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£420+ Cheap flights to San Francisco
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/8. Fares are subject to change and may not be available on all flights or dates of travel.
— SFO
7 Aug — 14 Aug1
Return
1 adult
Economy
Flights to San Francisco in 2025
Find the latest flights to San Francisco in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 2 August 2025.
Find flight deals to San Francisco
Cheapest flights to San FranciscoExplore the most affordable flight options available to San Francisco. Find the lowest fares based on data from user searches, with prices last updated on 2 August 2025.
Explore the most affordable flight options available to San Francisco. Find the lowest fares based on data from user searches, with prices last updated on 2 August 2025.
Wed 3/906:00LHR - SFO
1 stop18h 10mSWISS
Tue 9/919:30SFO - LHR
1 stop14h 20mSWISS
Deal found 1/8£420
Fri 5/918:40LGW - SFO
2 stops33h 30mSWISS
Sun 14/919:30SFO - LGW
1 stop14h 20mSWISS
Deal found 31/7£420
Mon 15/913:20STN - SFO
2 stops35h 10mMultiple Airlines
Mon 22/919:40SFO - STN
2 stops17h 20mMultiple Airlines
Deal found 1/8£420
Mon 18/806:30LHR - SFO
1 stop21h 20mLufthansa
Tue 18/1112:50SFO - LHR
Nonstop10h 35mLufthansa
Deal found 31/7£421
Sat 4/1013:00LGW - SFO
2 stops18h 16mAmerican Airlines
Sun 12/1006:00SFO - LGW
2 stops17h 50mAmerican Airlines
Deal found 1/8£421
Sun 24/807:25LHR - SFO
1 stop14h 55mUnited Airlines
Tue 9/908:30SFO - LHR
1 stop14h 00mUnited Airlines
Deal found 31/7£422
Thu 4/910:45LGW - SFO
1 stop32h 28mMultiple Airlines
Wed 17/911:12SFO - LGW
1 stop15h 43mMultiple Airlines
Deal found 1/8£422
Tue 23/911:35LGW - SFO
2 stops29h 49mBritish Airways
Tue 30/906:10SFO - LGW
1 stop18h 00mBritish Airways
Deal found 31/7£423
Tue 16/908:45LHR - SFO
2 stops18h 53mAir Canada
Sat 27/908:40SFO - LHR
2 stops16h 55mAir Canada
Deal found 1/8£423
Wed 10/916:25LGW - SFO
1 stop30h 05mTAP AIR PORTUGAL
Wed 17/916:20SFO - LGW
1 stop33h 25mTAP AIR PORTUGAL
Deal found 31/7£426
Sun 24/814:05LHR - SFO
Nonstop11h 10mBritish Airways
Tue 9/916:30SFO - LHR
Nonstop10h 25mBritish Airways
Deal found 1/8£426
Mon 15/912:50LTN - SFO
2 stops35h 40mMultiple Airlines
Mon 22/919:40SFO - LTN
2 stops17h 45mMultiple Airlines
Deal found 1/8£428
Cheapflights Fare Finder
Locate flights to San Francisco that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 2 August 2025.
Use the filters below to find and compare flights to San Francisco that are best for you.
Fly from
London
Route
Depart
Return
Price
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Wed 3/9
06:00-16:10
1 stop18h 10m
San Francisco
Tue 9/9
19:30-17:50
1 stop14h 20m
£420
LondonSan Francisco
STN - SFO
STNSFO
London Stansted
Mon 15/9
13:20-16:30
2 stops35h 10m
San Francisco
Mon 22/9
19:40-21:00
2 stops17h 20m
£420
LondonSan Francisco
LGW - SFO
LGWSFO
London Gatwick
Fri 5/9
18:40-20:10
2 stops33h 30m
San Francisco
Sun 14/9
19:30-17:50
1 stop14h 20m
£420
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Mon 18/8
07:30-15:55
1 stop16h 25m
San Francisco
Fri 14/11
12:50-07:25
Nonstop10h 35m
£421
LondonSan Francisco
LGW - SFO
LGWSFO
London Gatwick
Sat 4/10
13:00-23:16
2 stops18h 16m
San Francisco
Sun 12/10
06:00-07:50
2 stops17h 50m
£421
LondonSan Francisco
LGW - SFO
LGWSFO
London Gatwick
Thu 4/9
10:45-11:13
1 stop32h 28m
San Francisco
Wed 17/9
11:12-10:55
1 stop15h 43m
£422
LondonSan Francisco
LGW - SFO
LGWSFO
London Gatwick
Tue 23/9
11:35-09:24
2 stops29h 49m
San Francisco
Tue 30/9
06:10-08:10
1 stop18h 00m
£423
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Tue 16/9
08:45-19:38
2 stops18h 53m
San Francisco
Sat 27/9
08:40-09:35
2 stops16h 55m
£423
LondonSan Francisco
LGW - SFO
LGWSFO
London Gatwick
Wed 10/9
16:25-14:30
1 stop30h 05m
San Francisco
Wed 17/9
16:20-09:45
1 stop33h 25m
£426
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Sun 24/8
14:05-17:15
Nonstop11h 10m
San Francisco
Tue 9/9
16:30-10:55
Nonstop10h 25m
£426
Showing 1-10 of 47 results
Best time to book a flight to San Francisco
Have a flexible travel schedule? Discover the best time to fly to 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 to San Francisco
When is the best time to book a flight to San Francisco?
Use this chart to determine the optimal time to book a return flight from London to San Francisco. Price data was last updated on 25 July 2025.
Booking 86 days in advance of your planned departure date is, on average, the best time to get cheap flights to San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
How long is the flight to San Francisco?
On average, a flight from London to San Francisco takes 14 hours 19 minutes. Flights to San Francisco from other popular cities in United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.
When is the cheapest time to fly to San Francisco?
Use this chart to determine the cheapest time to fly return from London to San Francisco. Price data was last updated on 16 December 2024.
Users looking for the lowest fares to San Francisco should consider flying on Friday evenings, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday evenings, when prices are usually at their highest.
Weekly flight availability to San Francisco
The most flights from London to San Francisco are scheduled on a Monday (43 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (37 on average).
What are the most popular airlines that fly to San Francisco?
The most popular airlines flying from London to San Francisco are Virgin Atlantic, British Airways and Lufthansa.
What are the cheapest airlines that fly to San Francisco?
The cheapest airlines flying from London to San Francisco are Delta, TAP AIR PORTUGAL and Scandinavian Airlines.
Rainfall in San Francisco by month
Plan your trip to San Francisco by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 inches per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.
Temperature in San Francisco by month
Plan your trip to San Francisco by taking into account the average temperature totals 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).
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 2 August 2025.
Check out reviews from past customers who have flown Delta, Air New Zealand, andKLM to the United States to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.2
Comfort
7.9
Crew
8.5
Entertainment
7.9
Food
7.3
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Boarding
8.2
Comfort
7.9
Crew
8.5
Entertainment
7.9
Food
7.3
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Boarding
8.2
Comfort
7.9
Crew
8.5
Entertainment
7.9
Food
7.3
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Boarding
8.2
Comfort
7.9
Crew
8.5
Entertainment
7.9
Food
7.3
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Boarding
8.2
Comfort
7.9
Crew
8.5
Entertainment
7.9
Food
7.3
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Boarding
8.2
Comfort
7.9
Crew
8.5
Entertainment
7.9
Food
7.3
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
FAQs about flying to San Francisco
San Francisco airport overview
San Francisco International Airport is located 21km (13 miles) south of downtown San Francisco and is the largest airport in the Bay Area and the second-busiest airport in California.
Comprising four terminals – Terminals 1, 2, 3 and the International Terminal – that form a ring around a multi-storey Domestic Parking garage, San Francisco International is easy to navigate. Terminals 1-3 handle all domestic flights, while the International Terminal mainly manages international flights. Customs, immigrations and baggage claims are generally fast; staff are friendly, signage is good and transport to and from the airport is excellent. Delays are common, though, due to the region’s adverse weather patterns; however, there are plans to extend the runways in order to aid aircraft flying in low visibility conditions.
San Francisco International is clean and modern. With its newly revamped Terminal 2 housing an award-winning aviation museum and library, along with an extensive array of retail, dining, entertainment and health establishments, it is truly a world-class facility.
Flights to San Francisco International Airport comes from a number of destinations worldwide, including Toronto, Paris, Tokyo, London, Hong Kong, Seoul, Lima, Frankfurt, Singapore, San Salvador, Beijing, Mexico City, Sydney and Cancun, in addition to numerous domestic routes.
Travelling to a place near San Francisco?
Book flights to San Francisco if you plan to visit one of these locationsSanta Cruz
Newark
Vallejo
South San Francisco
Bodega Bay
Pacific Grove
Union City
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Users can book flights with no change fees policies with our dedicated filters. Book flights to San Francisco flexibly with Cheapflights today.
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Not ready to book yet? You can track prices for flights to San Francisco on Cheapflights with our Price Alerts feature and get notified when better prices are available.