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Cheap flights from Southampton to Seattle from £375

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 30/5. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
17 Jan — 24 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Southampton to Seattle

Enter your travel dates to find the best prices.

Best flights from Southampton to Seattle
Discover carefully curated flight deals from Southampton to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 December 2025.

Wed 4/312:25SOU - SEA
1 stop13h 55mBritish Airways
Sun 8/321:05SEA - SOU
1 stop15h 35mBritish Airways
Deal found 17/12£526
Sat 31/109:25SOU - SEA
2 stops21h 00mVirgin Atlantic
Sat 7/221:59SEA - SOU
2 stops35h 06mVirgin Atlantic
Deal found 17/12£557
Sat 31/109:25SOU - SEA
2 stops21h 00mKLM
Sat 7/215:05SEA - SOU
1 stop18h 10mKLM
Deal found 17/12£582
Sat 31/109:25SOU - SEA
2 stops20h 24mDelta
Sat 7/215:05SEA - SOU
1 stop18h 10mDelta
Deal found 17/12£582
Fri 30/117:35SOU - SEA
1 stop26h 15mDelta
Fri 6/207:10SEA - SOU
2 stops17h 35mDelta
Deal found 15/12£584
Wed 14/109:25SOU - SEA
2 stops20h 24mKLM
Wed 21/107:10SEA - SOU
2 stops17h 15mKLM
Deal found 17/12£596
Wed 14/117:35SOU - SEA
1 stop26h 15mDelta
Wed 21/109:05SEA - SOU
2 stops24h 00mDelta
Deal found 17/12£592

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 December 2025.

Round-trip from

£527

One-way from

£375

Popular in

July

Cheapest in

January

Average price

£638
British Airways
  • British Airways
  • 4/3-8/3
  • 2 total stops
  • 29h 30m total
  • Southampton to Seattle
Search Deals
30/5
  • 30/5
  • 3 total stops
  • 44h 38m total
  • Southampton to Seattle
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£61 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 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 18 December 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

Wed 4/3

12:25-18:20

1 stop13h 55m

Seattle/Tacoma Intl

Sun 8/3

21:05-19:40

1 stop15h 35m

£526

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 31/1

09:25-22:25

2 stops21h 00m

Seattle/Tacoma Intl

Sat 7/2

21:59-17:05

2 stops35h 06m

£557

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 31/1

09:25-22:25

2 stops21h 00m

Seattle/Tacoma Intl

Sat 7/2

15:05-17:15

1 stop18h 10m

£582

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 31/1

09:25-21:49

2 stops20h 24m

Seattle/Tacoma Intl

Sat 7/2

15:05-17:15

1 stop18h 10m

£582

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 30/1

17:35-11:50

1 stop26h 15m

Seattle/Tacoma Intl

Fri 6/2

07:10-08:45

2 stops17h 35m

£584

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 14/1

17:35-11:50

1 stop26h 15m

Seattle/Tacoma Intl

Wed 21/1

09:05-17:05

2 stops24h 00m

£592

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 14/1

09:25-21:49

2 stops20h 24m

Seattle/Tacoma Intl

Wed 21/1

07:10-08:25

2 stops17h 15m

£596

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 30/5

07:50-20:28

3 stops44h 38m

£375

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 23/3

09:30-19:20

1 stop16h 50m

£387

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 1/6

19:20-22:00

2 stops34h 40m

£391

Flights are sorted by cheapest return flights first.

Deals found on 15/12

Showing 1-10 of 13 results
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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, March is the cheapest month in which you can book a flight from Southampton to Seattle (average of £305). Flying from Southampton to Seattle in August is currently the most expensive (average of £461). 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?

    British Airways and Virgin Atlantic can get you from Southampton to Seattle in just under 13h 55m. Your travel time can differ by up to 7h 05m. 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, March is the cheapest month in which you can book a flight from Southampton to Seattle (average of £305). Flying from Southampton to Seattle in August is currently the most expensive (average of £461). 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
SeaTac

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Alternative routes for Southampton to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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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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