Find flights
When to book
FAQs

Cheap flights from Southampton to Seattle from £519

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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
17 Jun — 24 Jun1
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 18 May 2026.

Wed 17/608:15
SOU
-
SEA
1 stop16h 55m
Aer Lingus
Wed 24/619:10
SEA
-
SOU
1 stop16h 20m
Aer Lingus
Deal found 17/5£736
Wed 17/618:25
SOU
-
SEA
2 stops30h 45m
Multiple Airlines
Wed 24/619:10
SEA
-
SOU
1 stop16h 20m
Multiple Airlines
Deal found 17/5£790
Wed 24/609:05
SOU
-
SEA
1 stop15h 19m
Delta
Thu 16/705:20
SEA
-
SOU
2 stops28h 15m
Delta
Deal found 16/5£861
Sun 21/617:20
SOU
-
SEA
1 stop31h 04m
Delta
Thu 23/713:45
SEA
-
SOU
1 stop19h 50m
Delta
Deal found 16/5£861
Thu 2/709:05
SOU
-
SEA
2 stops22h 03m
Delta
Thu 9/717:40
SEA
-
SOU
1 stop15h 55m
Delta
Deal found 18/5£864

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 18 May 2026.

Round-trip from

£736

One-way from

£519

Popular in

July

Cheapest in

February

Average price

£559
Aer Lingus
  • Aer Lingus
  • 17/6-24/6
  • 2 total stops
  • 33h 15m total
  • Southampton to Seattle
Search Deals
British Airways
  • British Airways
  • 2/11
  • 1 total stop
  • 17h 00m total
  • Southampton to Seattle
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£50 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 18 May 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 22/6

17:20-16:24

1 stop31h 04m

Seattle/Tacoma Intl

Thu 23/7

13:45-17:35

1 stop19h 50m

£861

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 22/6

17:20-16:24

1 stop31h 04m

Seattle/Tacoma Intl

Sun 26/7

23:15-08:45

2 stops25h 30m

£861

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 21/6

09:15-11:37

1 stop34h 22m

Seattle/Tacoma Intl

Wed 22/7

17:40-17:35

1 stop15h 55m

£861

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 22/6

17:20-16:24

1 stop31h 04m

Seattle/Tacoma Intl

Tue 21/7

23:59-08:45

2 stops24h 46m

£861

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 23/6

09:05-16:24

1 stop15h 19m

Seattle/Tacoma Intl

Sun 26/7

23:15-08:45

2 stops25h 30m

£861
Fastest return journey

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 24/6

09:05-16:24

1 stop15h 19m

Seattle/Tacoma Intl

Wed 22/7

14:30-17:35

2 stops19h 05m

£861

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 2/7

09:05-23:08

2 stops22h 03m

Seattle/Tacoma Intl

Thu 9/7

17:40-17:35

1 stop15h 55m

£864

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 1/9

20:00-17:10

1 stop29h 10m

Seattle/Tacoma Intl

Sat 5/9

19:10-08:40

1 stop29h 30m

£890

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 26/6

09:05-11:37

1 stop34h 32m

Seattle/Tacoma Intl

Thu 16/7

07:20-08:45

2 stops17h 25m

£891

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 27/6

17:20-17:00

2 stops31h 40m

Seattle/Tacoma Intl

Thu 16/7

05:20-17:35

2 stops28h 15m

£895

Flights are sorted by cheapest return flights first.

Deals found on 18/5

Showing 1-10 of 19 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.

Cheapflights Insights

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

What’s the top stopover airport for flights from Southampton to Seattle?

Share of one-stop return flights from Southampton to Seattle chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Dublin (DUB) – chosen by Cheapflights users on 50% of one-stop itineraries from Southampton to Seattle on Cheapflights.

What’s the cheapest stopover airport for flights from Southampton to Seattle?

Average return fare for one-stop flights from Southampton to Seattle, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Dublin (DUB) is the most affordable one-stop option, with an average return flight price of £742.

What’s the fastest stopover option from Southampton to Seattle?

Shortest average travel time for one-stop one-way flights from Southampton to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 16h 40m.

Which airport typically offers the quickest stopover for flights from Southampton to Seattle?

Average stopover duration for one-stop one-way flights from Southampton to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 9h 28m.

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 31h 04m. 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

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.