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Cheap flights from San Francisco to London from $427

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to London departing on 8/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from San Francisco to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
1:45 pm - 4:50 pm
SFO
-
SOU
19h 05m
1 stop
Delta Logo
9:05 am - 11:45 am
SOU
-
SFO
34h 40m
1 stop
$995Delta
Tue, Sep 15 - Mon, Oct 12
Delta Logo
1:45 pm - 4:50 pm
SFO
-
SOU
19h 05m
1 stop
Delta Logo
5:30 pm - 12:45 pm
SOU
-
SFO
26h 15m
1 stop
$997Delta
Sun, Oct 11 - Mon, Oct 26
Delta Logo
9:00 pm - 8:35 am
SFO
-
SOU
27h 35m
2 stops
Delta Logo
9:05 am - 11:45 am
SOU
-
SFO
34h 40m
1 stop
$1,000Delta
Tue, Sep 15 - Mon, Oct 12
Delta Logo
6:06 am - 8:45 am
SFO
-
SOU
18h 39m
2 stops
Delta Logo
5:20 pm - 11:45 am
SOU
-
SFO
26h 25m
1 stop
$1,002Delta
Tue, Aug 25 - Mon, Sep 7
Delta Logo
1:45 pm - 4:50 pm
SFO
-
SOU
19h 05m
1 stop
Delta Logo
9:05 am - 11:41 pm
SOU
-
SFO
22h 36m
2 stops
$1,005Delta
Tue, Sep 15 - Thu, Oct 15
Delta Logo
7:00 am - 8:35 am
SFO
-
SOU
17h 35m
2 stops
Delta Logo
5:20 pm - 4:21 pm
SOU
-
SFO
31h 01m
2 stops
$1,009Delta
Wed, Sep 16 - Tue, Oct 13
KLM Logo
7:00 am - 8:35 am
SFO
-
SOU
17h 35m
2 stops
KLM Logo
9:05 am - 9:35 pm
SOU
-
SFO
20h 30m
2 stops
$1,012KLM
Wed, Sep 16 - Fri, Oct 2
Delta Logo
9:48 pm - 8:45 am
SFO
-
SOU
26h 57m
2 stops
Delta Logo
9:15 am - 11:45 am
SOU
-
SFO
34h 30m
1 stop
$1,024Delta
Sun, Aug 9 - Mon, Aug 24
Delta Logo
5:17 pm - 5:35 pm
SFO
-
SOU
16h 18m
2 stops
Delta Logo
6:05 pm - 4:51 pm
SOU
-
SFO
30h 46m
2 stops
$1,034Delta
Sun, Aug 9 - Tue, Aug 25
Delta Logo
1:45 pm - 4:50 pm
SFO
-
SOU
19h 05m
1 stop
Delta Logo
5:20 pm - 11:45 am
SOU
-
SFO
26h 25m
1 stop
$1,045Delta
Tue, Sep 15 - Sat, Oct 17

KLM flights from San Francisco to Southampton

Our best KLM deals on San Francisco to Southampton flight tickets
KLM
Aug 25
SFO7:00 amSan Francisco
17h 45m
2 stops
SOU8:45 amSouthampton Eastleigh
Sep 7
SOU5:20 pmSouthampton Eastleigh
26h 25m
1 stop
SFO11:45 amSan Francisco
$1,000
KLM
Sep 16
SFO7:00 amSan Francisco
17h 35m
2 stops
SOU8:35 amSouthampton Eastleigh
Oct 2
SOU9:05 amSouthampton Eastleigh
20h 30m
2 stops
SFO9:35 pmSan Francisco
$1,009
KLM
Sep 16
SFO7:00 amSan Francisco
17h 35m
2 stops
SOU8:35 amSouthampton Eastleigh
Oct 2
SOU9:05 amSouthampton Eastleigh
20h 30m
2 stops
SFO9:35 pmSan Francisco
$1,012

Delta flights from San Francisco to Southampton

Our best Delta deals on San Francisco to Southampton flight tickets
Delta
Sep 15
SFO1:45 pmSan Francisco
19h 05m
1 stop
SOU4:50 pmSouthampton Eastleigh
Oct 12
SOU9:05 amSouthampton Eastleigh
34h 40m
1 stop
SFO11:45 amSan Francisco
$995
Delta
Oct 11
SFO1:45 pmSan Francisco
19h 05m
1 stop
SOU4:50 pmSouthampton Eastleigh
Oct 26
SOU5:30 pmSouthampton Eastleigh
26h 15m
1 stop
SFO12:45 pmSan Francisco
$997
Delta
Aug 25
SFO6:06 amSan Francisco
18h 39m
2 stops
SOU8:45 amSouthampton Eastleigh
Sep 7
SOU5:20 pmSouthampton Eastleigh
26h 25m
1 stop
SFO11:45 amSan Francisco
$1,002

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco to Southampton 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 May 20, 2026.
Use the filters below to find and compare flights from San Francisco to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Tue 9/15

1:45 pm-4:50 pm

1 stop19h 05m

Southampton Eastleigh

Mon 10/12

9:05 am-11:45 am

1 stop34h 40m

$995

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sun 10/11

1:45 pm-4:50 pm

1 stop19h 05m

Southampton Eastleigh

Mon 10/26

5:30 pm-12:45 pm

1 stop26h 15m

$997

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Tue 9/15

9:00 pm-8:35 am

2 stops27h 35m

Southampton Eastleigh

Mon 10/12

9:05 am-11:45 am

1 stop34h 40m

$1,000

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Tue 8/25

6:06 am-8:45 am

2 stops18h 39m

Southampton Eastleigh

Mon 9/7

5:20 pm-11:45 am

1 stop26h 25m

$1,002

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Tue 9/15

1:45 pm-4:50 pm

1 stop19h 05m

Southampton Eastleigh

Thu 10/15

9:05 am-11:41 pm

2 stops22h 36m

$1,005

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Wed 9/16

7:00 am-8:35 am

2 stops17h 35m

Southampton Eastleigh

Tue 10/13

5:20 pm-4:21 pm

2 stops31h 01m

$1,009
Quickest round-trip

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Wed 9/16

7:00 am-8:35 am

2 stops17h 35m

Southampton Eastleigh

Fri 10/2

9:05 am-9:35 pm

2 stops20h 30m

$1,012

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sun 8/9

9:48 pm-8:45 am

2 stops26h 57m

Southampton Eastleigh

Mon 8/24

9:15 am-11:45 am

1 stop34h 30m

$1,024

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sun 8/9

5:17 pm-5:35 pm

2 stops16h 18m

Southampton Eastleigh

Tue 8/25

6:05 pm-4:51 pm

2 stops30h 46m

$1,034

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Tue 9/15

1:45 pm-4:50 pm

1 stop19h 05m

Southampton Eastleigh

Sat 10/17

5:20 pm-11:45 am

1 stop26h 25m

$1,045

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 London from

How to get the cheapest flight ticket from San Francisco to Southampton

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

Can stopping save me money on San Francisco to Southampton flights?

You could potentially save up to 32% on your flight if you consider stops on a San Francisco to Southampton flight.

When to book flights from San Francisco to Southampton

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

Cheap San Francisco to Southampton (SFO to SOU) flight deals and tips

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

Fastest flight time

17h 35m

Direct flights

None
The fastest flight from San Francisco to Southampton takes 17h 35m
There are no direct flights from San Francisco to Southampton. There are no popular flight routes from San Francisco to Southampton.
Search flight deals

Frequently asked questions about flying from San Francisco to Southampton

  • How far is San Francisco to Southampton Eastleigh by plane?

    There are 5341.3 mi between San Francisco and Southampton Eastleigh. By plane, this route typically takes 17h 35m.

  • When did momondo last update prices for flights from San Francisco Airport to Southampton Eastleigh Airport?

    Prices for flights from San Francisco Airport to Southampton Eastleigh Airport were last updated today.

  • How many operators does momondo search for flights from San Francisco Airport to Southampton Eastleigh Airport?

  • How old do you have to be to fly from San Francisco Airport to Southampton Eastleigh 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 San Francisco Airport to Southampton Eastleigh Airport.

  • What documentation or ID do you need to fly to Southampton Eastleigh Airport?

    The travel and health documents you'll need for your trip to Southampton Eastleigh Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Southampton Eastleigh Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from San Francisco to Southampton?

Best airlines flying from San Francisco to Southampton

Compare and see reviews for airlines that fly from San Francisco to Southampton with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $781Free CancellationRating
7.9
8,452 reviews
Search Delta flights
KLMPriceFrom $814Free CancellationRating
7.8
1,518 reviews
Search KLM flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Portsmouth

Why use momondo?

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

It is quick and easy to find San Francisco to Southampton flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Southampton that suits you.

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

Yes. All flights to Southampton from San Francisco on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo helps you find the best flight between San Francisco and Southampton by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of San Francisco to Southampton flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Southampton trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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