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Cheap flights from Southampton to Seattle from £541

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Southampton to Seattle departing on 4/3. 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

Delta Logo
08:40 - 11:35SOU-SEA
34h 55m1 stop
Delta Logo
16:00 - 08:10SEA-SOU
33h 10m1 stop
£541Delta
Find Deal
Wed, 4 Mar - Sun, 8 Mar
Delta Logo
08:40 - 13:00SOU-SEA
36h 20m2 stops
Delta Logo
17:50 - 17:00SEA-SOU
40h 10m2 stops
£545Delta
Find Deal
Wed, 4 Mar - Sun, 8 Mar
Delta Logo
18:25 - 21:00SOU-SEA
34h 35m2 stops
Delta Logo
15:00 - 17:00SEA-SOU
18h 00m1 stop
£573Delta
Find Deal
Sun, 28 Sep - Tue, 25 Nov
KLM Logo
08:40 - 11:35SOU-SEA
34h 55m1 stop
KLM Logo
16:00 - 08:10SEA-SOU
33h 10m1 stop
£581KLM
Find Deal
Wed, 4 Mar - Sun, 8 Mar
Delta Logo
18:25 - 16:45SOU-SEA
30h 20m2 stops
Delta Logo
22:14 - 08:20SEA-SOU
26h 06m2 stops
£583Delta
Find Deal
Sun, 28 Sep - Tue, 25 Nov
Delta Logo
18:25 - 11:45SOU-SEA
25h 20m1 stop
Delta Logo
15:00 - 08:10SEA-SOU
33h 10m1 stop
£603Delta
Find Deal
Sun, 28 Sep - Sat, 29 Nov
Delta Logo
17:35 - 16:05SOU-SEA
30h 30m1 stop
Delta Logo
15:00 - 17:00SEA-SOU
18h 00m1 stop
£840Delta
Find Deal
Mon, 29 Sep - Mon, 24 Nov
Delta Logo
17:35 - 16:05SOU-SEA
30h 30m1 stop
Delta Logo
15:00 - 17:25SEA-SOU
18h 25m1 stop
£870Delta
Find Deal
Mon, 29 Sep - Sun, 30 Nov
British Airways Logo
19:55 - 17:55SOU-SEA
29h 00m2 stops
British Airways Logo
13:35 - 13:10SEA-SOU
15h 35m2 stops
£923British Airways
Find Deal
Thu, 30 Oct - Sat, 8 Nov

Delta flights from Southampton to Seattle

Our best Delta deals on Southampton to Seattle flight tickets
Delta
4 Mar
SOU08:40Southampton Eastleigh
34h 55m
1 stop
SEA11:35Seattle/Tacoma Intl
8 Mar
SEA16:00Seattle/Tacoma Intl
33h 10m
1 stop
SOU08:10Southampton Eastleigh
£541
Find similar
Delta
4 Mar
SOU08:40Southampton Eastleigh
36h 20m
2 stops
SEA13:00Seattle/Tacoma Intl
8 Mar
SEA17:50Seattle/Tacoma Intl
40h 10m
2 stops
SOU17:00Southampton Eastleigh
£545
Find similar
Delta
28 Sept
SOU18:25Southampton Eastleigh
34h 35m
2 stops
SEA21:00Seattle/Tacoma Intl
25 Nov
SEA15:00Seattle/Tacoma Intl
18h 00m
1 stop
SOU17:00Southampton Eastleigh
£573
Find similar

British Airways flights from Southampton to Seattle

Our best British Airways deals on Southampton to Seattle flight tickets
British Airways
27 Sept
SOU09:40Southampton Eastleigh
16h 10m
1 stop
SEA17:50Seattle/Tacoma Intl
24 Nov
SEA20:05Seattle/Tacoma Intl
15h 35m
1 stop
SOU19:40Southampton Eastleigh
£797
Find similar
British Airways
26 Sept
SOU20:00Southampton Eastleigh
29h 50m
1 stop
SEA17:50Seattle/Tacoma Intl
26 Nov
SEA20:05Seattle/Tacoma Intl
15h 35m
1 stop
SOU19:40Southampton Eastleigh
£805
Find similar
British Airways
27 Sept
SOU09:40Southampton Eastleigh
16h 10m
1 stop
SEA17:50Seattle/Tacoma Intl
30 Nov
SEA20:05Seattle/Tacoma Intl
15h 35m
1 stop
SOU19:40Southampton Eastleigh
£827
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 18 September 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

Wed 4/3

08:40-11:35

1 stop34h 55m

Seattle/Tacoma Intl

Sun 8/3

16:00-08:10

1 stop33h 10m

£541

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 4/3

08:40-13:00

2 stops36h 20m

Seattle/Tacoma Intl

Sun 8/3

17:50-17:00

2 stops40h 10m

£545

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 28/9

18:25-21:00

2 stops34h 35m

Seattle/Tacoma Intl

Tue 25/11

15:00-17:00

1 stop18h 00m

£573

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 4/3

08:40-11:35

1 stop34h 55m

Seattle/Tacoma Intl

Sun 8/3

16:00-08:10

1 stop33h 10m

£581

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 28/9

18:25-16:45

2 stops30h 20m

Seattle/Tacoma Intl

Tue 25/11

22:14-08:20

2 stops26h 06m

£582

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 28/9

18:25-11:45

1 stop25h 20m

Seattle/Tacoma Intl

Sat 29/11

15:00-08:10

1 stop33h 10m

£603

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 29/9

17:35-16:05

1 stop30h 30m

Seattle/Tacoma Intl

Mon 24/11

15:00-17:00

1 stop18h 00m

£840

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 29/9

17:35-16:05

1 stop30h 30m

Seattle/Tacoma Intl

Sun 30/11

15:00-17:25

1 stop18h 25m

£870

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 30/10

19:55-17:55

2 stops29h 00m

Seattle/Tacoma Intl

Sat 8/11

13:35-13:10

2 stops15h 35m

£923

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 4/1

20:00-11:30

2 stops47h 30m

£580

Flights are sorted by cheapest return flights first.

Showing 1-10 of 18 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, Wednesday is the cheapest day to fly to Seattle from Southampton. The lowest ticket price found for a Wednesday departure recently was £581. 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 £686.

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 £517. 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 £618.

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

Direct flights

None
There are no direct flights from Southampton to Seattle. There are no popular flight routes from Southampton to Seattle.
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  • 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 25h 20m.

  • 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
Fife
Tukwila
Renton
SeaTac

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.

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