to San Francisco

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

The price you pay for your flight from London to San Francisco may vary depending on when you book. For the best chance of a lower fare, look to book 88 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 London to San Francisco?

Currently, January is the cheapest month in which you can book a flight from London to San Francisco (average of $276). Flying from London to San Francisco in June is currently the most expensive (average of $393). 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 LON to SFO?

It’s optimal to fly from London to San Francisco in the evening. By choosing this option you can save up to 6% on the cost of your flight, compared to a flight at noon.

Weekly flight availability from London to San Francisco

The most flights from LON to SFO are scheduled on a Monday (37 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (31 on average).

Rainfall in San Francisco by month

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

Temperature in San Francisco by month

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Francisco

See what other customers who have flown with Delta, Air New Zealand and KLM from London to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,912 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very good

7,912 reviews

Delta

8.0

Very good

7,912 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air New Zealand

8.0

Very good

463 reviews

Delta

8.0

Very good

7,912 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,321 reviews

Delta

8.0

Very good

7,912 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air Transat

7.8

Good

385 reviews

Delta

8.0

Very good

7,912 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,269 reviews

Delta

8.0

Very good

7,912 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What airport do you fly into for flights to San Francisco from London?
Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to San Francisco from London. Booking flights from London to San Francisco (SFO) should be relatively easy as there are 36 daily inbound flights from London from 12 different airlines.
What are the cheapest airlines flying from London to San Francisco round-trip?
SWISS, at $519, was found to be the cheapest airline from London to San Francisco.Alternate airlines to your destination round-trip include Lufthansa and British Airways. You may be able to fly from London to San Francisco for 23% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from London to San Francisco one-way?
The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $511. However, be on the lookout for offers from Aer Lingus and WestJet, as they are both options that can get you from London to San Francisco for a low price.
What are the most popular routes from London to San Francisco?
When deciding which route to take from London to San Francisco consider London Heathrow - San Francisco, London Gatwick - San Francisco or London City - San Francisco as they are the most popular.
What are the most reliable airlines from London to San Francisco?
No one likes to see their flight delayed. When booking a flight from London to San Francisco consider choosing Air Canada (93%), Austrian Airlines (93%) or United Airlines (93%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from London to San Francisco?
While on average a flight from London to San Francisco is generally $1,955, our data shows the cheapest flight currently is $543. When looking at the most popular route, (London Heathrow - San Francisco), you can expect to pay $435 for that flight.
Can I find deals for flights from London to San Francisco that include hotel bookings?
Yes. In addition to deals on London to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from London to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to San Francisco.
Can I find deals for business class flights from London to San Francisco?
Yes. Cheapflights offers flight deals from London to San Francisco 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 London to San Francisco?
Currently, January is the cheapest month in which you can book a flight from London to San Francisco (average of $276). Flying from London to San Francisco in June is currently the most expensive (average of $393). 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

Roseville

Mountain View

Santa Cruz

Turlock

South San Francisco

Fairfield

Manteca

Sausalito

Richmond

Watsonville

Hollister

Milpitas

Antioch

Hayward

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Newark

Alameda

Sunnyvale

Campbell

Daly City

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Top 10 airlines flying from London to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
Finnair	Cheapest$382	Average$581	FlexibilityNo cancel fee	On-time76%
British Airways	Cheapest$513	Average$709	FlexibilityNo cancel fee	On-time70%
Delta	Cheapest$519	Average$710	FlexibilityNo cancel fee	On-timeN/A
Austrian Airlines	Cheapest$539	Average$707	FlexibilityNo cancel fee	On-time78%
American Airlines	Cheapest$544	Average$743	FlexibilityNo cancel fee	On-time71%
Brussels Airlines	Cheapest$546	Average$653	FlexibilityNo cancel fee	On-timeN/A
Lufthansa	Cheapest$552	Average$697	FlexibilityNo cancel fee	On-time76%
Virgin Atlantic	Cheapest$553	Average$744	FlexibilityNo cancel fee	On-time72%
Scandinavian Airlines	Cheapest$555	Average$721	FlexibilityNo cancel fee	On-time77%
United Airlines	Cheapest$578	Average$717	FlexibilityNo cancel fee	On-time69%

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$511+ Cheap flights from London (LON) to San Francisco (SFO)

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 5/23. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from London to San Francisco are usually found in February or November, booked 88 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

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Find flight deals from London to San Francisco

Cheapest flights from London to San FranciscoExplore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

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

Compare providers for flights from London to San Francisco

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to San Francisco in April.

The best insider tips for London to San Francisco flights

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Best time to book a flight from London to San Francisco

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from London to San Francisco. Price data was last updated on April 4, 2025.

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

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

Find hourly flight availability from London to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 11, 2025.

Weekly flight availability from London to San Francisco

Explore weekly flight availability from London to San Francisco. 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 April 11, 2025.

Rainfall in San Francisco by month

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

Temperature in San Francisco by month

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

Reviews of airlines servicing San Francisco

See what other customers who have flown with Delta, Air New Zealand and KLM from London to San Francisco have to say. You can also see how each airline compares 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 London to San Francisco. 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 into for flights to San Francisco from London?

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

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

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What are the cheapest flights from London to San Francisco?

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

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

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

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Top 10 airlines flying from London to San Francisco

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Cheapest flights from London to San Francisco
Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.