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Cheap flights from San Francisco to London from £289

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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LON
3 Jan — 10 Jan1
1 adult
1 adult, Economy, 0 bags

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

Cheap flight deals from San Francisco to London

Enter your travel dates to find the best prices.

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 4 December 2025.

Mon 8/1216:15SFO - LHR
1 stop13h 15mUnited Airlines
Tue 23/1215:20LHR - SFO
1 stop14h 22mUnited Airlines
Deal found 1/12£444
Wed 10/1216:30SFO - LHR
Nonstop10h 10mDelta
Fri 9/109:40LHR - SFO
1 stop20h 02mDelta
Deal found 2/12£445
Tue 30/1216:10SFO - LHR
1 stop13h 20mLufthansa
Fri 9/116:20LHR - SFO
1 stop17h 10mLufthansa
Deal found 2/12£446
Tue 30/1220:40SFO - LHR
Nonstop10h 30mBritish Airways
Mon 26/115:25LHR - SFO
Nonstop11h 20mBritish Airways
Deal found 2/12£447
Sun 7/1216:15SFO - LHR
1 stop13h 15mLufthansa
Tue 23/1206:35LHR - SFO
1 stop21h 00mLufthansa
Deal found 2/12£448
Mon 1/1219:25SFO - LHR
1 stop14h 25mSWISS
Tue 9/1209:00LHR - SFO
1 stop15h 30mSWISS
Deal found 1/12£448
Tue 9/1219:25SFO - LGW
1 stop14h 25mSWISS
Tue 18/818:35LGW - SFO
1 stop29h 35mSWISS
Deal found 2/12£449
Wed 10/1218:50SFO - LCY
1 stop13h 50mMultiple Airlines
Thu 15/109:15LCY - SFO
1 stop15h 15mMultiple Airlines
Deal found 2/12£450
Wed 10/1217:25SFO - LHR
Nonstop10h 35mUnited Airlines
Thu 18/1207:40LHR - SFO
2 stops18h 27mUnited Airlines
Deal found 1/12£450
Tue 30/1216:10SFO - LHR
1 stop13h 20mMultiple Airlines
Thu 8/108:00LHR - SFO
1 stop19h 55mMultiple Airlines
Deal found 1/12£451
Tue 9/1208:25SFO - STN
2 stops30h 00mMultiple Airlines
Tue 16/1205:55STN - SFO
3 stops23h 44mMultiple Airlines
Deal found 2/12£452
Tue 9/1219:25SFO - LHR
1 stop14h 25mSWISS
Thu 20/820:05LHR - SFO
1 stop28h 05mSWISS
Deal found 2/12£452

Find flight deals from San Francisco to London

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 4 December 2025.

Round-trip from

£444

One-way from

£289

Popular in

June

Cheapest in

September

Average price

£660

Good round-trip deal

£490 or less

Good one-way deal

£289 or less
British Airways
  • British Airways
  • 19/1-11/2
  • Nonstop
  • 21h 45m total
  • San Francisco to London
Search Deals
Virgin Atlantic
  • Virgin Atlantic
  • 9/12
  • 1 total stop
  • 19h 25m total
  • San Francisco to London
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£85 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 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

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 4 December 2025.
Use the filters below to find and compare flights from San Francisco to London that are best for you.

Fly from

San Francisco

Fly to

London

Route

Depart

Return

Price

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 8/4

19:30-14:10

Nonstop10h 40m

London Heathrow

Tue 21/4

07:25-19:00

1 stop19h 35m

£447

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 11/5

19:40-14:10

Nonstop10h 30m

London Heathrow

Tue 19/5

10:50-19:00

1 stop16h 10m

£447

San FranciscoLondon

SFO - STN

SFOSTN

San Francisco

Sun 1/2

16:03-22:10

2 stops22h 07m

London Stansted

Sat 7/2

07:15-14:35

1 stop15h 20m

£448

San FranciscoLondon

SFO - LTN

SFOLTN

San Francisco

Sat 17/1

16:40-22:55

2 stops22h 15m

London Luton

Sat 24/1

20:50-14:35

2 stops25h 45m

£448

San FranciscoLondon

SFO - STN

SFOSTN

San Francisco

Tue 3/2

14:40-22:25

2 stops23h 45m

London Stansted

Wed 11/2

14:25-12:40

2 stops30h 15m

£449

San FranciscoLondon

SFO - LTN

SFOLTN

San Francisco

Tue 13/1

14:40-18:00

2 stops19h 20m

London Luton

Thu 22/1

08:30-19:35

2 stops19h 05m

£449

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 18/2

16:02-17:40

2 stops17h 38m

London Heathrow

Mon 23/2

19:30-23:02

2 stops35h 32m

£451

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 5/4

15:55-10:40

Nonstop10h 45m

London Heathrow

Wed 15/4

06:30-11:45

1 stop13h 15m

£451

San FranciscoLondon

SFO - STN

SFOSTN

San Francisco

Wed 21/1

12:00-15:40

2 stops19h 40m

London Stansted

Sun 25/1

18:05-12:40

2 stops26h 35m

£453

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 6/4

15:59-13:10

1 stop13h 11m

London Heathrow

Tue 14/4

06:30-11:45

1 stop13h 15m

£454

Flights are sorted by cheapest return flights first.

Deals found on 1/12

Showing 1-10 of 60 results
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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?

Use this chart to determine the optimal time to book a return flight from San Francisco to London. Price data was last updated on 28 November 2025.

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 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 San Francisco to London?

Currently, December is the cheapest month in which you can book a flight from San Francisco to London (average of £346). Flying from San Francisco to London in June is currently the most expensive (average of £607). 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?

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 4 December 2025.

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 morning, which can drop the price by up to 25% versus a flight at midday.

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.

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

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 4 December 2025.

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

How much does it cost for a return flight from San Francisco to London?

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.

Copenhagen (CPH) – chosen by Cheapflights users on 45% of one-stop itineraries from San Francisco to London on Cheapflights.

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.

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?

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.

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?

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.

Flights via Dallas (DFW) offer the fastest connection on this route, with an average stopover time of 1h 11m.

How often are flights from San Francisco to London delayed?

About 12% of weekly flights between San Francisco and London have experienced delays in the past year, with the average delay time being 157 minutes.

What is the most punctual flight time for San Francisco to London flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on San Francisco to London flights?

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 9% of flights being delayed.

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 4 December 2025.
Read through reviews of airlines operating flights from San Francisco to London, such as Virgin Atlantic, United Airlines, andIberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
675 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Boarding

7.7

Food

6.9

Crew

8.2

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
675 reviews
Virgin Atlantic
7.5
Good
675 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Boarding

7.7

Food

6.9

Crew

8.2

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
United Airlines
7.4
Good
9,065 reviews
Virgin Atlantic
7.5
Good
675 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Boarding

7.7

Food

6.9

Crew

8.2

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Iberia
7.0
Good
3,038 reviews
Virgin Atlantic
7.5
Good
675 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Boarding

7.7

Food

6.9

Crew

8.2

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Lufthansa
6.8
Okay
7,612 reviews
Virgin Atlantic
7.5
Good
675 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Boarding

7.7

Food

6.9

Crew

8.2

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
British Airways
6.7
Okay
7,557 reviews
Virgin Atlantic
7.5
Good
675 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Boarding

7.7

Food

6.9

Crew

8.2

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Related info for your journey

Find useful and relevant information for your journey from San Francisco to 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?

    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 31 daily outbound flights to London from 7 different airlines.

  • How long is the flight from San Francisco to London?

    Airlines like United Airlines, Scandinavian Airlines, and Delta fly from San Francisco to London in about 10h 40m. The time it takes to get you to your destination can typically vary by up to 6h 58m. There are 5350 mi between San Francisco and London. This flight may include one or multiple stops.

  • 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 £359 on this airline. Additional options worth looking into are KLM and Virgin Atlantic, starting at £368 and £372 round-trip. Scandinavian Airlines is currently priced 36% 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 United Airlines. According to our data, you can fly for as low as £247. Users have also found prices from £267 and £269 on Air France and KLM, 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: American Airlines (90%), Aer Lingus (90%), Alaska Airlines( 90%).

  • What are the cheapest flights from San Francisco to London?

    Looking at all options, your cheapest flight can be booked for £184. While the most popular route (San Francisco - London Heathrow) can be booked for £312 on average, our data indicates £1,288 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, December is the cheapest month in which you can book a flight from San Francisco to London (average of £346). Flying from San Francisco to London in June is currently the most expensive (average of £607). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

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Ilford
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Deal
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Guildford
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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.
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Top 7 airlines flying from San Francisco to London

Discover the top 7 airlines that operate flights from San Francisco to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 4 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£359Average£452FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
KLMCheapest£368Average£508FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£372Average£569FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£390Average£524FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£417Average£667FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£421Average£599FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£430Average£521FlexibilityNo cancel feeOn-time77%
Search Iberia flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Francisco to 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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