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Cheap flights from Southampton to Seattle from £502

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 23/3. 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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0 bags
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Find the cheapest flights from Southampton to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
Delta Logo
09:05 - 16:30
SOU
-
SEA
15h 25m
1 stop
Delta Logo
13:45 - 16:50
SEA
-
SOU
19h 05m
1 stop
£675Delta
Mon, 20 Apr - Tue, 28 Apr
Delta Logo
17:20 - 11:45
SOU
-
SEA
26h 25m
1 stop
Delta Logo
07:15 - 16:50
SEA
-
SOU
25h 35m
2 stops
£705Delta
Fri, 17 Apr - Thu, 23 Apr
Delta Logo
17:20 - 11:45
SOU
-
SEA
26h 25m
1 stop
Delta Logo
07:15 - 16:50
SEA
-
SOU
25h 35m
2 stops
£709Delta
Sun, 19 Apr - Tue, 28 Apr
Delta Logo
17:20 - 14:42
SOU
-
SEA
29h 22m
2 stops
Delta Logo
09:00 - 16:50
SEA
-
SOU
23h 50m
2 stops
£709Delta
Fri, 17 Apr - Thu, 23 Apr
Delta Logo
17:20 - 11:45
SOU
-
SEA
26h 25m
1 stop
Delta Logo
09:00 - 08:45
SEA
-
SOU
15h 45m
2 stops
£735Delta
Fri, 17 Apr - Fri, 24 Apr
Delta Logo
09:05 - 16:30
SOU
-
SEA
15h 25m
1 stop
Delta Logo
15:35 - 08:35
SEA
-
SOU
33h 00m
2 stops
£739Delta
Thu, 23 Apr - Sat, 25 Apr
Delta Logo
17:20 - 11:45
SOU
-
SEA
26h 25m
1 stop
Delta Logo
15:35 - 08:35
SEA
-
SOU
33h 00m
2 stops
£743Delta
Sun, 19 Apr - Sat, 25 Apr
British Airways Logo
12:25 - 18:20
SOU
-
SEA
13h 55m
1 stop
British Airways Logo
21:05 - 19:40
SEA
-
SOU
15h 35m
1 stop
£758British Airways
Wed, 4 Mar - Sun, 8 Mar
British Airways Logo
12:25 - 18:20
SOU
-
SEA
13h 55m
1 stop
British Airways Logo
21:05 - 19:40
SEA
-
SOU
15h 35m
1 stop
£759British Airways
Wed, 4 Mar - Sun, 8 Mar
British Airways Logo
12:25 - 18:20
SOU
-
SEA
13h 55m
1 stop
British Airways Logo
19:50 - 08:10
SEA
-
SOU
29h 20m
2 stops
£768British Airways
Wed, 4 Mar - Sun, 8 Mar

British Airways flights from Southampton to Seattle

Our best British Airways deals on Southampton to Seattle flight tickets
British Airways
4 Mar
SOU12:25Southampton Eastleigh
13h 55m
1 stop
SEA18:20Seattle/Tacoma Intl
8 Mar
SEA21:05Seattle/Tacoma Intl
15h 35m
1 stop
SOU19:40Southampton Eastleigh
£758
British Airways
4 Mar
SOU12:25Southampton Eastleigh
13h 55m
1 stop
SEA18:20Seattle/Tacoma Intl
8 Mar
SEA21:05Seattle/Tacoma Intl
15h 35m
1 stop
SOU19:40Southampton Eastleigh
£759
British Airways
4 Mar
SOU12:25Southampton Eastleigh
13h 55m
1 stop
SEA18:20Seattle/Tacoma Intl
8 Mar
SEA19:50Seattle/Tacoma Intl
29h 20m
2 stops
SOU08:10Southampton Eastleigh
£768

Delta flights from Southampton to Seattle

Our best Delta deals on Southampton to Seattle flight tickets
Delta
20 Apr
SOU09:05Southampton Eastleigh
15h 25m
1 stop
SEA16:30Seattle/Tacoma Intl
28 Apr
SEA13:45Seattle/Tacoma Intl
19h 05m
1 stop
SOU16:50Southampton Eastleigh
£675
Delta
17 Apr
SOU17:20Southampton Eastleigh
26h 25m
1 stop
SEA11:45Seattle/Tacoma Intl
23 Apr
SEA07:15Seattle/Tacoma Intl
25h 35m
2 stops
SOU16:50Southampton Eastleigh
£705
Delta
19 Apr
SOU17:20Southampton Eastleigh
31h 10m
1 stop
SEA16:30Seattle/Tacoma Intl
28 Apr
SEA13:45Seattle/Tacoma Intl
19h 05m
1 stop
SOU16:50Southampton Eastleigh
£709

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 3 February 2026.
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

Mon 20/4

09:05-16:30

1 stop15h 25m

Seattle/Tacoma Intl

Tue 28/4

13:45-16:50

1 stop19h 05m

£675

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 17/4

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Thu 23/4

07:15-16:50

2 stops25h 35m

£705

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 19/4

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Tue 28/4

07:15-16:50

2 stops25h 35m

£709

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 17/4

17:20-14:42

2 stops29h 22m

Seattle/Tacoma Intl

Thu 23/4

09:00-16:50

2 stops23h 50m

£709

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 17/4

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Fri 24/4

09:00-08:45

2 stops15h 45m

£735

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 23/4

09:05-16:30

1 stop15h 25m

Seattle/Tacoma Intl

Sat 25/4

15:35-08:35

2 stops33h 00m

£739

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 19/4

17:20-11:45

1 stop26h 25m

Seattle/Tacoma Intl

Sat 25/4

15:35-08:35

2 stops33h 00m

£743

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 4/3

12:25-18:20

1 stop13h 55m

Seattle/Tacoma Intl

Sun 8/3

21:05-19:40

1 stop15h 35m

£758

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 4/3

12:25-18:20

1 stop13h 55m

Seattle/Tacoma Intl

Sun 8/3

21:05-19:40

1 stop15h 35m

£759

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 4/3

12:25-18:20

1 stop13h 55m

Seattle/Tacoma Intl

Sun 8/3

19:50-08:10

2 stops29h 20m

£768

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, Wednesday is the cheapest day to fly to Seattle from Southampton. The lowest ticket price found for a Wednesday departure recently was £574. 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 £642.

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 morning. momondo users have found flights departing from Southampton to Seattle in the morning for as low as £599. 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 £609.

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

Fastest flight time

13h 55m

Direct flights

None
The fastest flight from Southampton to Seattle takes 13h 55m
There are no direct flights from Southampton to Seattle. There are no popular flight routes from Southampton to Seattle.
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 13h 55m.

  • 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
SeaTac
Tukwila

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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