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Cheap flights from San Francisco to London from $454

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 10/27. 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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Cheap round-trip flights

Delta Logo
1:45 pm - 8:45 amSFO-SOU
35h 00m1 stop
Delta Logo
5:35 pm - 11:45 amSOU-SFO
26h 10m1 stop
$736Delta
Find Deal
Sun, Sep 28 - Mon, Oct 6
Delta Logo
7:00 am - 8:05 amSFO-SOU
41h 05m2 stops
Delta Logo
5:30 pm - 11:50 amSOU-SFO
26h 20m1 stop
$741Delta
Find Deal
Wed, Nov 19 - Tue, Dec 2
Delta Logo
1:55 pm - 5:00 pmSFO-SOU
19h 05m1 stop
Delta Logo
5:30 pm - 11:50 amSOU-SFO
26h 20m1 stop
$745Delta
Find Deal
Tue, Feb 3 - Thu, Feb 12
Delta Logo
7:00 am - 8:05 amSFO-SOU
41h 05m2 stops
Delta Logo
5:30 pm - 3:57 pmSOU-SFO
30h 27m2 stops
$751Delta
Find Deal
Wed, Nov 19 - Tue, Dec 2
Delta Logo
1:55 pm - 5:00 pmSFO-SOU
19h 05m1 stop
Delta Logo
5:30 pm - 11:50 amSOU-SFO
26h 20m1 stop
$754Delta
Find Deal
Tue, Jan 13 - Thu, Jan 22
Delta Logo
11:57 pm - 8:45 amSFO-SOU
24h 48m2 stops
Delta Logo
9:20 am - 11:45 amSOU-SFO
34h 25m1 stop
$759Delta
Find Deal
Sun, Sep 28 - Mon, Oct 6
Delta Logo
1:55 pm - 5:00 pmSFO-SOU
19h 05m1 stop
Delta Logo
9:00 am - 10:47 pmSOU-SFO
21h 47m2 stops
$764Delta
Find Deal
Wed, Jan 14 - Fri, Jan 23
Delta Logo
1:55 pm - 5:00 pmSFO-SOU
19h 05m1 stop
Delta Logo
6:05 pm - 11:50 amSOU-SFO
25h 45m1 stop
$766Delta
Find Deal
Mon, Nov 24 - Mon, Dec 1
Delta Logo
1:55 pm - 5:00 pmSFO-SOU
19h 05m1 stop
Delta Logo
6:05 pm - 11:50 amSOU-SFO
25h 45m1 stop
$767Delta
Find Deal
Mon, Nov 24 - Mon, Dec 1
Aer Lingus Logo
6:20 pm - 8:45 amSFO-SOU
31h 25m1 stop
Aer Lingus Logo
9:30 am - 3:35 pmSOU-SFO
14h 05m1 stop
$942Aer Lingus
Find Deal
Fri, Oct 31 - Fri, Nov 7

Delta flights from San Francisco to Southampton

Our best Delta deals on San Francisco to Southampton flight tickets
Delta
Sep 28
SFO1:45 pmSan Francisco
35h 00m
1 stop
SOU8:45 amSouthampton Eastleigh
Oct 6
SOU5:35 pmSouthampton Eastleigh
26h 10m
1 stop
SFO11:45 amSan Francisco
$736
Find similar
Delta
Nov 19
SFO7:00 amSan Francisco
41h 05m
2 stops
SOU8:05 amSouthampton Eastleigh
Dec 2
SOU5:30 pmSouthampton Eastleigh
26h 20m
1 stop
SFO11:50 amSan Francisco
$741
Find similar
Delta
Feb 3
SFO1:55 pmSan Francisco
19h 05m
1 stop
SOU5:00 pmSouthampton Eastleigh
Feb 12
SOU5:30 pmSouthampton Eastleigh
26h 20m
1 stop
SFO11:50 amSan Francisco
$745
Find similar

British Airways flights from San Francisco to Southampton

Our best British Airways deals on San Francisco to Southampton flight tickets
British Airways
Oct 1
SFO9:00 amSan Francisco
19h 05m
2 stops
SOU12:05 pmSouthampton Eastleigh
Oct 15
SOU9:10 amSouthampton Eastleigh
14h 45m
1 stop
SFO3:55 pmSan Francisco
$2,252
Find similar
British Airways
Sep 30
SFO6:30 amSan Francisco
25h 50m
2 stops
SOU4:20 pmSouthampton Eastleigh
Oct 7
SOU9:10 amSouthampton Eastleigh
14h 45m
1 stop
SFO3:55 pmSan Francisco
$2,261
Find similar
British Airways
Sep 29
SFO6:30 amSan Francisco
21h 35m
2 stops
SOU12:05 pmSouthampton Eastleigh
Oct 6
SOU9:40 amSouthampton Eastleigh
14h 15m
1 stop
SFO3:55 pmSan Francisco
$2,302
Find similar

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 September 19, 2025.
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

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sun 9/28

1:45 pm-8:45 am

1 stop35h 00m

Southampton Eastleigh

Mon 10/6

5:35 pm-11:45 am

1 stop26h 10m

$736

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Wed 11/19

7:00 am-8:05 am

2 stops41h 05m

Southampton Eastleigh

Tue 12/2

5:30 pm-11:50 am

1 stop26h 20m

$741

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Tue 2/3

1:55 pm-5:00 pm

1 stop19h 05m

Southampton Eastleigh

Thu 2/12

5:30 pm-11:50 am

1 stop26h 20m

$745

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Wed 11/19

7:00 am-8:05 am

2 stops41h 05m

Southampton Eastleigh

Tue 12/2

5:30 pm-3:57 pm

2 stops30h 27m

$751

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Tue 1/13

1:55 pm-5:00 pm

1 stop19h 05m

Southampton Eastleigh

Thu 1/22

5:30 pm-11:50 am

1 stop26h 20m

$754

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sun 9/28

11:57 pm-8:45 am

2 stops24h 48m

Southampton Eastleigh

Mon 10/6

9:20 am-11:45 am

1 stop34h 25m

$759

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Wed 1/14

1:55 pm-5:00 pm

1 stop19h 05m

Southampton Eastleigh

Fri 1/23

9:00 am-10:47 pm

2 stops21h 47m

$764

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Mon 11/24

1:55 pm-5:00 pm

1 stop19h 05m

Southampton Eastleigh

Mon 12/1

6:05 pm-11:50 am

1 stop25h 45m

$766

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Mon 11/24

1:55 pm-5:00 pm

1 stop19h 05m

Southampton Eastleigh

Mon 12/1

6:05 pm-11:50 am

1 stop25h 45m

$767

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Fri 10/31

6:20 pm-8:45 am

1 stop31h 25m

Southampton Eastleigh

Fri 11/7

9:30 am-3:35 pm

1 stop14h 05m

$942

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

What is the cheapest day to depart on your flight to Southampton?

On average, the least expensive day to fly to Southampton from San Francisco is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $979. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from San Francisco to Southampton for around $1,217.

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

Flying to Southampton from San Francisco at noon is the least expensive time of day to depart. momondo users have found prices as low as $982 when looking at flights departing at noon. Flights to Southampton are more costly in the evening, with an average ticket price of $1,199. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

You could potentially save up to 19% 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

Direct flights

None
There are no direct flights from San Francisco to Southampton. There are no popular flight routes from San Francisco to Southampton.
Search flight deals

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

    There are 5341.1 mi between San Francisco and Southampton Eastleigh. By plane, this route typically takes 17h 05m.

  • 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
KLMPriceFrom $839Free CancellationRating
7.8
1,386 reviews
Search KLM flights
Aer LingusPriceFrom $946Free CancellationRating
7.2
1,281 reviews
Search Aer Lingus 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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