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Cheap flights from Southampton to Seattle from £557

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 24/6. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
17 Apr — 24 Apr1
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 March 2026.

Mon 27/409:05
SOU
-
SEA
1 stop15h 25m
KLM
Mon 4/522:40
SEA
-
SOU
2 stops25h 55m
KLM
Deal found 13/3£697
Mon 27/409:05
SOU
-
SEA
2 stops22h 46m
Virgin Atlantic
Mon 4/522:35
SEA
-
SOU
2 stops26h 00m
Virgin Atlantic
Deal found 13/3£711
Mon 27/420:00
SOU
-
SEA
1 stop29h 10m
Aer Lingus
Mon 4/519:10
SEA
-
SOU
1 stop16h 20m
Aer Lingus
Deal found 13/3£713
Fri 10/417:20
SOU
-
SEA
1 stop26h 25m
KLM
Fri 17/417:35
SEA
-
SOU
1 stop31h 10m
KLM
Deal found 13/3£766
Tue 31/320:00
SOU
-
SEA
1 stop29h 10m
Aer Lingus
Tue 14/419:10
SEA
-
SOU
1 stop16h 20m
Aer Lingus
Deal found 16/3£807
Tue 31/309:05
SOU
-
SEA
1 stop34h 40m
KLM
Tue 14/413:30
SEA
-
SOU
2 stops19h 20m
KLM
Deal found 16/3£809
Fri 25/920:00
SOU
-
SEA
1 stop29h 10m
British Airways
Mon 28/919:10
SEA
-
SOU
1 stop16h 20m
British Airways
Deal found 15/3£819

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 March 2026.

Round-trip from

£697

One-way from

£557

Popular in

July

Cheapest in

February

Average price

£542
KLM
  • KLM
  • 27/4-4/5
  • 3 total stops
  • 41h 20m total
  • Southampton to Seattle
Search Deals
British Airways
  • British Airways
  • 24/6
  • 2 total stops
  • 18h 20m total
  • Southampton to Seattle
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£57 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 March 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 27/4

09:05-23:51

2 stops22h 46m

Seattle/Tacoma Intl

Mon 4/5

22:35-08:35

2 stops26h 00m

£711
Fastest return journey

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 27/4

20:00-17:10

1 stop29h 10m

Seattle/Tacoma Intl

Mon 4/5

19:10-19:30

1 stop16h 20m

£713

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 10/4

17:20-14:50

2 stops29h 30m

Seattle/Tacoma Intl

Fri 17/4

17:48-08:45

2 stops30h 57m

£789

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 31/3

09:05-11:45

1 stop34h 40m

Seattle/Tacoma Intl

Tue 14/4

13:30-16:50

2 stops19h 20m

£809

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 31/3

09:20-21:53

2 stops20h 33m

Seattle/Tacoma Intl

Mon 13/4

22:15-08:05

2 stops25h 50m

£877

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 27/4

17:20-18:45

3 stops33h 25m

Seattle/Tacoma Intl

Mon 4/5

19:00-08:25

3 stops29h 25m

£912

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 31/3

20:00-17:10

1 stop29h 10m

Seattle/Tacoma Intl

Mon 13/4

19:10-19:30

1 stop16h 20m

£920

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 10/4

18:20-12:20

2 stops26h 00m

Seattle/Tacoma Intl

Fri 17/4

19:00-08:45

3 stops29h 45m

£1,086
Cheapest one-way
Fastest single journey

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 24/6

06:50-17:10

2 stops18h 20m

£557

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 23/3

20:10-00:24

2 stops35h 14m

£565

Flights are sorted by cheapest return flights first.

Deals found on 16/3

Showing 1-10 of 13 resultsSorted by cheapest first
1
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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 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 £351). Flying from Southampton to Seattle in August is currently the most expensive (average of £469). 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?

    Virgin Atlantic, Aer Lingus, and KLM can get you from Southampton to Seattle in just under 22h 46m. Your travel time can differ by up to 6h 44m. 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.

  • 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 £351). Flying from Southampton to Seattle in August is currently the most expensive (average of £469). 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

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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