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Cheap flights from the United Kingdom to San Francisco from £309

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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
23 Nov — 30 Nov1
1 adult
1 adult, Economy, 0 bags

Find 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 24 October 2025.

Tue 25/1118:30LHR - SFO
1 stop28h 00mTAP AIR PORTUGAL
Wed 3/1216:35SFO - LHR
1 stop22h 05mTAP AIR PORTUGAL
Deal found 23/10£383
Sat 8/1106:00LHR - SFO
1 stop16h 45mTAP AIR PORTUGAL
Sat 15/1116:35SFO - LHR
1 stop36h 05mTAP AIR PORTUGAL
Deal found 23/10£389
Mon 24/1106:40LHR - SFO
1 stop15h 55mScandinavian Airlines
Mon 8/1216:40SFO - LHR
1 stop15h 20mScandinavian Airlines
Deal found 23/10£397
Fri 5/1206:00LHR - SFO
1 stop18h 05mTAP AIR PORTUGAL
Mon 8/1216:35SFO - LHR
1 stop16h 55mTAP AIR PORTUGAL
Deal found 23/10£398
Thu 20/1117:30LHR - SFO
2 stops29h 05mScandinavian Airlines
Fri 5/1216:40SFO - LHR
1 stop15h 20mScandinavian Airlines
Deal found 22/10£405
Wed 26/1108:30STN - SFO
2 stops35h 20mMultiple Airlines
Wed 3/1215:40SFO - STN
2 stops21h 25mMultiple Airlines
Deal found 23/10£409
Sat 22/1106:40LHR - SFO
1 stop15h 55mScandinavian Airlines
Sat 6/1216:40SFO - LHR
1 stop17h 00mScandinavian Airlines
Deal found 23/10£413
Tue 25/1116:35LGW - SFO
1 stop29h 55mTAP AIR PORTUGAL
Fri 5/1219:10SFO - LGW
2 stops29h 10mTAP AIR PORTUGAL
Deal found 22/10£413
Wed 12/1106:00LHR - SFO
1 stop16h 30mTAP AIR PORTUGAL
Wed 14/116:35SFO - LHR
1 stop16h 55mTAP AIR PORTUGAL
Deal found 23/10£414
Wed 26/1108:50LGW - SFO
2 stops35h 00mMultiple Airlines
Wed 3/1215:40SFO - LGW
2 stops20h 15mMultiple Airlines
Deal found 23/10£414
Fri 21/1106:40LHR - SFO
1 stop15h 55mScandinavian Airlines
Sun 30/1116:40SFO - LHR
1 stop17h 00mScandinavian Airlines
Deal found 22/10£415
Mon 10/1106:40LHR - SFO
1 stop15h 55mScandinavian Airlines
Thu 13/1116:40SFO - LHR
1 stop15h 20mScandinavian Airlines
Deal found 22/10£415

Cheap 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 24 October 2025.

Round-trip from

£383

One-way from

£309

Popular in

July

Cheapest in

September

Average price

£490

Good round-trip deal

£486 or less

Good one-way deal

£452 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 25/11-3/12
  • 2 total stops
  • 50h 05m total
  • United Kingdom to San Francisco
Search Deals
6/12
  • 6/12
  • 2 total stops
  • 49h 15m total
  • United Kingdom to San Francisco
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£63 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
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 24 October 2025.
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

Fri 14/11

06:40-14:35

1 stop15h 55m

San Francisco

Mon 24/11

16:40-16:00

1 stop15h 20m

£433

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 18/1

21:05-14:35

2 stops25h 30m

San Francisco

Fri 23/1

16:40-08:55

2 stops32h 15m

£442

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Mon 24/11

21:25-14:30

2 stops49h 05m

San Francisco

Mon 8/12

16:35-15:45

1 stop15h 10m

£451

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Sun 7/12

08:30-16:35

1 stop16h 05m

San Francisco

Sun 14/12

18:20-18:20

1 stop16h 00m

£453

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 13/3

21:05-15:35

2 stops25h 30m

San Francisco

Sat 21/3

17:40-18:50

2 stops18h 10m

£455

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 14/3

06:40-15:35

1 stop15h 55m

San Francisco

Sun 22/3

17:40-16:00

1 stop15h 20m

£456

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Mon 23/3

21:25-15:30

2 stops49h 05m

San Francisco

Fri 10/4

20:20-09:45

1 stop29h 25m

£462

LondonSan Francisco

LTN - SFO

LTNSFO

London Luton

Wed 14/1

06:50-15:35

1 stop16h 45m

San Francisco

Wed 21/1

17:20-17:05

1 stop15h 45m

£463

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 14/1

09:00-16:30

1 stop15h 30m

San Francisco

Mon 2/2

12:55-10:50

1 stop13h 55m

£466

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 21/1

09:00-16:30

1 stop15h 30m

San Francisco

Wed 28/1

11:45-16:20

2 stops20h 35m

£467

Flights are sorted by cheapest return flights first.

Deals found on 23/10

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, December 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 £460). 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 24 October 2025.

When flying from United Kingdom to San Francisco, 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 9% versus a flight at midday.

What is the cheapest day to fly from United Kingdom to San Francisco?

Use this chart to determine the cheapest time to fly return from United Kingdom to San Francisco. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their United Kingdom to San Francisco flight should consider departing on Friday evenings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 24 October 2025.
Read reviews from past customers who have flown with KLM, Virgin Atlantic, andUnited Airlines 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.
KLM
7.7
Good
1,405 reviews
Check prices

Food

7.3

Comfort

7.6

Crew

8.4

Boarding

7.8

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,405 reviews
KLM
7.7
Good
1,405 reviews
Check prices

Food

7.3

Comfort

7.6

Crew

8.4

Boarding

7.8

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Virgin Atlantic
7.5
Good
670 reviews
KLM
7.7
Good
1,405 reviews
Check prices

Food

7.3

Comfort

7.6

Crew

8.4

Boarding

7.8

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
8,995 reviews
KLM
7.7
Good
1,405 reviews
Check prices

Food

7.3

Comfort

7.6

Crew

8.4

Boarding

7.8

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Lufthansa
6.8
Okay
7,518 reviews
KLM
7.7
Good
1,405 reviews
Check prices

Food

7.3

Comfort

7.6

Crew

8.4

Boarding

7.8

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
British Airways
6.7
Okay
7,469 reviews
KLM
7.7
Good
1,405 reviews
Check prices

Food

7.3

Comfort

7.6

Crew

8.4

Boarding

7.8

Overall

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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 30m. Scandinavian Airlines provides one of the quickest options available for as low as £466. 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 SWISS, which is currently one of the cheapest options available, starting at £348. British Airways flights start at £349 while deals on United Airlines start at £355 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 New Zealand (87%), KLM (85%) and Air France (85%).

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

    On average you can expect to pay £1,966 for a flight from United Kingdom to San Francisco. The cheapest flight overall is £338 while the most popular route, (London Heathrow - San Francisco) is currently priced at £355.

  • 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, December 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 £460). 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
South San Francisco
Bodega Bay
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 24 October 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£239Average£570FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£338Average£578FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Aer LingusCheapest£353Average£705FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£355Average£540FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£358Average£511FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Brussels AirlinesCheapest£360Average£480FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
SWISSCheapest£360Average£546FlexibilityNo cancel feeOn-time79%
Search SWISS flights
United AirlinesCheapest£368Average£578FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest£373Average£509FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapest£375Average£590FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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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