What is the cheapest airline that flies from Southampton Eastleigh to Seattle/Tacoma Intl?

Aer Lingus and British Airways are the most popular carriers operating from Southampton Eastleigh to Seattle/Tacoma Intl

What airlines fly to Seattle?

British Airways, Delta and Virgin Atlantic are the top three most popular airlines that fly to Seattle from Southampton according to our data. British Airways is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 5 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Southampton Eastleigh Airport to Seattle/Tacoma Intl Airport?

Prices for flights from Southampton Eastleigh Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

How old do you have to be to fly from Southampton Eastleigh Airport to Seattle/Tacoma Intl Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Southampton Eastleigh Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$377 Cheap Flights from Southampton to Seattle in 2026

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Find the cheapest flights from Southampton to Seattle

Round-trip

One-way

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Enter your travel dates to find the best prices.

12:25 pm - 6:20 pm

SOU

SEA

13h 55m

1 stop

9:05 pm - 7:40 pm

SEA

SOU

15h 35m

1 stop

$718British Airways

Wed, Mar 4 - Sun, Mar 8

12:25 pm - 6:20 pm

SOU

SEA

13h 55m

1 stop

7:50 pm - 8:25 am

SEA

SOU

29h 35m

2 stops

$747British Airways

Wed, Mar 4 - Sun, Mar 8

8:55 am - 4:55 pm

SOU

SEA

16h 00m

2 stops

7:50 pm - 8:25 am

SEA

SOU

29h 35m

2 stops

$802British Airways

Wed, Mar 4 - Sun, Mar 8

5:35 pm - 3:07 pm

SOU

SEA

28h 32m

2 stops

10:25 pm - 5:15 pm

SEA

SOU

35h 50m

2 stops

$871Multiple Airlines

Fri, Mar 13 - Fri, Mar 20

5:35 pm - 12:35 pm

SOU

SEA

26h 00m

1 stop

10:25 pm - 5:15 pm

SEA

SOU

35h 50m

2 stops

$900Multiple Airlines

Fri, Mar 13 - Fri, Mar 20

12:25 pm - 6:20 pm

SOU

SEA

13h 55m

1 stop

9:05 pm - 7:40 pm

SEA

SOU

15h 35m

1 stop

$1,042British Airways

Wed, Mar 4 - Sun, Mar 8

12:25 pm - 6:20 pm

SOU

SEA

13h 55m

1 stop

9:05 pm - 7:40 pm

SEA

SOU

15h 35m

1 stop

$1,047British Airways

Wed, Mar 4 - Sun, Mar 8

12:25 pm - 6:20 pm

SOU

SEA

13h 55m

1 stop

7:50 pm - 8:10 am

SEA

SOU

29h 20m

2 stops

$1,055British Airways

Wed, Mar 4 - Sun, Mar 8

12:25 pm - 6:20 pm

SOU

SEA

13h 55m

1 stop

7:50 pm - 8:10 am

SEA

SOU

29h 20m

2 stops

$1,059British Airways

Wed, Mar 4 - Sun, Mar 8

5:35 pm - 12:35 pm

SOU

SEA

26h 00m

1 stop

4:05 pm - 5:00 pm

SEA

SOU

17h 55m

1 stop

$1,062Multiple Airlines

Fri, Mar 13 - Fri, Mar 20

British Airways flights from Southampton to Seattle

Our best British Airways deals on Southampton to Seattle flight tickets

British Airways

Mar 4

SOU12:25 pmSouthampton Eastleigh

13h 55m

1 stop

SEA6:20 pmSeattle/Tacoma Intl

Mar 8

SEA9:05 pmSeattle/Tacoma Intl

15h 35m

1 stop

SOU7:40 pmSouthampton Eastleigh

$718

British Airways

Mar 4

SOU12:25 pmSouthampton Eastleigh

13h 55m

1 stop

SEA6:20 pmSeattle/Tacoma Intl

Mar 8

SEA7:50 pmSeattle/Tacoma Intl

29h 35m

2 stops

SOU8:25 amSouthampton Eastleigh

$747

British Airways

Mar 4

SOU8:55 amSouthampton Eastleigh

16h 00m

2 stops

SEA4:55 pmSeattle/Tacoma Intl

Mar 8

SEA7:50 pmSeattle/Tacoma Intl

29h 35m

2 stops

SOU8:25 amSouthampton Eastleigh

$802

Aer Lingus flights from Southampton to Seattle

Our best Aer Lingus deals on Southampton to Seattle flight tickets

Aer Lingus

Mar 11

SOU12:25 pmSouthampton Eastleigh

13h 55m

1 stop

SEA7:20 pmSeattle/Tacoma Intl

Mar 17

SEA12:07 amSeattle/Tacoma Intl

25h 38m

2 stops

SOU8:45 amSouthampton Eastleigh

$4,569

Aer Lingus

Mar 11

SOU12:25 pmSouthampton Eastleigh

18h 59m

2 stops

SEA12:24 amSeattle/Tacoma Intl

Mar 17

SEA12:07 amSeattle/Tacoma Intl

25h 38m

2 stops

SOU8:45 amSouthampton Eastleigh

$4,574

Aer Lingus

Mar 11

SOU12:25 pmSouthampton Eastleigh

13h 55m

1 stop

SEA7:20 pmSeattle/Tacoma Intl

Mar 18

SEA9:05 pmSeattle/Tacoma Intl

15h 35m

1 stop

SOU7:40 pmSouthampton Eastleigh

$5,090

Fly from

Fly to

Route

Depart

Return

Price

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 3/4

12:25 pm-6:20 pm

1 stop13h 55m

Seattle/Tacoma Intl

Sun 3/8

9:05 pm-7:40 pm

1 stop15h 35m

$718

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 3/4

12:25 pm-6:20 pm

1 stop13h 55m

Seattle/Tacoma Intl

Sun 3/8

7:50 pm-8:25 am

2 stops29h 35m

$747

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 3/4

8:55 am-4:55 pm

2 stops16h 00m

Seattle/Tacoma Intl

Sun 3/8

7:50 pm-8:25 am

2 stops29h 35m

$802

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 3/13

5:35 pm-3:07 pm

2 stops28h 32m

Seattle/Tacoma Intl

Fri 3/20

10:25 pm-5:15 pm

2 stops35h 50m

$871

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 3/13

5:35 pm-12:35 pm

1 stop26h 00m

Seattle/Tacoma Intl

Fri 3/20

10:25 pm-5:15 pm

2 stops35h 50m

$900

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 3/4

12:25 pm-6:20 pm

1 stop13h 55m

Seattle/Tacoma Intl

Sun 3/8

9:05 pm-7:40 pm

1 stop15h 35m

$1,042

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 3/4

12:25 pm-6:20 pm

1 stop13h 55m

Seattle/Tacoma Intl

Sun 3/8

9:05 pm-7:40 pm

1 stop15h 35m

$1,047

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 3/4

12:25 pm-6:20 pm

1 stop13h 55m

Seattle/Tacoma Intl

Sun 3/8

7:50 pm-8:10 am

2 stops29h 20m

$1,055

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 3/4

12:25 pm-6:20 pm

1 stop13h 55m

Seattle/Tacoma Intl

Sun 3/8

7:50 pm-8:10 am

2 stops29h 20m

$1,059

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 3/13

5:35 pm-12:35 pm

1 stop26h 00m

Seattle/Tacoma Intl

Fri 3/20

4:05 pm-5:00 pm

1 stop17h 55m

$1,062

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Southampton to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Southampton is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $761. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Southampton because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,012.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Southampton in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $816 when looking at flights departing in the afternoon. Flights to Seattle are more costly at noon, with an average ticket price of $856. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from Southampton to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Southampton to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Southampton to Seattle (SOU to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Southampton to Seattle

Fastest flight time	28h 32m
Direct flights	None

The fastest flight from Southampton to Seattle takes 28h 32m

There are no direct flights from Southampton to Seattle. There are no popular flight routes from Southampton to Seattle.

Search flight deals

How far is Southampton Eastleigh to Seattle/Tacoma Intl by plane?
The straight-line distance from Southampton Eastleigh to Seattle/Tacoma Intl is 4779.5 mi. Flights usually cover this in 28h 32m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Southampton Eastleigh Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Southampton Eastleigh Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How old do you have to be to fly from Southampton Eastleigh Airport to Seattle/Tacoma Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Southampton Eastleigh Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Redmond

Cle Elum

Tukwila

Lakewood

Federal Way

Centralia

Westport

Kirkland

Fife

Tumwater

Why use momondo?

Why should I use momondo to find a flight deal from Southampton to Seattle?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Southampton to Seattle for you.

Can I find flights from Southampton to Seattle with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Southampton to Seattle flights to just show those with flexible booking policies.

How can momondo help me find flights from Southampton to Seattle?

Once you have performed a search for Southampton to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Southampton to Seattle right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Seattle from Southampton. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.