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Cheap flights from Southampton to Seattle from £485

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Southampton to Seattle departing on 7/9. 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 return flights

Logo
09:40 - 17:50SOU-SEA
16h 10m2 stops
Logo
15:45 - 09:10SEA-SOU
33h 25m2 stops
£644
Find Deal
Sat, 13 Sep - Sat, 20 Sep
KLM Logo
17:35 - 11:45SOU-SEA
26h 10m1 stop
KLM Logo
13:55 - 08:50SEA-SOU
34h 55m1 stop
£667KLM
Find Deal
Fri, 5 Sep - Sun, 7 Sep
KLM Logo
09:20 - 16:05SOU-SEA
14h 45m1 stop
KLM Logo
09:30 - 08:45SEA-SOU
15h 15m2 stops
£670KLM
Find Deal
Fri, 5 Sep - Sun, 7 Sep
Virgin Atlantic Logo
09:20 - 23:15SOU-SEA
21h 55m2 stops
Virgin Atlantic Logo
06:00 - 08:45SEA-SOU
18h 45m2 stops
£681Virgin Atlantic
Find Deal
Fri, 5 Sep - Sun, 7 Sep
KLM Logo
18:05 - 16:05SOU-SEA
30h 00m1 stop
KLM Logo
17:40 - 08:45SEA-SOU
31h 05m1 stop
£692KLM
Find Deal
Sat, 13 Sep - Sat, 20 Sep
Logo
08:25 - 17:50SOU-SEA
17h 25m2 stops
Logo
19:00 - 09:10SEA-SOU
30h 10m3 stops
£817
Find Deal
Sat, 13 Sep - Sat, 20 Sep
Logo
09:20 - 20:29SOU-SEA
43h 09m3 stops
Logo
12:00 - 08:45SEA-SOU
36h 45m3 stops
£848
Find Deal
Sat, 13 Sep - Sat, 20 Sep
Logo
09:40 - 22:16SOU-SEA
20h 36m3 stops
Logo
08:40 - 19:25SEA-SOU
26h 45m2 stops
£929
Find Deal
Fri, 5 Sep - Sun, 7 Sep
British Airways Logo
19:55 - 11:35SOU-SEA
23h 40m2 stops
British Airways Logo
19:35 - 15:45SEA-SOU
12h 10m1 stop
£1,286British Airways
Find Deal
Tue, 19 Aug - Fri, 29 Aug
British Airways Logo
09:10 - 17:50SOU-SEA
16h 40m1 stop
British Airways Logo
19:35 - 15:45SEA-SOU
12h 10m1 stop
£1,322British Airways
Find Deal
Tue, 19 Aug - Fri, 29 Aug

British Airways flights from Southampton to Seattle

Our best British Airways deals on Southampton to Seattle flight tickets
British Airways
19 Aug
SOU19:55Southampton Eastleigh
23h 40m
2 stops
SEA11:35Seattle/Tacoma Intl
29 Aug
SEA19:35Seattle/Tacoma Intl
12h 10m
1 stop
SOU15:45Southampton Eastleigh
£1,286
Find similar
British Airways
19 Aug
SOU09:10Southampton Eastleigh
16h 40m
1 stop
SEA17:50Seattle/Tacoma Intl
29 Aug
SEA19:35Seattle/Tacoma Intl
12h 10m
1 stop
SOU15:45Southampton Eastleigh
£1,322
Find similar
British Airways
3 Aug
SOU19:55Southampton Eastleigh
23h 40m
2 stops
SEA11:35Seattle/Tacoma Intl
11 Aug
SEA19:35Seattle/Tacoma Intl
15h 55m
1 stop
SOU19:30Southampton Eastleigh
£1,371
Find similar

KLM flights from Southampton to Seattle

Our best KLM deals on Southampton to Seattle flight tickets
KLM
5 Sept
SOU17:35Southampton Eastleigh
26h 10m
1 stop
SEA11:45Seattle/Tacoma Intl
7 Sept
SEA13:55Seattle/Tacoma Intl
34h 55m
1 stop
SOU08:50Southampton Eastleigh
£667
Find similar
KLM
5 Sept
SOU09:20Southampton Eastleigh
14h 45m
1 stop
SEA16:05Seattle/Tacoma Intl
7 Sept
SEA09:30Seattle/Tacoma Intl
15h 15m
2 stops
SOU08:45Southampton Eastleigh
£670
Find similar
KLM
13 Sept
SOU18:05Southampton Eastleigh
30h 00m
1 stop
SEA16:05Seattle/Tacoma Intl
20 Sept
SEA17:40Seattle/Tacoma Intl
31h 05m
1 stop
SOU08:45Southampton Eastleigh
£692
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Southampton to Seattle 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 279,928 searches. Data last updated 1 August 2025.
Use the filters below to find and compare flights from Southampton to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 13/9

09:40-17:50

2 stops16h 10m

Seattle/Tacoma Intl

Sat 20/9

15:45-09:10

2 stops33h 25m

£644

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 5/9

17:35-11:45

1 stop26h 10m

Seattle/Tacoma Intl

Sun 7/9

13:55-08:50

1 stop34h 55m

£667

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 5/9

09:20-16:05

1 stop14h 45m

Seattle/Tacoma Intl

Sun 7/9

09:30-08:45

2 stops15h 15m

£670

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 5/9

09:20-23:15

2 stops21h 55m

Seattle/Tacoma Intl

Sun 7/9

06:00-08:45

2 stops18h 45m

£681

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 13/9

18:05-16:05

1 stop30h 00m

Seattle/Tacoma Intl

Sat 20/9

17:40-08:45

1 stop31h 05m

£692

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 13/9

08:25-17:50

2 stops17h 25m

Seattle/Tacoma Intl

Sat 20/9

19:00-09:10

3 stops30h 10m

£817

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 13/9

09:20-20:29

3 stops43h 09m

Seattle/Tacoma Intl

Sat 20/9

12:00-08:45

3 stops36h 45m

£848

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 5/9

09:40-22:16

3 stops20h 36m

Seattle/Tacoma Intl

Sun 7/9

08:40-19:25

2 stops26h 45m

£929

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 19/8

19:55-11:35

2 stops23h 40m

Seattle/Tacoma Intl

Fri 29/8

19:35-15:45

1 stop12h 10m

£1,286

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 19/8

09:10-17:50

1 stop16h 40m

Seattle/Tacoma Intl

Fri 29/8

19:35-15:45

1 stop12h 10m

£1,322

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Southampton to Seattle

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 Seattle?

According to our data, Tuesday is the cheapest day to fly to Seattle from Southampton. The lowest ticket price found for a Tuesday departure recently was £604. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Sunday is £727.

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

According to our data, the cheapest time of day to fly to Seattle is in the evening. momondo users have found flights departing from Southampton to Seattle in the evening for as low as £533. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive, with an average ticket price of £645.

When to book flights from Southampton to Seattle

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

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

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

Best price found

£485

Fastest flight time

14h 45m

Direct flights

None

Airports in Seattle

1 airport
The best one-way flight to Seattle from Southampton in the past 72 hours is £485. The best return flight deal from Southampton to Seattle found on momondo in the last 72 hours is £644.
The fastest flight from Southampton to Seattle takes 14h 45m
There are no direct flights from Southampton to Seattle. Popular non-direct route for this connection is Southampton Eastleigh Airport - Seattle/Tacoma Intl Airport.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • How far is Southampton Eastleigh to Seattle/Tacoma Intl by plane?

    Seattle/Tacoma Intl is 4779.5 mi away from Southampton Eastleigh. By plane, this route typically takes 14h 45m.

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

    Prices for flights from Southampton Eastleigh Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

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

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Kent
SeaTac
Fife
Tukwila
Renton

Why use momondo?

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

Finding the right flight to Seattle from Southampton 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 Seattle quick and easy, saving you time and money.

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

All flight searches from Southampton to Seattle on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Southampton to Seattle 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 Southampton to Seattle right now. Can momondo alert me if prices change?

Price alerts on flights to Seattle from Southampton are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Seattle trip

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