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Cheap flights from the United Kingdom to San Francisco from £297

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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
31 May — 7 Jun1
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 1 May 2026.

Fri 15/511:05
LHR
-
SFO
1 stop18h 15m
United Airlines
Sun 31/523:59
SFO
-
LHR
1 stop13h 36m
United Airlines
Deal found 28/4£459
Fri 15/513:00
LHR
-
SFO
Nonstop11h 10m
United Airlines
Fri 29/523:59
SFO
-
LHR
1 stop13h 26m
United Airlines
Deal found 28/4£460
Mon 29/617:45
LHR
-
SFO
1 stop14h 21m
Delta
Tue 14/706:00
SFO
-
LHR
1 stop16h 25m
Delta
Deal found 30/4£464
Thu 2/717:45
LHR
-
SFO
1 stop14h 21m
Delta
Sun 12/707:00
SFO
-
LHR
1 stop17h 50m
Delta
Deal found 30/4£469
Mon 7/906:30
LHR
-
SFO
1 stop13h 15m
Virgin Atlantic
Mon 14/912:20
SFO
-
LHR
1 stop14h 20m
Virgin Atlantic
Deal found 27/4£474
Tue 30/610:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Mon 13/716:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 30/4£478
Wed 16/1210:05
LHR
-
SFO
Nonstop11h 15m
United Airlines
Mon 4/112:50
SFO
-
LHR
Nonstop10h 35m
United Airlines
Deal found 29/4£479
Tue 5/506:55
LHR
-
SFO
1 stop15h 35m
Lufthansa
Tue 12/512:45
SFO
-
LHR
1 stop13h 55m
Lufthansa
Deal found 28/4£480
Tue 12/507:45
LHR
-
SFO
1 stop16h 56m
United Airlines
Fri 29/521:15
SFO
-
LHR
1 stop16h 10m
United Airlines
Deal found 28/4£481
Wed 24/607:45
LHR
-
SFO
1 stop18h 19m
United Airlines
Mon 3/819:50
SFO
-
LHR
Nonstop10h 20m
United Airlines
Deal found 30/4£482
Wed 6/507:25
LHR
-
SFO
1 stop15h 05m
Lufthansa
Fri 15/521:05
SFO
-
LHR
1 stop14h 35m
Lufthansa
Deal found 27/4£483
Mon 7/910:45
LHR
-
SFO
Nonstop11h 05m
Iberia
Mon 14/919:30
SFO
-
LHR
Nonstop10h 25m
Iberia
Deal found 27/4£484

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 1 May 2026.

Round-trip from

£459

One-way from

£307

Popular in

December

Cheapest in

February

Average price

£495

Good round-trip deal

£550 or less

Good one-way deal

£506 or less
United Airlines
  • United Airlines
  • 15/5-31/5
  • 2 total stops
  • 31h 51m total
  • United Kingdom to San Francisco
Search Deals
19/5
  • 19/5
  • 3 total stops
  • 45h 13m total
  • United Kingdom to San Francisco
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£14 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 May 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 1 May 2026.
Use the filters below to find and compare flights from the United Kingdom to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

GlasgowSan Francisco

GLA - SFO

GLASFO

Glasgow Intl

Wed 16/9

14:00-22:37

1 stop16h 37m

San Francisco

Wed 23/9

10:15-10:10

1 stop15h 55m

£500

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 12/5

08:45-16:25

1 stop15h 40m

San Francisco

Fri 22/5

12:15-10:10

1 stop13h 55m

£511

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 27/10

06:30-12:50

1 stop13h 20m

San Francisco

Tue 3/11

13:35-10:00

1 stop12h 25m

£512

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 28/9

06:30-11:45

1 stop13h 15m

San Francisco

Mon 5/10

23:15-17:30

Nonstop10h 15m

£519

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 30/5

09:20-21:04

1 stop19h 44m

San Francisco

Sat 6/6

05:50-07:10

1 stop17h 20m

£526

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 30/8

06:30-11:45

1 stop13h 15m

San Francisco

Sun 6/9

18:50-17:35

1 stop14h 45m

£531
Fastest return journey

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 2/7

18:30-21:25

Nonstop10h 55m

San Francisco

Thu 23/7

17:55-12:15

Nonstop10h 20m

£538

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 14/5

16:15-19:25

Nonstop11h 10m

San Francisco

Thu 21/5

19:45-10:10

1 stop30h 25m

£542

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 22/9

19:50-14:40

2 stops26h 50m

San Francisco

Tue 29/9

16:45-18:50

2 stops18h 05m

£548

LondonSan Francisco

LCY - SFO

LCYSFO

London City

Fri 29/5

10:00-10:46

2 stops32h 46m

San Francisco

Sat 27/6

21:06-07:55

2 stops50h 49m

£551

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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

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

Booking 59 days in advance of your planned departure date is, on average, the best time to get cheap flights from United Kingdom to San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 £466). Flying from United Kingdom to San Francisco in December is currently the most expensive (average of £627). 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 1 May 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 1 May 2026.

The most flights from GB0 to SFO 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).

How often are flights from the United Kingdom to San Francisco delayed?

About 12% of weekly flights between United Kingdom and San Francisco have experienced delays in the past year, with the average delay time being 147 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, United Airlines 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 1 May 2026.
Read reviews from past customers who have flown with United Airlines,Virgin Atlantic, 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.
United Airlines
7.4
Good
9,677 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
9,677 reviews
United Airlines
7.4
Good
9,677 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Virgin Atlantic
7.4
Good
688 reviews
United Airlines
7.4
Good
9,677 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Aer Lingus
7.3
Good
1,538 reviews
United Airlines
7.4
Good
9,677 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Lufthansa
6.8
Okay
7,964 reviews
United Airlines
7.4
Good
9,677 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
British Airways
6.7
Okay
7,937 reviews
United Airlines
7.4
Good
9,677 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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 11.0 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 13h 20m. United Airlines provides one of the quickest options available for as low as £512. 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 £207. JetBlue flights start at £242 while deals on TAP AIR PORTUGAL start at £268 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 Air Canada (87%), Austrian Airlines (87%) and United Airlines (87%).

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

    On average you can expect to pay £1,157 for a flight from United Kingdom to San Francisco. The cheapest flight overall is £390 while the most popular route, (London Heathrow - San Francisco) is currently priced at £398.

  • 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 £466). Flying from United Kingdom to San Francisco in December is currently the most expensive (average of £627). 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

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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 1 May 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest£169Average£551FlexibilityNo cancel feeOn-time77%
Search Iberia flights
DeltaCheapest£318Average£681FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£333Average£578FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest£341Average£555FlexibilityNo cancel feeOn-time70%
Search British Airways flights
SWISSCheapest£349Average£553FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aer LingusCheapest£350Average£676FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£354Average£491FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£357Average£463FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
FinnairCheapest£361Average£517FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Brussels AirlinesCheapest£369Average£507FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines 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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