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$377+ Cheap flights from Southampton (SOU) to Seattle (SEA)

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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap flight deals from Southampton to Seattle

Cheapest flights from Southampton to Seattle
Explore the most affordable flight options available from Southampton to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 27, 2026.

This British Airways deal was found by Cheapflights users on 1/26. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/412:25 pm
SOU
-
SEA
1 stop13h 55m
British Airways
Sun 3/89:05 pm
SEA
-
SOU
1 stop15h 35m
British Airways
Deal found 1/26$718
This Expedia deal was found by Cheapflights users on 1/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/135:35 pm
SOU
-
SEA
2 stops28h 32m
Multiple Airlines
Fri 3/2010:25 pm
SEA
-
SOU
2 stops35h 50m
Multiple Airlines
Deal found 1/27$871
This TravelUp deal was found by Cheapflights users on 1/27. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1112:25 pm
SOU
-
SEA
1 stop13h 55m
Aer Lingus
Tue 3/1712:07 am
SEA
-
SOU
2 stops25h 38m
Aer Lingus
Deal found 1/27$4,569

Find flight deals from Southampton to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Southampton (SOU) to Seattle (SEA). 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 January 27, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$687
(Expedia)

One-way from

$575
(Gurufare)

Popular in

July

Cheapest in

February

Average price

$644
Provider with most accurate pricing for Southampton Eastleigh-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Southampton Eastleigh-Seattle/Tacoma Intl flights.
Search Deals
From Southampton Eastleigh to Seattle/Tacoma Intl
Search Deals
One-way flight from Southampton Eastleigh to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($108 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize 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, Cheapflights users made 2,558,603 searches. Data last updated January 27, 2026.
Use the filters below to find and compare flights from Southampton to Seattle that are best for you.

Fly from

Southampton

Fly to

Seattle

Route

Depart

Return

Price

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 3/4

12:25 pm-6:20 pm

1 stop13h 55m

Seattle/Tacoma Intl

Sun 3/8

9:05 pm-7:40 pm

1 stop15h 35m

$718

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 3/13

5:35 pm-3:07 pm

2 stops28h 32m

Seattle/Tacoma Intl

Fri 3/20

10:25 pm-5:15 pm

2 stops35h 50m

$871

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 3/11

12:25 pm-7:20 pm

1 stop13h 55m

Seattle/Tacoma Intl

Tue 3/17

12:07 am-8:45 am

2 stops25h 38m

$4,569

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 4/20

7:20 pm-7:25 pm

3 stops32h 05m

$377

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 3/23

9:30 am-7:20 pm

1 stop16h 50m

$582

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 4/20

8:00 pm-5:10 pm

1 stop29h 10m

$584

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 6/23

9:10 am-5:10 pm

1 stop16h 00m

$775

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 6/21

8:45 pm-11:35 am

2 stops22h 50m

$780

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 6/18

9:10 am-5:10 pm

1 stop16h 00m

$820

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 6/12

6:50 am-6:25 pm

2 stops19h 35m

$825

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

  • Most accurate provider: When it comes to deals on Southampton-Seattle flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Southampton-Seattle flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Southampton-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Southampton-Seattle flights, Cheapflights users trust Expedia the most. Expedia 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 Southampton-Seattle 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 Southampton to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Southampton 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 Southampton to Seattle

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

Currently, March is the cheapest month in which you can book a flight from Southampton to Seattle (average of $407). Flying from Southampton to Seattle in August is currently the most expensive (average of $617). 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 Southampton to Seattle. 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 Southampton to Seattle?

    British Airways and Delta can get you from Southampton to Seattle in just under 13h 55m. Your travel time can differ by up to 6h 30m. The distance between Southampton and Seattle is about 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 Southampton to Seattle that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Southampton to Seattle 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 Southampton to Seattle?

    Currently, March is the cheapest month in which you can book a flight from Southampton to Seattle (average of $407). Flying from Southampton to Seattle in August is currently the most expensive (average of $617). 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.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Renton
Puyallup
Kirkland
Kent
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

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