How often are flights from London to San Francisco delayed?

Historically, on average around 33% of flights between London and San Francisco have experienced a delay on any given week. The average delay length over the past 12 months has been 57 minutes.

What is the most punctual flight time for London to San Francisco flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Friday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

What is the cheapest airline that flies from London Stansted to San Francisco?

Turkish Airlines is the most popular carrier operating from London Stansted to San Francisco

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 were last updated today.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Stansted Airport to San Francisco Airport.

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

The necessary travel and health documents for your San Francisco Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£448 Cheap Flights from London Stansted Airport to San Francisco in 2026

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Find the cheapest flights from London Stansted Airport to San Francisco

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

15:10 - 14:40

STN

SFO

31h 30m

2 stops

16:45 - 20:55

SFO

STN

20h 10m

2 stops

£553Multiple Airlines

Tue, 1 Sep - Tue, 15 Sep

15:15 - 14:40

STN

SFO

31h 25m

2 stops

16:45 - 19:35

SFO

STN

18h 50m

2 stops

£560Multiple Airlines

Mon, 31 Aug - Mon, 7 Sep

11:35 - 14:40

STN

SFO

35h 05m

2 stops

16:45 - 21:20

SFO

STN

20h 35m

2 stops

£571Multiple Airlines

Tue, 25 Aug - Tue, 1 Sep

06:30 - 21:55

STN

SFO

23h 25m

3 stops

06:00 - 22:40

SFO

STN

32h 40m

3 stops

£574Multiple Airlines

Tue, 1 Sep - Tue, 15 Sep

13:35 - 11:45

STN

SFO

30h 10m

2 stops

15:05 - 19:50

SFO

STN

20h 45m

2 stops

£580Multiple Airlines

Mon, 28 Sep - Mon, 12 Oct

13:10 - 14:40

STN

SFO

33h 30m

2 stops

16:45 - 21:20

SFO

STN

20h 35m

2 stops

£581Multiple Airlines

Wed, 26 Aug - Mon, 31 Aug

06:30 - 12:20

STN

SFO

37h 50m

2 stops

17:35 - 21:20

SFO

STN

19h 45m

1 stop

£583Multiple Airlines

Tue, 18 Aug - Mon, 24 Aug

22:05 - 14:30

STN

SFO

24h 25m

2 stops

16:30 - 23:05

SFO

STN

22h 35m

2 stops

£585Multiple Airlines

Sun, 30 Aug - Sun, 13 Sep

06:30 - 21:55

STN

SFO

23h 25m

3 stops

06:00 - 22:40

SFO

STN

32h 40m

3 stops

£587Multiple Airlines

Thu, 27 Aug - Tue, 1 Sep

22:00 - 21:55

STN

SFO

31h 55m

3 stops

06:40 - 12:30

SFO

STN

21h 50m

3 stops

£592Multiple Airlines

Tue, 25 Aug - Tue, 1 Sep

momondo Fare Finder

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 return flight

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Tue 1/9

15:10-14:40

2 stops31h 30m

San Francisco

Tue 15/9

16:45-20:55

2 stops20h 10m

£553

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Mon 31/8

15:15-14:40

2 stops31h 25m

San Francisco

Mon 7/9

16:45-19:35

2 stops18h 50m

£560

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Tue 25/8

11:35-14:40

2 stops35h 05m

San Francisco

Tue 1/9

16:45-21:20

2 stops20h 35m

£571

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Tue 1/9

06:30-21:55

3 stops23h 25m

San Francisco

Tue 15/9

06:00-22:40

3 stops32h 40m

£574

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Mon 28/9

13:35-11:45

2 stops30h 10m

San Francisco

Mon 12/10

15:05-19:50

2 stops20h 45m

£580

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Wed 26/8

13:10-14:40

2 stops33h 30m

San Francisco

Mon 31/8

16:45-21:20

2 stops20h 35m

£581

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Tue 18/8

06:30-12:20

2 stops37h 50m

San Francisco

Mon 24/8

17:35-21:20

1 stop19h 45m

£583

Fastest return journey

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Sun 30/8

22:05-14:30

2 stops24h 25m

San Francisco

Sun 13/9

16:30-23:05

2 stops22h 35m

£585

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Thu 27/8

06:30-21:55

3 stops23h 25m

San Francisco

Tue 1/9

06:00-22:40

3 stops32h 40m

£587

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Tue 25/8

22:00-21:55

3 stops31h 55m

San Francisco

Tue 1/9

06:40-12:30

3 stops21h 50m

£592

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Delays

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

The cheapest day to depart on your flight to San Francisco is on a Wednesday when prices can be found for as low as £594. This is often the case because there is less demand to fly during this day of the week. Flights from London Stansted Airport to San Francisco on a Sunday will generally be more expensive and average around £707. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to San Francisco is in the morning. Flights from London Stansted Airport to San Francisco during this time can be as low as £590. Try not to purchase tickets at midday because they tend to be around £803. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 return 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	16h 46m
Direct flights	None

The fastest flight from London Stansted Airport to San Francisco takes 16h 46m

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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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. In terms of flight time, this usually takes a little over 16h 46m.
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 were last updated today.
How old do you have to be to fly from London Stansted Airport to San Francisco Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Stansted Airport to San Francisco Airport.
What documentation or ID do you need to fly to San Francisco Airport?
The necessary travel and health documents for your San Francisco Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Sunnyvale

Santa Cruz

Rohnert Park

Windsor

Big Sur

South San Francisco

Capitola

Newark

Sausalito

San Bruno

Woodland

Campbell

Palo Alto

Pacific Grove

Seaside

Aptos

Roseville

Burlingame

Novato

Mill Valley

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to San Francisco . Millions of users trust and use momondo every year so you are in good hands.

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

Flights from London to San Francisco with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential London to San Francisco flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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 simply researching potential flights to San Francisco, momondo offers a useful price alert feature which will track prices for flights to San Francisco from London and alert you when they change.