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Cheap flights from Southampton to Seattle from £418

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 13/9. 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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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.
Aer Lingus Logo
09:20 - 17:10
SOU
-
SEA
15h 50m
1 stop
Aer Lingus Logo
19:10 - 19:30
SEA
-
SOU
16h 20m
1 stop
£625Aer Lingus
Sat, 6 Jun - Fri, 12 Jun
Aer Lingus Logo
09:20 - 17:10
SOU
-
SEA
15h 50m
1 stop
Aer Lingus Logo
19:10 - 19:30
SEA
-
SOU
16h 20m
1 stop
£686Aer Lingus
Mon, 22 Jun - Mon, 29 Jun
Delta Logo
09:05 - 16:24
SOU
-
SEA
15h 19m
1 stop
Delta Logo
05:30 - 08:35
SEA
-
SOU
19h 05m
2 stops
£827Delta
Mon, 22 Jun - Mon, 29 Jun
Delta Logo
09:05 - 23:08
SOU
-
SEA
22h 03m
2 stops
Delta Logo
07:15 - 08:35
SEA
-
SOU
17h 20m
2 stops
£832Delta
Mon, 22 Jun - Mon, 29 Jun
Aer Lingus Logo
09:20 - 17:10
SOU
-
SEA
15h 50m
1 stop
Aer Lingus Logo
23:44 - 08:35
SEA
-
SOU
24h 51m
2 stops
£849Aer Lingus
Sat, 6 Jun - Fri, 12 Jun
Multiple Airlines Logo
09:20 - 21:42
SOU
-
SEA
20h 22m
2 stops
Multiple Airlines Logo
23:44 - 08:35
SEA
-
SOU
24h 51m
2 stops
£871Multiple Airlines
Sat, 6 Jun - Fri, 12 Jun
British Airways Logo
17:20 - 17:10
SOU
-
SEA
31h 50m
1 stop
British Airways Logo
19:10 - 08:40
SEA
-
SOU
29h 30m
1 stop
£887British Airways
Tue, 1 Sep - Sat, 5 Sep
British Airways Logo
20:00 - 17:10
SOU
-
SEA
29h 10m
1 stop
British Airways Logo
20:20 - 08:25
SEA
-
SOU
28h 05m
2 stops
£888British Airways
Tue, 1 Sep - Sat, 5 Sep
British Airways Logo
20:00 - 17:10
SOU
-
SEA
29h 10m
1 stop
British Airways Logo
19:10 - 08:40
SEA
-
SOU
29h 30m
1 stop
£889British Airways
Tue, 1 Sep - Sat, 5 Sep
British Airways Logo
20:00 - 17:10
SOU
-
SEA
29h 10m
1 stop
British Airways Logo
20:20 - 08:25
SEA
-
SOU
28h 05m
2 stops
£890British Airways
Tue, 1 Sep - Sat, 5 Sep

Aer Lingus flights from Southampton to Seattle

Our best Aer Lingus deals on Southampton to Seattle flight tickets
Aer Lingus
6 Jun
SOU09:20Southampton Eastleigh
15h 50m
1 stop
SEA17:10Seattle/Tacoma Intl
12 Jun
SEA19:10Seattle/Tacoma Intl
16h 20m
1 stop
SOU19:30Southampton Eastleigh
£625
Aer Lingus
22 Jun
SOU09:20Southampton Eastleigh
15h 50m
1 stop
SEA17:10Seattle/Tacoma Intl
29 Jun
SEA19:10Seattle/Tacoma Intl
16h 20m
1 stop
SOU19:30Southampton Eastleigh
£686
Aer Lingus
6 Jun
SOU09:20Southampton Eastleigh
15h 50m
1 stop
SEA17:10Seattle/Tacoma Intl
12 Jun
SEA23:44Seattle/Tacoma Intl
24h 51m
2 stops
SOU08:35Southampton Eastleigh
£849

British Airways flights from Southampton to Seattle

Our best British Airways deals on Southampton to Seattle flight tickets
British Airways
1 Sept
SOU17:20Southampton Eastleigh
31h 50m
1 stop
SEA17:10Seattle/Tacoma Intl
5 Sept
SEA19:10Seattle/Tacoma Intl
29h 30m
1 stop
SOU08:40Southampton Eastleigh
£887
British Airways
1 Sept
SOU20:00Southampton Eastleigh
29h 10m
1 stop
SEA17:10Seattle/Tacoma Intl
5 Sept
SEA20:20Seattle/Tacoma Intl
28h 05m
2 stops
SOU08:25Southampton Eastleigh
£888
British Airways
1 Sept
SOU20:00Southampton Eastleigh
29h 10m
1 stop
SEA17:10Seattle/Tacoma Intl
5 Sept
SEA19:10Seattle/Tacoma Intl
29h 30m
1 stop
SOU08:40Southampton Eastleigh
£889

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 10 May 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

Cheapest return flight
Fastest return journey

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 6/6

09:20-17:10

1 stop15h 50m

Seattle/Tacoma Intl

Fri 12/6

19:10-19:30

1 stop16h 20m

£625

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 22/6

09:20-17:10

1 stop15h 50m

Seattle/Tacoma Intl

Mon 29/6

19:10-19:30

1 stop16h 20m

£686

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 22/6

09:05-16:24

1 stop15h 19m

Seattle/Tacoma Intl

Mon 29/6

05:30-08:35

2 stops19h 05m

£827

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 22/6

09:05-23:08

2 stops22h 03m

Seattle/Tacoma Intl

Mon 29/6

07:15-08:35

2 stops17h 20m

£832

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 6/6

09:20-17:10

1 stop15h 50m

Seattle/Tacoma Intl

Fri 12/6

23:44-08:35

2 stops24h 51m

£849

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 6/6

09:20-21:42

2 stops20h 22m

Seattle/Tacoma Intl

Fri 12/6

23:44-08:35

2 stops24h 51m

£871

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 1/9

17:20-17:10

1 stop31h 50m

Seattle/Tacoma Intl

Sat 5/9

19:10-08:40

1 stop29h 30m

£887

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 1/9

20:00-17:10

1 stop29h 10m

Seattle/Tacoma Intl

Sat 5/9

20:20-08:25

2 stops28h 05m

£888

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 1/9

20:00-17:10

1 stop29h 10m

Seattle/Tacoma Intl

Sat 5/9

19:10-08:40

1 stop29h 30m

£889

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 1/9

20:00-17:10

1 stop29h 10m

Seattle/Tacoma Intl

Sat 5/9

20:20-08:25

2 stops28h 05m

£890

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, Thursday is the cheapest day to fly to Seattle from Southampton. The lowest ticket price found for a Thursday departure recently was £591. 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 £669.

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 at midday. momondo users have found flights departing from Southampton to Seattle at midday for as low as £596. 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 £626.

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

15h 50m

Direct flights

None
The fastest flight from Southampton to Seattle takes 15h 50m
There are no direct flights from Southampton to Seattle. There are no popular flight routes from Southampton to Seattle.
Search flight deals

Frequently asked questions about flying from Southampton to Seattle

  • 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 15h 50m.

  • 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
Kirkland
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.

An easier way to manage your Seattle trip

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