How long is the flight from Southampton to Seattle?

British Airways can get you from Southampton to Seattle in just under 15h 50m. Your travel time can differ by up to . The distance from Southampton to Seattle is about 4787 mi.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

What is the cheapest time of day to fly from SOU to SEA?

When flying from Southampton to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

£382+ Cheap Flights from Southampton to Seattle

Cheap flight deals from Southampton to Seattle

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 15 September 2026.

Mon 5/1020:00 -

1 stop29h 10m

Wed 21/1019:10 -

1 stop13h 40m

Deal found 12/9£524

Wed 14/1009:20 -

1 stop15h 50m

Sun 18/1019:10 -

1 stop13h 40m

Deal found 14/9£543

Mon 5/1009:05 -

1 stop15h 30m

Wed 21/1013:30 -

2 stops19h 20m

Deal found 12/9£559

Fri 30/1017:35 -

1 stop26h 12m

Fri 6/1114:35 -

1 stop18h 15m

Deal found 15/9£577

Fri 30/1020:00 -

2 stops28h 50m

Fri 6/1118:45 -

2 stops30h 00m

Deal found 15/9£585

Thu 29/1017:35 -

1 stop26h 12m

Thu 5/1114:35 -

1 stop34h 20m

Deal found 14/9£601

Find flight deals from Southampton to Seattle

Round-trip from	£524
One-way from	£382
Popular in	August
Cheapest in	February
Average price	£547

British Airways
5/10-21/10
2 total stops
42h 50m total
Southampton to Seattle

Search Deals

7/10-31/12
3 total stops
49h 45m total
Southampton to Seattle

Search Deals

Highest demand for flights based on searches. 6% potential increase in price (£28 potential increase over avg. return price).

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 September 2026

Search Deals

Cheapflights Fare Finder

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

Sun 27/12

20:50-16:50

2 stops28h 00m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£509

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Mon 28/12

06:50-11:25

2 stops36h 35m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£519

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Sat 26/12

19:55-16:50

2 stops28h 55m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£519

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Wed 14/10

09:20-17:10

1 stop15h 50m

Seattle/Tacoma Intl

Sun 18/10

19:10-16:50

1 stop13h 40m

£543

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Mon 5/10

09:05-16:35

1 stop15h 30m

Seattle/Tacoma Intl

Wed 21/10

13:30-16:50

2 stops19h 20m

£559

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Fri 30/10

20:00-17:50

2 stops28h 50m

Seattle/Tacoma Intl

Fri 6/11

18:45-08:45

2 stops30h 00m

£585

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Thu 29/10

17:35-12:47

1 stop26h 12m

Seattle/Tacoma Intl

Thu 5/11

14:35-08:55

1 stop34h 20m

£601

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Wed 7/10

20:00-17:10

1 stop29h 10m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£606

Fastest return journey

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Sat 17/10

09:20-17:10

1 stop15h 50m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£883

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Fri 16/10

20:00-17:10

1 stop29h 10m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£892

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Sorted by cheapest first

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.

SOU-SEA

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

How long is the flight from Southampton to Seattle?
British Airways can get you from Southampton to Seattle in just under 15h 50m. 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

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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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Cheap flights from Southampton to Seattle from £382

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Southampton to Seattle

Cheapest flights from Southampton to SeattleExplore 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 15 September 2026.

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 15 September 2026.

Best flights from Southampton to SeattleDiscover 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 15 September 2026.

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 15 September 2026.

Last-minute flights from Southampton to SeattleDiscover last-minute flight deals from Southampton to Seattle. Data last updated 15 September 2026 and is based on user searches.

Discover last-minute flight deals from Southampton to Seattle. Data last updated 15 September 2026 and is based on user searches.

One-way flights from Southampton to SeattleSearch for one-way flight options from Southampton to Seattle. Find affordable one-way fares based on user searches. Data last updated 15 September 2026.

Search for one-way flight options from Southampton to Seattle. Find affordable one-way fares based on user searches. Data last updated 15 September 2026.

Find flight deals from Southampton to Seattle

Round-trip from

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Cheapflights Fare Finder

Use the filters below to find and compare flights from Southampton to Seattle that are best for you.

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.

Related info for your journey

How long is the flight from Southampton to Seattle?

Can I find deals for flights from Southampton to Seattle that include hotel bookings?

How can I find direct flights from Southampton to Seattle?

Can I find deals for business class flights from Southampton to Seattle?

Travelling to a place near Seattle?

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.

Alternative routes for Southampton to Seattle

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

Complete your trip

Complete your trip to Seattle by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to Washington

Book a non-stop flight to one of these other cities located in Washington.

Search flights from Southampton to Seattle by cabin class

Find flights from Southampton to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Southampton and Seattle flights

Browse other Southampton and Seattle flight options. Last updated on 15 September 2026.

Other flights from Southampton

Browse through other flights departing from Southampton. Flights are based on user searches made on Cheapflights and were last updated on 15 September 2026.

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Other flights to Seattle

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How does Cheapflights help users find flights from Southampton to Seattle?

Why should you use Cheapflights to find cheap flight tickets from Southampton to Seattle?

Can Cheapflights find flights from Southampton to Seattle with no change fees?

Can Cheapflights notify me if prices for flights from Southampton to Seattle become cheaper?

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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 15 September 2026.

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 15 September 2026.

Last-minute flights from Southampton to Seattle
Discover last-minute flight deals from Southampton to Seattle. Data last updated 15 September 2026 and is based on user searches.

One-way flights from Southampton to Seattle
Search for one-way flight options from Southampton to Seattle. Find affordable one-way fares based on user searches. Data last updated 15 September 2026.