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$784+ Cheap flights from Southampton (SOU) to Seattle (SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$784
(Delta)

Popular in

August

Cheapest in

January

Average price

$693
From Southampton Eastleigh to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($108 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This Delta deal was found by Cheapflights users on 9/9. 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 11/26:05 pmSOU - SEA
2 stops28h 36mDelta
Sat 11/85:55 pmSEA - SOU
2 stops39h 30mDelta
Deal found 9/9$855
This British Airways deal was found by Cheapflights users on 9/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/249:10 amSOU - SEA
1 stop16h 40mBritish Airways
Wed 10/17:35 pmSEA - SOU
1 stop15h 55mBritish Airways
Deal found 9/10$910
This British Airways deal was found by Cheapflights users on 9/9. 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.
Sat 11/19:40 amSOU - SEA
2 stops15h 15mBritish Airways
Thu 11/66:50 pmSEA - SOU
2 stops33h 05mBritish Airways
Deal found 9/9$1,011
This British Airways deal was found by Cheapflights users on 9/9. 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.
Sat 11/19:40 amSOU - SEA
2 stops15h 15mBritish Airways
Fri 11/78:05 pmSEA - SOU
1 stop28h 40mBritish Airways
Deal found 9/9$1,017
This British Airways deal was found by Cheapflights users on 9/9. 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.
Tue 9/239:10 amSOU - SEA
1 stop16h 40mBritish Airways
Tue 9/307:35 pmSEA - SOU
1 stop15h 55mBritish Airways
Deal found 9/9$1,035
This British Airways deal was found by Cheapflights users on 9/9. 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.
Sat 11/19:40 amSOU - SEA
2 stops15h 15mBritish Airways
Sat 11/81:35 pmSEA - SOU
2 stops20h 15mBritish Airways
Deal found 9/9$1,063
This Delta deal was found by Cheapflights users on 9/9. 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 11/29:30 amSOU - SEA
2 stops19h 15mDelta
Fri 11/711:55 pmSEA - SOU
2 stops24h 55mDelta
Deal found 9/9$1,072
This Delta deal was found by Cheapflights users on 9/9. 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.
Sat 11/19:25 amSOU - SEA
1 stop34h 20mDelta
Sat 11/811:15 amSEA - SOU
2 stops46h 10mDelta
Deal found 9/9$1,177

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 September 11, 2025.
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

8:40 am-8:47 pm

2 stops20h 07m

Seattle/Tacoma Intl

Sun 3/8

9:55 pm-8:10 am

2 stops27h 15m

$784

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 3/4

8:40 am-8:44 am

2 stops32h 04m

Seattle/Tacoma Intl

Sun 3/8

4:00 pm-8:10 am

1 stop33h 10m

$785

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 11/2

6:05 pm-2:41 pm

2 stops28h 36m

Seattle/Tacoma Intl

Sat 11/8

5:55 pm-5:25 pm

2 stops39h 30m

$855

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 9/24

9:10 am-5:50 pm

1 stop16h 40m

Seattle/Tacoma Intl

Wed 10/1

7:35 pm-7:30 pm

1 stop15h 55m

$910

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 11/1

9:40 am-5:55 pm

2 stops15h 15m

Seattle/Tacoma Intl

Thu 11/6

6:50 pm-11:55 am

2 stops33h 05m

$1,011

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 10/3

9:40 am-5:50 pm

1 stop16h 10m

$983

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

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, January is the cheapest month in which you can book a flight from Southampton to Seattle (average of $238). Flying from Southampton to Seattle in June is currently the most expensive (average of $388). 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?

    Delta and Virgin Atlantic can get you from Southampton to Seattle in just under 20h 07m. Your travel time can differ by up to 11h 57m. 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, January is the cheapest month in which you can book a flight from Southampton to Seattle (average of $238). Flying from Southampton to Seattle in June is currently the most expensive (average of $388). 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
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Lacey
Renton
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

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