Find flights
When to book
FAQs

Cheap flights from Southampton to Seattle from £476

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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
12 Sep — 19 Sep1
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 13 August 2026.

Wed 9/909:20 -
1 stop15h 50m
Tue 15/919:10 -
1 stop16h 20m
Deal found 10/8£631
Wed 9/909:15 -
1 stop34h 32m
Tue 15/907:15 -
2 stops17h 30m
Deal found 10/8£657
Wed 30/909:20 -
1 stop15h 50m
Sun 4/1019:10 -
1 stop16h 20m
Deal found 12/8£798
Thu 24/919:55 -
2 stops23h 40m
Fri 2/1019:10 -
1 stop13h 40m
Deal found 9/8£845

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 13 August 2026.

Round-trip from

£631

One-way from

£476

Popular in

December

Cheapest in

February

Average price

£619
Aer Lingus
  • Aer Lingus
  • 9/9-15/9
  • 2 total stops
  • 32h 10m total
  • Southampton to Seattle
Search Deals
British Airways
  • British Airways
  • 6/10
  • 1 total stop
  • 15h 55m total
  • Southampton to Seattle
Search Deals
High demand for flights, 1% 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 August 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 13 August 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 Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Wed 9/9

09:15-20:21

2 stops19h 06m

Seattle/Tacoma Intl

Tue 15/9

07:15-08:45

2 stops17h 30m

£665
Fastest return journey

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Wed 30/9

09:20-17:10

1 stop15h 50m

Seattle/Tacoma Intl

Sun 4/10

19:10-19:30

1 stop16h 20m

£798
Cheapest one-way

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Tue 6/10

09:15-17:10

1 stop15h 55m

£476

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Sat 5/12

10:15-16:50

2 stops38h 35m

£506

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Wed 4/11

15:15-11:25

2 stops28h 10m

£506

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Fri 6/11

06:50-16:50

2 stops18h 00m

£517

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Sat 7/11

07:50-16:50

2 stops41h 00m

£517

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Mon 2/11

06:50-11:25

2 stops36h 35m

£517

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Sun 1/11

17:55-11:25

2 stops49h 30m

£517
Fastest single journey

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Fri 2/10

09:20-17:10

1 stop15h 50m

£586

Flights are sorted by cheapest return flights first.

Deals found on 8/8

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?

    KLM and British Airways can get you from Southampton to Seattle in just under 15h 50m. Your travel time can differ by up to 3h 16m. The distance from Southampton to Seattle is about 4787 mi. Both multi-stop and direct flights can be found to your destination and back.

  • 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
Federal Way
SeaTac

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.