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 35% 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.

$608 Cheap Flights from Southampton to Seattle in 2026

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Find the cheapest flights from Southampton to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:20 am - 5:10 pm

SOU

SEA

15h 50m

1 stop

7:10 pm - 7:30 pm

SEA

SOU

16h 20m

1 stop

$935Aer Lingus

Mon, Jun 22 - Mon, Jun 29

9:20 am - 5:10 pm

SOU

SEA

15h 50m

1 stop

7:10 pm - 7:30 pm

SEA

SOU

16h 20m

1 stop

$991Aer Lingus

Thu, Jun 18 - Thu, Jun 25

9:05 am - 4:24 pm

SOU

SEA

15h 19m

1 stop

5:30 am - 8:35 am

SEA

SOU

19h 05m

2 stops

$1,128Delta

Mon, Jun 22 - Mon, Jun 29

9:05 am - 11:08 pm

SOU

SEA

22h 03m

2 stops

7:15 am - 8:35 am

SEA

SOU

17h 20m

2 stops

$1,134Delta

Mon, Jun 22 - Mon, Jun 29

5:20 pm - 11:37 am

SOU

SEA

26h 17m

1 stop

1:45 pm - 5:35 pm

SEA

SOU

19h 50m

1 stop

$1,168Delta

Sun, Jun 21 - Thu, Jul 9

5:20 pm - 4:30 pm

SOU

SEA

31h 10m

2 stops

1:37 pm - 5:35 pm

SEA

SOU

19h 58m

2 stops

$1,173Delta

Tue, Jun 23 - Mon, Jul 6

9:20 am - 5:10 pm

SOU

SEA

15h 50m

1 stop

10:28 pm - 4:50 pm

SEA

SOU

34h 22m

2 stops

$1,174Multiple Airlines

Thu, Jun 18 - Thu, Jun 25

9:20 am - 5:10 pm

SOU

SEA

15h 50m

1 stop

7:10 pm - 4:50 pm

SEA

SOU

13h 40m

1 stop

$1,190British Airways

Tue, Jun 23 - Tue, Jul 7

9:20 am - 5:10 pm

SOU

SEA

15h 50m

1 stop

7:10 pm - 4:50 pm

SEA

SOU

13h 40m

1 stop

$1,192British Airways

Mon, Jun 22 - Mon, Jul 6

9:15 am - 11:37 am

SOU

SEA

34h 22m

1 stop

11:59 pm - 8:45 am

SEA

SOU

24h 46m

2 stops

$1,208Delta

Sun, Jun 21 - Fri, Jul 10

British Airways flights from Southampton to Seattle

Our best British Airways deals on Southampton to Seattle flight tickets

British Airways

Jun 23

SOU9:20 amSouthampton Eastleigh

15h 50m

1 stop

SEA5:10 pmSeattle/Tacoma Intl

Jul 7

SEA7:10 pmSeattle/Tacoma Intl

13h 40m

1 stop

SOU4:50 pmSouthampton Eastleigh

$1,190

British Airways

Jun 22

SOU9:20 amSouthampton Eastleigh

15h 50m

1 stop

SEA5:10 pmSeattle/Tacoma Intl

Jul 6

SEA7:10 pmSeattle/Tacoma Intl

13h 40m

1 stop

SOU4:50 pmSouthampton Eastleigh

$1,192

British Airways

Jun 22

SOU9:20 amSouthampton Eastleigh

15h 50m

1 stop

SEA5:10 pmSeattle/Tacoma Intl

Jul 8

SEA7:10 pmSeattle/Tacoma Intl

13h 40m

1 stop

SOU4:50 pmSouthampton Eastleigh

$1,212

Aer Lingus flights from Southampton to Seattle

Our best Aer Lingus deals on Southampton to Seattle flight tickets

Aer Lingus

Jun 22

SOU9:20 amSouthampton Eastleigh

15h 50m

1 stop

SEA5:10 pmSeattle/Tacoma Intl

Jun 29

SEA7:10 pmSeattle/Tacoma Intl

16h 20m

1 stop

SOU7:30 pmSouthampton Eastleigh

$935

Aer Lingus

Jun 18

SOU9:20 amSouthampton Eastleigh

15h 50m

1 stop

SEA5:10 pmSeattle/Tacoma Intl

Jun 25

SEA7:10 pmSeattle/Tacoma Intl

16h 20m

1 stop

SOU7:30 pmSouthampton Eastleigh

$991

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 6/22

9:20 am-5:10 pm

1 stop15h 50m

Seattle/Tacoma Intl

Mon 6/29

7:10 pm-7:30 pm

1 stop16h 20m

$935

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 6/18

9:20 am-5:10 pm

1 stop15h 50m

Seattle/Tacoma Intl

Thu 6/25

7:10 pm-7:30 pm

1 stop16h 20m

$991

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 6/22

9:05 am-4:24 pm

1 stop15h 19m

Seattle/Tacoma Intl

Mon 6/29

5:30 am-8:35 am

2 stops19h 05m

$1,128

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 6/22

9:05 am-11:08 pm

2 stops22h 03m

Seattle/Tacoma Intl

Mon 6/29

7:15 am-8:35 am

2 stops17h 20m

$1,134

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 6/21

5:20 pm-11:37 am

1 stop26h 17m

Seattle/Tacoma Intl

Thu 7/9

1:45 pm-5:35 pm

1 stop19h 50m

$1,168

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 6/23

5:20 pm-4:30 pm

2 stops31h 10m

Seattle/Tacoma Intl

Mon 7/6

1:37 pm-5:35 pm

2 stops19h 58m

$1,173

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 6/18

9:20 am-5:10 pm

1 stop15h 50m

Seattle/Tacoma Intl

Thu 6/25

10:28 pm-4:50 pm

2 stops34h 22m

$1,174

Quickest round-trip

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 6/23

9:20 am-5:10 pm

1 stop15h 50m

Seattle/Tacoma Intl

Tue 7/7

7:10 pm-4:50 pm

1 stop13h 40m

$1,190

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 6/22

9:20 am-5:10 pm

1 stop15h 50m

Seattle/Tacoma Intl

Mon 7/6

7:10 pm-4:50 pm

1 stop13h 40m

$1,192

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 6/21

9:15 am-11:37 am

1 stop34h 22m

Seattle/Tacoma Intl

Fri 7/10

11:59 pm-8:45 am

2 stops24h 46m

$1,208

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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 Monday. momondo users have found tickets for Monday departures for as low as $841. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday 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 $947.

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

Flying to Seattle from Southampton at noon is the least expensive time of day to depart. momondo users have found prices as low as $855 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $908. Departure times in the morning 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	15h 50m
Direct flights	None

The fastest flight from Southampton to Seattle takes 15h 50m

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

Search flight deals

Frequently asked questions about flying from Southampton to Seattle

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 15h 50m, 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

Redmond

Kent

Tukwila

Puyallup

Marysville

Lakewood

Cle Elum

Federal Way

Centralia

Fife

Westport

Shoreline

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.