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$296+ Cheap flights from Seattle (SEA) to Southampton (SOU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOU
Apr 12 — Apr 191
Sun 4/12
Sun 4/19
1 adult, Economy
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Cheap flight deals from Seattle to Southampton

Cheapest flights from Seattle to Southampton
Explore the most affordable flight options available from Seattle to Southampton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 13, 2026.

This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/301:50 pm
SEA
-
SOU
1 stop19h 00m
Delta
Tue 9/155:20 pm
SOU
-
SEA
1 stop31h 15m
Delta
Deal found 3/13$951
This Delta deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/319:30 am
SEA
-
SOU
2 stops23h 20m
Delta
Wed 9/169:05 am
SOU
-
SEA
1 stop15h 30m
Delta
Deal found 3/10$955
This Kiwi.com deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/263:40 pm
SEA
-
SOU
2 stops18h 00m
Multiple Airlines
Sun 5/35:20 pm
SOU
-
SEA
1 stop31h 50m
Multiple Airlines
Deal found 3/12$995
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/301:50 pm
SEA
-
SOU
1 stop34h 45m
Delta
Sun 9/135:20 pm
SOU
-
SEA
1 stop26h 27m
Delta
Deal found 3/13$1,001
This Delta deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:20 am
SEA
-
SOU
2 stops25h 30m
Delta
Sun 9/135:20 pm
SOU
-
SEA
1 stop26h 27m
Delta
Deal found 3/10$1,005
This KLM deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:40 pm
SEA
-
SOU
1 stop30h 55m
KLM
Wed 6/39:05 am
SOU
-
SEA
1 stop34h 32m
KLM
Deal found 3/12$1,011
This Delta deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:30 am
SEA
-
SOU
2 stops19h 05m
Delta
Wed 6/39:05 am
SOU
-
SEA
2 stops21h 40m
Delta
Deal found 3/12$1,026
This Delta deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:40 pm
SEA
-
SOU
1 stop30h 55m
Delta
Wed 9/169:05 am
SOU
-
SEA
1 stop15h 30m
Delta
Deal found 3/10$1,036
This Delta deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/17:20 am
SEA
-
SOU
2 stops17h 15m
Delta
Tue 9/159:05 am
SOU
-
SEA
1 stop34h 42m
Delta
Deal found 3/10$1,040

Find flight deals from Seattle to Southampton

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Southampton (SOU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$951
(Delta)

One-way from

$296
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$688
Provider with most accurate pricing for Seattle/Tacoma Intl-Southampton Eastleigh flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Southampton Eastleigh flights.
Search Deals
From Seattle/Tacoma Intl to Southampton Eastleigh
Search Deals
One-way flight from Seattle/Tacoma Intl to Southampton Eastleigh
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($126 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Southampton 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, Cheapflights users made 2,558,603 searches. Data last updated March 13, 2026.
Use the filters below to find and compare flights from Seattle to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 8/31

5:45 pm-4:50 pm

1 stop15h 05m

Southampton Eastleigh

Wed 9/16

9:05 am-4:35 pm

1 stop15h 30m

$951

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 5/13

5:40 pm-8:35 am

1 stop30h 55m

Southampton Eastleigh

Wed 6/3

9:05 am-11:37 am

1 stop34h 32m

$1,011

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 8/31

5:45 pm-8:35 am

1 stop30h 50m

Southampton Eastleigh

Tue 9/15

5:20 pm-11:47 am

1 stop26h 27m

$1,016

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 5/13

5:30 am-8:35 am

2 stops19h 05m

Southampton Eastleigh

Wed 6/3

9:05 am-10:45 pm

2 stops21h 40m

$1,026

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 9/1

7:20 am-8:35 am

2 stops17h 15m

Southampton Eastleigh

Tue 9/15

9:05 am-11:47 am

1 stop34h 42m

$1,040

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 4/26

6:00 am-8:35 am

2 stops18h 35m

Southampton Eastleigh

Sun 5/3

9:15 am-10:31 pm

2 stops21h 16m

$1,059

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Fri 4/24

6:00 am-8:45 am

2 stops18h 45m

Southampton Eastleigh

Fri 5/1

9:05 am-10:31 pm

2 stops21h 26m

$1,059

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Fri 4/24

1:45 pm-8:45 am

1 stop35h 00m

Southampton Eastleigh

Fri 5/1

5:20 pm-11:45 am

1 stop26h 25m

$1,094

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 8/30

1:50 pm-4:50 pm

1 stop19h 00m

Southampton Eastleigh

Thu 9/17

5:20 pm-11:47 am

1 stop26h 27m

$1,118

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Fri 8/28

5:45 pm-8:45 am

1 stop31h 00m

Southampton Eastleigh

Wed 9/16

9:05 am-11:47 am

1 stop34h 42m

$1,126

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 19 resultsSorted by cheapest first
1
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Compare providers for flights from Seattle to Southampton

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Southampton in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Southampton flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Southampton flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Southampton flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Southampton flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Southampton flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Southampton

What is the cheapest month to book a flight from Seattle to Southampton?

Currently, February is the cheapest month in which you can book a flight from Seattle to Southampton (average of $494). Flying from Seattle to Southampton in June is currently the most expensive (average of $756). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Southampton. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Southampton?

    Departing from Seattle to Southampton will take you 15h 05m. Airlines will cover a distance of 4787 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Seattle to Southampton that include hotel bookings?

    Yes. In addition to deals on Seattle to Southampton flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Southampton?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Southampton.

  • Can I find deals for business class flights from Seattle to Southampton?

    Yes. Cheapflights offers flight deals from Seattle to Southampton by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Southampton?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Southampton (average of $494). Flying from Seattle to Southampton in June is currently the most expensive (average of $756). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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