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Cheap flights from Southampton to Seattle from £479

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 28/12. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
15 Aug — 22 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Southampton to Seattle

Enter your travel dates to find the best prices.

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 16 July 2026.

Tue 1/909:05
SOU
-
SEA
1 stop15h 30m
Delta
Sun 13/913:50
SEA
-
SOU
1 stop19h 00m
Delta
Deal found 15/7£701
Sat 5/909:15
SOU
-
SEA
2 stops20h 45m
Delta
Sat 12/909:30
SEA
-
SOU
2 stops15h 15m
Delta
Deal found 15/7£705
Sat 22/809:20
SOU
-
SEA
1 stop15h 50m
Aer Lingus
Thu 27/819:10
SEA
-
SOU
1 stop13h 40m
Aer Lingus
Deal found 15/7£728
Sat 22/809:20
SOU
-
SEA
2 stops19h 14m
Multiple Airlines
Thu 27/823:45
SEA
-
SOU
2 stops24h 55m
Multiple Airlines
Deal found 13/7£768
Sat 22/809:15
SOU
-
SEA
2 stops20h 30m
Delta
Thu 27/813:50
SEA
-
SOU
1 stop19h 45m
Delta
Deal found 13/7£771
Sat 22/809:15
SOU
-
SEA
1 stop15h 12m
KLM
Thu 27/813:50
SEA
-
SOU
1 stop19h 45m
KLM
Deal found 13/7£803
Fri 4/906:45
SOU
-
SEA
2 stops19h 40m
British Airways
Tue 15/920:20
SEA
-
SOU
2 stops15h 05m
British Airways
Deal found 15/7£909

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 16 July 2026.

Round-trip from

£701

One-way from

£479

Popular in

December

Cheapest in

February

Average price

£626
Delta
  • Delta
  • 4/9-14/9
  • 2 total stops
  • 46h 30m total
  • Southampton to Seattle
Search Deals
British Airways
  • British Airways
  • 28/12
  • 1 total stop
  • 17h 00m total
  • Southampton to Seattle
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights 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, Cheapflights users made 858,174 searches. Data last updated 16 July 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

Mon 7/9

17:20-11:47

1 stop26h 27m

Seattle/Tacoma Intl

Mon 14/9

23:59-16:50

2 stops32h 51m

£701

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 3/9

09:05-11:47

1 stop34h 42m

Seattle/Tacoma Intl

Thu 17/9

06:00-08:35

2 stops18h 35m

£701

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 1/9

17:20-11:47

1 stop26h 27m

Seattle/Tacoma Intl

Tue 15/9

07:15-08:45

2 stops17h 30m

£701
Fastest return journey

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 5/9

09:15-16:35

1 stop15h 20m

Seattle/Tacoma Intl

Tue 15/9

17:45-16:50

1 stop15h 05m

£701

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 5/9

09:15-22:00

2 stops20h 45m

Seattle/Tacoma Intl

Thu 17/9

06:00-08:35

2 stops18h 35m

£705

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 22/8

09:20-20:34

2 stops19h 14m

Seattle/Tacoma Intl

Thu 27/8

23:45-08:40

2 stops24h 55m

£768

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 22/8

09:15-21:45

2 stops20h 30m

Seattle/Tacoma Intl

Thu 27/8

13:50-17:35

1 stop19h 45m

£771

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 22/8

09:15-16:27

1 stop15h 12m

Seattle/Tacoma Intl

Thu 27/8

13:50-17:35

1 stop19h 45m

£803
Cheapest one-way
Fastest single journey

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 28/12

09:20-18:20

1 stop17h 00m

£479

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 30/12

09:20-18:20

1 stop17h 00m

£479

Flights are sorted by cheapest return flights first.

Deals found on 14/7

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

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 return 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.

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 can get you from Southampton to Seattle in just under 26h 27m. Your travel time can differ by up to . The distance from Southampton to Seattle is about 4787 mi.

  • 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 holiday 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.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Federal Way
SeaTac

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How does Cheapflights help users find flights from Southampton to Seattle?

Deals for Southampton to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Southampton to Seattle?

Cheapflights simply makes it quick and affordable to book flights from Southampton to Seattle by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Southampton to Seattle with no change fees?

Need flexible booking options for your flight to Seattle from Southampton? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Southampton to Seattle become cheaper?

Yes, Cheapflights offers price alerts on Southampton to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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