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Cheap flights from the United Kingdom to San Francisco from £256

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 20/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
18 Mar — 25 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from United Kingdom to San Francisco
Explore the most affordable flight options available from United Kingdom to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 February 2026.

Thu 7/508:45
LHR
-
SFO
1 stop15h 30m
United Airlines
Sun 10/506:45
SFO
-
LHR
1 stop18h 55m
United Airlines
Deal found 14/2£365
Thu 19/309:00
LHR
-
SFO
1 stop15h 30m
United Airlines
Mon 6/414:30
SFO
-
LHR
1 stop13h 20m
United Airlines
Deal found 13/2£366
Tue 24/218:40
LGW
-
SFO
1 stop29h 50m
SWISS
Tue 3/319:25
SFO
-
LGW
1 stop14h 25m
SWISS
Deal found 15/2£366
Tue 22/908:45
LHR
-
SFO
1 stop15h 30m
Lufthansa
Tue 29/916:50
SFO
-
LHR
Nonstop10h 20m
Lufthansa
Deal found 13/2£367
Tue 22/908:45
LHR
-
SFO
2 stops17h 56m
Air Canada
Sun 27/911:10
SFO
-
LHR
1 stop14h 50m
Air Canada
Deal found 13/2£368
Thu 19/220:05
LHR
-
SFO
1 stop28h 25m
SWISS
Wed 11/311:55
SFO
-
LHR
2 stops21h 25m
SWISS
Deal found 12/2£368
Wed 15/409:15
LGW
-
SFO
1 stop15h 00m
SWISS
Thu 23/419:35
SFO
-
LGW
1 stop14h 15m
SWISS
Deal found 14/2£368
Sat 18/407:25
LHR
-
SFO
1 stop15h 05m
United Airlines
Fri 24/412:50
SFO
-
LHR
Nonstop10h 35m
United Airlines
Deal found 16/2£369
Fri 13/319:20
LCY
-
SFO
1 stop29h 10m
SWISS
Mon 16/320:25
SFO
-
LCY
1 stop13h 40m
SWISS
Deal found 13/2£369
Mon 23/307:40
LHR
-
SFO
1 stop19h 55m
United Airlines
Thu 16/411:20
SFO
-
LHR
1 stop18h 00m
United Airlines
Deal found 12/2£370
Wed 15/409:15
LGW
-
SFO
1 stop15h 00m
SWISS
Thu 30/414:00
SFO
-
LGW
1 stop19h 50m
SWISS
Deal found 13/2£370
Fri 15/508:40
LHR
-
SFO
1 stop15h 35m
United Airlines
Tue 26/523:59
SFO
-
LHR
1 stop13h 36m
United Airlines
Deal found 13/2£370

Find flight deals from United Kingdom to San Francisco

Keep the following information in mind while searching for United Kingdom to San Francisco flight deals. Data was last updated 16 February 2026.

Round-trip from

£365

One-way from

£256

Popular in

July

Cheapest in

February

Average price

£413

Good round-trip deal

£406 or less

Good one-way deal

£450 or less
United Airlines
  • United Airlines
  • 15/4-25/4
  • 2 total stops
  • 30h 30m total
  • United Kingdom to San Francisco
Search Deals
20/6
  • 20/6
  • 2 total stops
  • 47h 05m total
  • United Kingdom to San Francisco
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£50 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from United Kingdom to San Francisco.
Search Deals
Price to beat on a one-way flight from United Kingdom to San Francisco.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from United Kingdom to San Francisco 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 16 February 2026.
Use the filters below to find and compare flights from the United Kingdom to San Francisco that are best for you.

Fly from

United Kingdom

Fly to

San Francisco

Route

Depart

Return

Price

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 15/4

08:40-16:15

1 stop15h 35m

San Francisco

Thu 30/4

06:45-12:20

1 stop21h 35m

£365

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 27/4

07:25-14:30

1 stop15h 05m

San Francisco

Wed 20/5

16:35-11:10

Nonstop10h 35m

£369

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 24/3

11:10-20:35

1 stop16h 25m

San Francisco

Sat 4/4

06:00-10:10

1 stop20h 10m

£370

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 25/4

07:25-14:30

1 stop15h 05m

San Francisco

Wed 6/5

10:05-10:10

1 stop16h 05m

£370

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 3/6

08:40-16:15

1 stop15h 35m

San Francisco

Wed 29/7

05:00-09:40

1 stop20h 40m

£378

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 8/4

08:40-16:15

1 stop15h 35m

San Francisco

Thu 16/4

19:30-14:10

Nonstop10h 40m

£378

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 6/3

20:05-16:30

1 stop28h 25m

San Francisco

Mon 9/3

20:25-21:25

2 stops18h 00m

£379

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 2/3

14:25-16:30

2 stops34h 05m

San Francisco

Mon 23/3

20:25-17:50

1 stop14h 25m

£380

LondonSan Francisco

LTN - SFO

LTNSFO

London Luton

Thu 16/4

05:40-17:55

1 stop20h 15m

San Francisco

Sun 26/4

19:40-11:00

1 stop31h 20m

£417

EdinburghSan Francisco

EDI - SFO

EDISFO

Edinburgh Turnhouse

Wed 18/3

18:55-16:00

1 stop28h 05m

San Francisco

Tue 24/3

18:30-19:10

1 stop17h 40m

£417

Flights are sorted by cheapest return flights first.

Deals found on 14/2

Showing 1-10 of 60 results
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Best time to book a flight from United Kingdom to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from United Kingdom 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 the United Kingdom to San Francisco

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

Currently, February is the cheapest month in which you can book a flight from United Kingdom to San Francisco (average of £340). Flying from United Kingdom to San Francisco in July is currently the most expensive (average of £436). 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 GB to SFO?

Find hourly flight availability from United Kingdom 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 16 February 2026.

When flying from United Kingdom to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from United Kingdom to San Francisco

Explore weekly flight availability from United Kingdom 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 16 February 2026.

The most flights from GB0 to SFO 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 often are flights from the United Kingdom to San Francisco delayed?

About 11% of weekly flights between United Kingdom and San Francisco have experienced delays in the past year, with the average delay time being 148 minutes.

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

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

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

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

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

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 10% of flights being delayed.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated 16 February 2026.
Read reviews from past customers who have flown with Virgin Atlantic, United Airlines, andAer Lingus from the United Kingdom to San Francisco. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Entertainment

7.6

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.2

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
678 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Entertainment

7.6

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.2

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
9,306 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Entertainment

7.6

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.2

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!
Aer Lingus
7.2
Good
1,455 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Entertainment

7.6

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.2

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
7,786 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Entertainment

7.6

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.2

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
7,752 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Entertainment

7.6

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Crew

8.2

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 United Kingdom 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 United Kingdom?

    If you book a flight to San Francisco from United Kingdom, you will be flying to San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.8 mi from the center of San Francisco.

  • How long is the flight from United Kingdom to San Francisco?

    A quick flight from United Kingdom to San Francisco can take about 15h 35m. United Airlines provides one of the quickest options available for as low as £365. Airlines will cover a distance of 5350 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from United Kingdom to San Francisco one-way?

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £205. JetBlue flights start at £240 while deals on TAP AIR PORTUGAL start at £266 one-way.

  • What are the most popular routes from United Kingdom to San Francisco?

    Most travelers choose London Heathrow - San Francisco, London Gatwick - San Francisco or London City - San Francisco when deciding on the best route from United Kingdom to San Francisco.

  • What are the most reliable airlines from United Kingdom to San Francisco?

    The top 3 most reliable airlines when flying from United Kingdom to San Francisco are KLM (82%), Air France (82%) and Delta (82%).

  • What are the cheapest flights from United Kingdom to San Francisco?

    On average you can expect to pay £1,934 for a flight from United Kingdom to San Francisco. The cheapest flight overall is £336 while the most popular route, (London Heathrow - San Francisco) is currently priced at £343.

  • Can I find deals for flights from United Kingdom to San Francisco that include hotel bookings?

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

  • How can I find direct flights from United Kingdom to San Francisco?

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

  • Can I find deals for business class flights from United Kingdom to San Francisco?

    Yes. Cheapflights offers flight deals from United Kingdom 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 United Kingdom to San Francisco?

    Currently, February is the cheapest month in which you can book a flight from United Kingdom to San Francisco (average of £340). Flying from United Kingdom to San Francisco in July is currently the most expensive (average of £436). 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 San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Newark
San Bruno
Bodega Bay
South San Francisco
Sunnyvale
Pacific Grove

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Alternative routes for United Kingdom to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from United Kingdom to San Francisco

Discover the top 10 airlines that operate flights from United Kingdom to San Francisco. 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 16 February 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£233Average£572FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£330Average£560FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£341Average£569FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
SWISSCheapest£345Average£533FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aer LingusCheapest£346Average£690FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£351Average£496FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£353Average£450FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£366Average£465FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
FinnairCheapest£366Average£513FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£368Average£519FlexibilityNo cancel feeOn-time70%
Search British Airways 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 United Kingdom to San Francisco?

Cheapflights makes it easy to find United Kingdom to San Francisco flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from United Kingdom to San Francisco.

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

Yes, we can. To see specific flights from United Kingdom to San Francisco with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from United Kingdom to San Francisco 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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