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Cheap flights from London Stansted Airport to San Francisco from $492

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Stansted Airport to San Francisco departing on 4/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from London Stansted Airport to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:30 am - 3:35 pm
STN
-
SFO
15h 05m1 stop
Multiple Airlines Logo
6:20 pm - 6:20 pm
SFO
-
STN
16h 00m1 stop
$646Multiple Airlines
Sat, Jan 17 - Sun, Jan 25
Multiple Airlines Logo
8:30 pm - 3:35 pm
STN
-
SFO
26h 05m2 stops
Multiple Airlines Logo
5:40 pm - 8:45 pm
SFO
-
STN
20h 05m2 stops
$649Multiple Airlines
Mon, Mar 9 - Fri, Mar 20
Multiple Airlines Logo
6:30 am - 3:35 pm
STN
-
SFO
17h 05m1 stop
Multiple Airlines Logo
5:20 pm - 2:20 pm
SFO
-
STN
13h 00m1 stop
$650Multiple Airlines
Mon, Jan 12 - Mon, Jan 26
Multiple Airlines Logo
7:55 am - 5:55 pm
STN
-
SFO
18h 00m1 stop
Multiple Airlines Logo
7:40 pm - 8:55 pm
SFO
-
STN
17h 15m1 stop
$651Multiple Airlines
Tue, Apr 28 - Tue, May 26
Multiple Airlines Logo
6:30 am - 3:35 pm
STN
-
SFO
17h 05m1 stop
Multiple Airlines Logo
5:20 pm - 11:05 pm
SFO
-
STN
21h 45m1 stop
$660Multiple Airlines
Sat, Jan 31 - Sat, Feb 7
Multiple Airlines Logo
11:55 am - 2:35 pm
STN
-
SFO
34h 40m2 stops
Multiple Airlines Logo
4:40 pm - 12:10 am
SFO
-
STN
23h 30m2 stops
$662Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
Multiple Airlines Logo
6:30 am - 3:35 pm
STN
-
SFO
17h 05m1 stop
Multiple Airlines Logo
5:20 pm - 6:20 pm
SFO
-
STN
17h 00m1 stop
$671Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
Multiple Airlines Logo
8:05 pm - 11:50 am
STN
-
SFO
23h 45m2 stops
Multiple Airlines Logo
3:40 pm - 12:10 am
SFO
-
STN
24h 30m2 stops
$672Multiple Airlines
Thu, Jan 15 - Fri, Jan 30
Multiple Airlines Logo
3:00 pm - 2:45 pm
STN
-
SFO
31h 45m2 stops
Multiple Airlines Logo
7:10 pm - 12:10 am
SFO
-
STN
21h 00m2 stops
$676Multiple Airlines
Fri, Feb 13 - Fri, Feb 20
Multiple Airlines Logo
12:25 pm - 2:35 pm
STN
-
SFO
34h 10m2 stops
Multiple Airlines Logo
4:40 pm - 11:10 pm
SFO
-
STN
22h 30m2 stops
$678Multiple Airlines
Thu, Feb 26 - Thu, Mar 5

momondo Fare Finder

 
Customize your flight search to find flights from London Stansted Airport 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, momondo users made 832,500 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from London Stansted Airport to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Sat 1/17

8:30 am-3:35 pm

1 stop15h 05m

San Francisco

Sun 1/25

6:20 pm-6:20 pm

1 stop16h 00m

$646

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Mon 3/9

8:30 pm-3:35 pm

2 stops26h 05m

San Francisco

Fri 3/20

5:40 pm-8:45 pm

2 stops20h 05m

$649

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Mon 1/12

6:30 am-3:35 pm

1 stop17h 05m

San Francisco

Mon 1/26

5:20 pm-2:20 pm

1 stop13h 00m

$650

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Tue 4/28

7:55 am-5:55 pm

1 stop18h 00m

San Francisco

Tue 5/26

7:40 pm-8:55 pm

1 stop17h 15m

$651

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Sat 1/31

6:30 am-3:35 pm

1 stop17h 05m

San Francisco

Sat 2/7

5:20 pm-11:05 pm

1 stop21h 45m

$660

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Fri 1/30

11:55 am-2:35 pm

2 stops34h 40m

San Francisco

Fri 2/6

4:40 pm-12:10 am

2 stops23h 30m

$662

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Fri 1/30

6:30 am-3:35 pm

1 stop17h 05m

San Francisco

Fri 2/6

5:20 pm-6:20 pm

1 stop17h 00m

$671

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Thu 1/15

8:05 pm-11:50 am

2 stops23h 45m

San Francisco

Fri 1/30

3:40 pm-12:10 am

2 stops24h 30m

$672

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Fri 2/13

3:00 pm-2:45 pm

2 stops31h 45m

San Francisco

Fri 2/20

7:10 pm-12:10 am

2 stops21h 00m

$676

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Thu 2/26

12:25 pm-2:35 pm

2 stops34h 10m

San Francisco

Thu 3/5

4:40 pm-11:10 pm

2 stops22h 30m

$678

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Francisco from

How to get the cheapest flight ticket from London Stansted Airport to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart from London Stansted Airport to San Francisco is on a Thursday when prices can be found for as low as $681. The most expensive day to fly to San Francisco is Friday, with ticket prices averaging around $747.

What is the cheapest time of day to depart on your flight to San Francisco?

Our data shows that the cheapest London Stansted Airport to San Francisco flights are usually those with departure times in the evening. Our users have found flights to San Francisco in the evening for as low as $682. Flights in the afternoon are often more expensive with an average ticket price of $737.

When to book flights from London Stansted Airport to San Francisco

Are you open to changing your travel dates? Check out the ideal times to fly from London Stansted Airport to San Francisco according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London Stansted Airport to San Francisco (STN to SFO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Stansted Airport to San Francisco

Fastest flight time

17h 05m

Direct flights

None
The fastest flight from London Stansted Airport to San Francisco takes 17h 05m
There are no direct flights from London Stansted Airport to San Francisco. There are no popular flight routes from London Stansted Airport to San Francisco.
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  • How far is London Stansted to San Francisco by plane?

    The distance between London Stansted and San Francisco is about 5340.7 mi. Typically, this will take 17h 05m by plane in normal conditions.

  • When did momondo last update prices for flights from London Stansted Airport to San Francisco Airport?

    Prices for flights from London Stansted Airport to San Francisco Airport are refreshed on a daily basis.

  • How old do you have to be to fly from London Stansted Airport to San Francisco Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Stansted Airport to San Francisco Airport.

  • What documentation or ID do you need to fly to San Francisco Airport?

    The required travel and health documents for your San Francisco Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Francisco Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Carmel-by-the-Sea
Modesto
Sonoma
Bodega Bay
Roseville
Hayward
Calistoga
Big Sur
Berkeley
Santa Clara
Walnut Creek
Fremont
Daly City
Half Moon Bay
Vallejo
Salinas
Livermore
Sunnyvale
Turlock

Why use momondo?

Why should I use momondo to find a flight deal from London to San Francisco?

Finding the right flight to San Francisco from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Francisco quick and easy, saving you time and money.

Can I find flights from London to San Francisco with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to San Francisco flights to just show those with flexible booking policies.

How can momondo help me find flights from London to San Francisco?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Francisco from London.

I’m not ready to book a flight from London to San Francisco right now. Can momondo alert me if prices change?

If you are not ready to book a flight from London to San Francisco now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to San Francisco and let you know when they change.

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