Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Southampton to Seattle from £557

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 24/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Southampton to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
KLM Logo
09:15 - 11:42
SOU
-
SEA
34h 27m
1 stop
KLM Logo
13:45 - 08:35
SEA
-
SOU
34h 50m
1 stop
£754KLM
Sat, 2 May - Sat, 9 May
KLM Logo
09:15 - 11:42
SOU
-
SEA
34h 27m
1 stop
KLM Logo
10:35 - 08:45
SEA
-
SOU
14h 10m
2 stops
£757KLM
Sat, 2 May - Sat, 9 May
Multiple Airlines Logo
09:15 - 20:25
SOU
-
SEA
19h 10m
2 stops
Multiple Airlines Logo
09:30 - 08:45
SEA
-
SOU
15h 15m
2 stops
£777Multiple Airlines
Sat, 2 May - Sat, 9 May
Aer Lingus Logo
20:00 - 17:10
SOU
-
SEA
29h 10m
1 stop
Aer Lingus Logo
19:10 - 19:30
SEA
-
SOU
16h 20m
1 stop
£807Aer Lingus
Tue, 31 Mar - Tue, 14 Apr
KLM Logo
09:05 - 11:45
SOU
-
SEA
34h 40m
1 stop
KLM Logo
13:30 - 16:50
SEA
-
SOU
19h 20m
2 stops
£809KLM
Tue, 31 Mar - Tue, 14 Apr
KLM Logo
09:05 - 17:38
SOU
-
SEA
16h 33m
2 stops
KLM Logo
15:35 - 16:50
SEA
-
SOU
17h 15m
2 stops
£841KLM
Tue, 31 Mar - Tue, 14 Apr
British Airways Logo
09:20 - 17:10
SOU
-
SEA
15h 50m
1 stop
British Airways Logo
20:20 - 19:25
SEA
-
SOU
15h 05m
2 stops
£842British Airways
Fri, 17 Apr - Mon, 20 Apr
Multiple Airlines Logo
20:00 - 22:02
SOU
-
SEA
34h 02m
2 stops
Multiple Airlines Logo
22:15 - 19:30
SEA
-
SOU
37h 15m
2 stops
£844Multiple Airlines
Tue, 31 Mar - Mon, 13 Apr
Multiple Airlines Logo
09:20 - 21:53
SOU
-
SEA
20h 33m
2 stops
Multiple Airlines Logo
22:15 - 08:05
SEA
-
SOU
25h 50m
2 stops
£877Multiple Airlines
Tue, 31 Mar - Mon, 13 Apr
Multiple Airlines Logo
20:00 - 17:10
SOU
-
SEA
29h 10m
1 stop
Multiple Airlines Logo
22:15 - 08:05
SEA
-
SOU
25h 50m
2 stops
£879Multiple Airlines
Tue, 31 Mar - Mon, 13 Apr

KLM flights from Southampton to Seattle

Our best KLM deals on Southampton to Seattle flight tickets
KLM
2 May
SOU09:15Southampton Eastleigh
34h 27m
1 stop
SEA11:42Seattle/Tacoma Intl
9 May
SEA13:45Seattle/Tacoma Intl
34h 50m
1 stop
SOU08:35Southampton Eastleigh
£754
KLM
2 May
SOU09:15Southampton Eastleigh
34h 27m
1 stop
SEA11:42Seattle/Tacoma Intl
9 May
SEA10:35Seattle/Tacoma Intl
14h 10m
2 stops
SOU08:45Southampton Eastleigh
£757
KLM
31 Mar
SOU09:05Southampton Eastleigh
34h 40m
1 stop
SEA11:45Seattle/Tacoma Intl
14 Apr
SEA13:30Seattle/Tacoma Intl
19h 20m
2 stops
SOU16:50Southampton Eastleigh
£809

British Airways flights from Southampton to Seattle

Our best British Airways deals on Southampton to Seattle flight tickets
British Airways
17 Apr
SOU09:20Southampton Eastleigh
15h 50m
1 stop
SEA17:10Seattle/Tacoma Intl
20 Apr
SEA20:20Seattle/Tacoma Intl
15h 05m
2 stops
SOU19:25Southampton Eastleigh
£842
British Airways
17 Apr
SOU19:55Southampton Eastleigh
23h 40m
2 stops
SEA11:35Seattle/Tacoma Intl
20 Apr
SEA20:20Seattle/Tacoma Intl
15h 05m
2 stops
SOU19:25Southampton Eastleigh
£890
British Airways
31 Mar
SOU20:00Southampton Eastleigh
29h 10m
1 stop
SEA17:10Seattle/Tacoma Intl
13 Apr
SEA19:10Seattle/Tacoma Intl
16h 20m
1 stop
SOU19:30Southampton Eastleigh
£920

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 19 March 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

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 2/5

09:15-11:42

1 stop34h 27m

Seattle/Tacoma Intl

Sat 9/5

13:45-08:35

1 stop34h 50m

£754

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 2/5

09:15-11:42

1 stop34h 27m

Seattle/Tacoma Intl

Sat 9/5

10:35-08:45

2 stops14h 10m

£757

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 2/5

09:15-20:25

2 stops19h 10m

Seattle/Tacoma Intl

Sat 9/5

09:30-08:45

2 stops15h 15m

£777

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 31/3

20:00-17:10

1 stop29h 10m

Seattle/Tacoma Intl

Tue 14/4

19:10-19:30

1 stop16h 20m

£807

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 31/3

09:05-11:45

1 stop34h 40m

Seattle/Tacoma Intl

Tue 14/4

13:30-16:50

2 stops19h 20m

£809

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 31/3

09:05-17:38

2 stops16h 33m

Seattle/Tacoma Intl

Tue 14/4

15:35-16:50

2 stops17h 15m

£841
Fastest return journey

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 17/4

09:20-17:10

1 stop15h 50m

Seattle/Tacoma Intl

Mon 20/4

20:20-19:25

2 stops15h 05m

£842

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 31/3

20:00-22:02

2 stops34h 02m

Seattle/Tacoma Intl

Mon 13/4

22:15-19:30

2 stops37h 15m

£844

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 31/3

09:20-21:53

2 stops20h 33m

Seattle/Tacoma Intl

Mon 13/4

22:15-08:05

2 stops25h 50m

£877

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 31/3

20:00-17:10

1 stop29h 10m

Seattle/Tacoma Intl

Mon 13/4

22:15-08:05

2 stops25h 50m

£879

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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 £594. 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 £673.

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 £618. 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 £632.

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

17h 30m

Direct flights

None
The fastest flight from Southampton to Seattle takes 17h 30m
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 17h 30m.

  • 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.

An easier way to manage your Seattle trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 18/4
Sat 25/4
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States