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Cheap flights from London Stansted Airport to San Francisco from $545

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 12/2. 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
1 adult, Economy, 0 bags

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
9:20 pm - 2:30 pm
STN
-
SFO
25h 10m
2 stops
Multiple Airlines Logo
4:30 pm - 12:10 am
SFO
-
STN
23h 40m
2 stops
$607Multiple Airlines
Wed, Sep 2 - Wed, Sep 9
Multiple Airlines Logo
6:20 pm - 2:30 pm
STN
-
SFO
28h 10m
2 stops
Multiple Airlines Logo
4:30 pm - 9:30 pm
SFO
-
STN
21h 00m
2 stops
$629Multiple Airlines
Wed, Sep 2 - Wed, Sep 16
Multiple Airlines Logo
6:45 pm - 2:30 pm
STN
-
SFO
27h 45m
2 stops
Multiple Airlines Logo
4:30 pm - 8:55 pm
SFO
-
STN
20h 25m
2 stops
$635Multiple Airlines
Tue, Sep 1 - Tue, Sep 8
Multiple Airlines Logo
9:45 pm - 2:30 pm
STN
-
SFO
24h 45m
2 stops
Multiple Airlines Logo
4:30 pm - 12:55 am
SFO
-
STN
24h 25m
2 stops
$638Multiple Airlines
Tue, Sep 1 - Sat, Sep 19
Multiple Airlines Logo
10:55 am - 1:15 pm
STN
-
SFO
34h 20m
2 stops
Multiple Airlines Logo
3:15 pm - 12:55 am
SFO
-
STN
25h 40m
2 stops
$655Multiple Airlines
Thu, Sep 10 - Mon, Sep 21
Multiple Airlines Logo
9:20 pm - 2:30 pm
STN
-
SFO
25h 10m
2 stops
Multiple Airlines Logo
4:30 pm - 12:10 am
SFO
-
STN
23h 40m
2 stops
$659Multiple Airlines
Wed, Aug 26 - Wed, Sep 2
Multiple Airlines Logo
5:20 pm - 2:30 pm
STN
-
SFO
29h 10m
2 stops
Multiple Airlines Logo
4:30 pm - 8:55 pm
SFO
-
STN
20h 25m
2 stops
$660Multiple Airlines
Tue, Sep 1 - Tue, Sep 8
Lufthansa Logo
4:25 pm - 7:00 pm
STN
-
SFO
34h 35m
1 stop
Lufthansa Logo
1:55 pm - 3:35 pm
SFO
-
STN
17h 40m
1 stop
$663Lufthansa
Wed, Sep 23 - Mon, Sep 28
Multiple Airlines Logo
3:15 pm - 2:40 pm
STN
-
SFO
31h 25m
2 stops
Multiple Airlines Logo
4:45 pm - 7:35 pm
SFO
-
STN
18h 50m
2 stops
$665Multiple Airlines
Mon, Aug 24 - Mon, Sep 7
Multiple Airlines Logo
9:20 pm - 2:30 pm
STN
-
SFO
25h 10m
2 stops
Multiple Airlines Logo
4:30 pm - 12:10 am
SFO
-
STN
23h 40m
2 stops
$672Multiple Airlines
Wed, Aug 26 - Wed, Sep 2

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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 July 16, 2026.
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

Cheapest round-trip

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Wed 9/2

9:20 pm-2:30 pm

2 stops25h 10m

San Francisco

Wed 9/9

4:30 pm-12:10 am

2 stops23h 40m

$607

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Wed 9/2

6:20 pm-2:30 pm

2 stops28h 10m

San Francisco

Wed 9/16

4:30 pm-9:30 pm

2 stops21h 00m

$629
Quickest round-trip

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Tue 9/1

6:45 pm-2:30 pm

2 stops27h 45m

San Francisco

Tue 9/8

4:30 pm-8:55 pm

2 stops20h 25m

$635

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Tue 9/1

9:45 pm-2:30 pm

2 stops24h 45m

San Francisco

Sat 9/19

4:30 pm-12:55 am

2 stops24h 25m

$638

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Thu 9/10

10:55 am-1:15 pm

2 stops34h 20m

San Francisco

Mon 9/21

3:15 pm-12:55 am

2 stops25h 40m

$655

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Wed 8/26

9:20 pm-2:30 pm

2 stops25h 10m

San Francisco

Wed 9/2

4:30 pm-12:10 am

2 stops23h 40m

$659

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Tue 9/1

5:20 pm-2:30 pm

2 stops29h 10m

San Francisco

Tue 9/8

4:30 pm-8:55 pm

2 stops20h 25m

$660

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Wed 9/23

4:25 pm-7:00 pm

1 stop34h 35m

San Francisco

Mon 9/28

1:55 pm-3:35 pm

1 stop17h 40m

$663

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Mon 8/24

3:15 pm-2:40 pm

2 stops31h 25m

San Francisco

Mon 9/7

4:45 pm-7:35 pm

2 stops18h 50m

$665

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Wed 8/26

9:20 pm-2:30 pm

2 stops25h 10m

San Francisco

Wed 9/2

4:30 pm-12:10 am

2 stops23h 40m

$672

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 $751. The most expensive day to fly to San Francisco is Sunday, with ticket prices averaging around $896.

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 at noon. Our users have found flights to San Francisco at noon for as low as $755. Flights in the morning are often more expensive with an average ticket price of $797.

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

15h 20m

Direct flights

None
The fastest flight from London Stansted Airport to San Francisco takes 15h 20m
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.
Search flight deals

Frequently asked questions about flying from London Stansted Airport to San Francisco

  • How far is London Stansted to San Francisco by plane?

    The distance between London Stansted and San Francisco is about 5341.0 mi. Typically, this will take 15h 20m 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
South San Francisco
Hayward
Fremont
Sonoma
Bodega Bay
Walnut Creek
Roseville
Santa Clara
Berkeley
Vallejo
Salinas
Sunnyvale
Burlingame
Daly City
Big Sur
Milpitas
Palo Alto

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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