When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport?

Prices for flights from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport are updated daily.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport.

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

The required travel and health documents for your Southampton Eastleigh 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 Southampton Eastleigh Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

£482 Cheap Flights from Seattle to Southampton in 2026

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Find the cheapest flights from Seattle to London

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

09:40 - 17:00

SEA

SOU

24h 20m

2 stops

08:50 - 22:15

SOU

SEA

20h 25m

2 stops

£558Delta

Thu, 12 Mar - Thu, 19 Mar

16:05 - 17:00

SEA

SOU

17h 55m

1 stop

17:20 - 11:45

SOU

SEA

26h 25m

1 stop

£585Delta

Mon, 23 Mar - Tue, 31 Mar

09:40 - 17:00

SEA

SOU

24h 20m

2 stops

18:05 - 12:35

SOU

SEA

25h 30m

1 stop

£589Delta

Thu, 12 Mar - Thu, 19 Mar

17:30 - 08:35

SEA

SOU

31h 05m

1 stop

17:20 - 16:30

SOU

SEA

31h 10m

1 stop

£595KLM

Sun, 26 Apr - Sun, 10 May

16:05 - 17:00

SEA

SOU

17h 55m

1 stop

17:20 - 11:45

SOU

SEA

26h 25m

1 stop

£597Delta

Mon, 23 Mar - Mon, 6 Apr

08:20 - 08:35

SEA

SOU

16h 15m

2 stops

17:20 - 16:30

SOU

SEA

31h 10m

1 stop

£598KLM

Sun, 26 Apr - Sun, 10 May

13:45 - 08:20

SEA

SOU

59h 35m

2 stops

09:05 - 11:45

SOU

SEA

34h 40m

1 stop

£598Delta

Sat, 21 Mar - Tue, 31 Mar

07:15 - 08:20

SEA

SOU

18h 05m

2 stops

09:05 - 16:30

SOU

SEA

15h 25m

1 stop

£601Delta

Mon, 23 Mar - Fri, 3 Apr

13:45 - 08:20

SEA

SOU

59h 35m

2 stops

17:20 - 15:50

SOU

SEA

30h 30m

2 stops

£601Delta

Sat, 21 Mar - Tue, 31 Mar

17:30 - 16:50

SEA

SOU

15h 20m

1 stop

09:15 - 22:17

SOU

SEA

21h 02m

2 stops

£602Delta

Sun, 26 Apr - Sun, 10 May

Delta flights from Seattle to Southampton

Our best Delta deals on Seattle to Southampton flight tickets

Delta

12 Mar

SEA09:40Seattle/Tacoma Intl

24h 20m

2 stops

SOU17:00Southampton Eastleigh

19 Mar

SOU08:50Southampton Eastleigh

20h 25m

2 stops

SEA22:15Seattle/Tacoma Intl

£558

Delta

23 Mar

SEA16:05Seattle/Tacoma Intl

17h 55m

1 stop

SOU17:00Southampton Eastleigh

31 Mar

SOU17:20Southampton Eastleigh

26h 25m

1 stop

SEA11:45Seattle/Tacoma Intl

£585

Delta

12 Mar

SEA09:40Seattle/Tacoma Intl

24h 20m

2 stops

SOU17:00Southampton Eastleigh

19 Mar

SOU18:05Southampton Eastleigh

25h 30m

1 stop

SEA12:35Seattle/Tacoma Intl

£589

British Airways flights from Seattle to Southampton

Our best British Airways deals on Seattle to Southampton flight tickets

British Airways

4 Feb

SEA18:50Seattle/Tacoma Intl

17h 15m

2 stops

SOU20:05Southampton Eastleigh

18 Feb

SOU12:25Southampton Eastleigh

13h 55m

1 stop

SEA18:20Seattle/Tacoma Intl

£3,900

British Airways

3 Feb

SEA13:25Seattle/Tacoma Intl

20h 05m

2 stops

SOU17:30Southampton Eastleigh

11 Feb

SOU20:30Southampton Eastleigh

28h 25m

2 stops

SEA16:55Seattle/Tacoma Intl

£4,283

Fly from

Fly to

Route

Depart

Return

Price

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Thu 12/3

09:40-17:00

2 stops24h 20m

Southampton Eastleigh

Thu 19/3

08:50-22:15

2 stops20h 25m

£558

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 23/3

16:05-17:00

1 stop17h 55m

Southampton Eastleigh

Tue 31/3

17:20-11:45

1 stop26h 25m

£585

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Thu 12/3

09:40-17:00

2 stops24h 20m

Southampton Eastleigh

Thu 19/3

18:05-12:35

1 stop25h 30m

£589

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 26/4

17:30-08:35

1 stop31h 05m

Southampton Eastleigh

Sun 10/5

17:20-16:30

1 stop31h 10m

£595

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 23/3

16:05-17:00

1 stop17h 55m

Southampton Eastleigh

Mon 6/4

17:20-11:45

1 stop26h 25m

£597

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 26/4

08:20-08:35

2 stops16h 15m

Southampton Eastleigh

Sun 10/5

17:20-16:30

1 stop31h 10m

£598

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 21/3

13:45-08:20

2 stops59h 35m

Southampton Eastleigh

Tue 31/3

09:05-11:45

1 stop34h 40m

£598

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 23/3

07:15-08:20

2 stops18h 05m

Southampton Eastleigh

Fri 3/4

09:05-16:30

1 stop15h 25m

£601

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 21/3

13:45-08:20

2 stops59h 35m

Southampton Eastleigh

Tue 31/3

17:20-15:50

2 stops30h 30m

£601

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 26/4

17:30-16:50

1 stop15h 20m

Southampton Eastleigh

Sun 10/5

09:15-22:17

2 stops21h 02m

£602

Flights are sorted by cheapest return flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle 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 airline that flies from Seattle/Tacoma Intl to Southampton Eastleigh?

Delta is the most popular carrier operating from Seattle/Tacoma Intl to Southampton Eastleigh

When to book flights from Seattle to Southampton

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Southampton according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Seattle to Southampton (SEA to SOU) flight deals and tips

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

Fastest flight time	17h 15m
Direct flights	None

The fastest flight from Seattle to Southampton takes 17h 15m

There are no direct flights from Seattle to Southampton. There are no popular flight routes from Seattle to Southampton.

Search flight deals

How far is Seattle/Tacoma Intl to Southampton Eastleigh by plane?
The distance between Seattle/Tacoma Intl and Southampton Eastleigh is about 4779.5 mi. 17h 15m is a normal flight duration for this route.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport are updated daily.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport.
What documentation or ID do you need to fly to Southampton Eastleigh Airport?
The required travel and health documents for your Southampton Eastleigh 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 Southampton Eastleigh Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Portsmouth

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Southampton from Seattle.

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

Yes. momondo enables you to select and highlight flights to Southampton from Seattle with this policy.

How can momondo help me find flights from Seattle to Southampton?

momondo provides multiple filters to help you find the best flight to Southampton from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Southampton from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.