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Cheap flights from Southampton to Seattle from £472

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 21/4. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
19 Dec — 26 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 19 November 2025.

Thu 4/1218:05SOU - SEA
1 stop25h 45mDelta
Sun 7/1221:59SEA - SOU
2 stops26h 11mDelta
Deal found 17/11£522
Mon 15/1208:40SOU - SEA
1 stop35h 10mMultiple Airlines
Mon 22/1215:05SEA - SOU
1 stop33h 05mMultiple Airlines
Deal found 17/11£743
Mon 15/1208:40SOU - SEA
2 stops46h 45mVirgin Atlantic
Mon 22/1206:00SEA - SOU
2 stops18h 10mVirgin Atlantic
Deal found 17/11£842
Mon 15/1209:30SOU - SEA
1 stop16h 50mBritish Airways
Sun 4/118:50SEA - SOU
2 stops17h 30mBritish Airways
Deal found 17/11£1,036
Mon 15/1209:30SOU - SEA
1 stop16h 50mBritish Airways
Thu 1/118:50SEA - SOU
2 stops29h 50mBritish Airways
Deal found 17/11£1,119

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 19 November 2025.

Round-trip from

£522

One-way from

£472

Popular in

July

Cheapest in

February

Average price

£544
Delta
  • Delta
  • 4/12-7/12
  • 2 total stops
  • 68h 05m total
  • Southampton to Seattle
Search Deals
British Airways
  • British Airways
  • 21/4
  • 1 total stop
  • 15h 49m total
  • Southampton to Seattle
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£58 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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 19 November 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

Thu 4/12

08:50-11:50

1 stop35h 00m

Seattle/Tacoma Intl

Sun 7/12

15:05-08:10

1 stop33h 05m

£522

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 15/12

08:40-11:50

1 stop35h 10m

Seattle/Tacoma Intl

Mon 22/12

15:05-08:10

1 stop33h 05m

£743

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 15/12

08:40-23:25

2 stops46h 45m

Seattle/Tacoma Intl

Mon 22/12

06:00-08:10

2 stops18h 10m

£842

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 21/4

09:10-16:59

1 stop15h 49m

£472

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 23/3

09:30-12:30

2 stops34h 00m

£474

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 23/3

09:30-19:20

1 stop16h 50m

£509

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 15/12

09:30-18:20

1 stop16h 50m

£780

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 29/12

09:30-18:20

1 stop16h 50m

£781

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 28/12

16:05-18:20

1 stop34h 15m

£786

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 16/12

20:10-18:20

1 stop30h 10m

£787

Flights are sorted by cheapest return flights first.

Deals found on 17/11

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 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, March is the cheapest month in which you can book a flight from Southampton to Seattle (average of £310). 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?

    Delta can get you from Southampton to Seattle in just under 35h. 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.

  • What is the cheapest month to book a flight from Southampton to Seattle?

    Currently, March is the cheapest month in which you can book a flight from Southampton to Seattle (average of £310). 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
Leavenworth
Bothell
SeaTac

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Alternative routes for Southampton to Seattle

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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.

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