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

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

What airlines fly to Southampton?

British Airways, Delta and Virgin Atlantic are the top three most popular airlines that fly to Southampton from Seattle according to our data. British Airways is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Southampton. Keep in mind that there are 14 different airlines that fly to Southampton on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport are updated daily.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport.

What documentation or ID do you need to fly to Southampton Eastleigh Airport?

The travel and health documents you'll need for your trip to Southampton Eastleigh Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Southampton Eastleigh Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$310 Cheap Flights from Seattle to Southampton in 2025/26

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0 bags

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Find the cheapest flights from Seattle to London

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:50 pm - 9:45 am

SEA

SOU

30h 55m2 stops

8:40 am - 4:55 pm

SOU

SEA

40h 15m2 stops

$5,876British Airways

Thu, Feb 5 - Mon, Feb 9

Delta flights from Seattle to Southampton

Our best Delta deals on Seattle to Southampton flight tickets

Delta

Feb 3

SEA3:05 pmSeattle/Tacoma Intl

18h 00m

1 stop

SOU5:05 pmSouthampton Eastleigh

Feb 19

SOU5:35 pmSouthampton Eastleigh

26h 05m

1 stop

SEA11:40 amSeattle/Tacoma Intl

$750

Find similar

Delta

Feb 3

SEA6:05 amSeattle/Tacoma Intl

18h 45m

2 stops

SOU8:50 amSouthampton Eastleigh

Feb 19

SOU5:35 pmSouthampton Eastleigh

26h 05m

1 stop

SEA11:40 amSeattle/Tacoma Intl

$754

Find similar

Delta

Feb 3

SEA6:15 amSeattle/Tacoma Intl

18h 35m

2 stops

SOU8:50 amSouthampton Eastleigh

Feb 19

SOU9:00 amSouthampton Eastleigh

21h 22m

2 stops

SEA10:22 pmSeattle/Tacoma Intl

$764

Find similar

Virgin Atlantic flights from Seattle to Southampton

Our best Virgin Atlantic deals on Seattle to Southampton flight tickets

Virgin Atlantic

Apr 29

SEA7:15 amSeattle/Tacoma Intl

25h 35m

2 stops

SOU4:50 pmSouthampton Eastleigh

May 13

SOU5:20 pmSouthampton Eastleigh

26h 22m

1 stop

SEA11:42 amSeattle/Tacoma Intl

$768

Find similar

Virgin Atlantic

Apr 29

SEA7:15 amSeattle/Tacoma Intl

25h 35m

2 stops

SOU4:50 pmSouthampton Eastleigh

May 13

SOU9:05 amSouthampton Eastleigh

21h 00m

2 stops

SEA10:05 pmSeattle/Tacoma Intl

$778

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Thu 2/5

6:50 pm-9:45 am

2 stops30h 55m

Southampton Eastleigh

Mon 2/9

8:40 am-4:55 pm

2 stops40h 15m

$5,876

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 2/10

8:10 am-11:55 am

2 stops19h 45m

$4,788

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Seattle to Southampton

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 Southampton?

On average, the least expensive day to fly to Southampton from Seattle is on a Saturday. momondo users have found tickets for Saturday departures for as low as $944. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Southampton for around $1,316.

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

Flying to Southampton from Seattle at noon is the least expensive time of day to depart. momondo users have found prices as low as $1,075 when looking at flights departing at noon. Flights to Southampton are more costly in the evening, with an average ticket price of $1,182. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Seattle to Southampton flights?

You could potentially save up to 26% on your flight if you consider stops on a Seattle to Southampton flight.

When to book flights from Seattle to Southampton

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

Estimated round-trip price

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

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

Fastest flight time	30h 55m
Direct flights	None

The fastest flight from Seattle to Southampton takes 30h 55m

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

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How far is Seattle/Tacoma Intl to Southampton Eastleigh by plane?
A flight from Seattle/Tacoma Intl to Southampton Eastleigh will travel around 4779.5 mi. 30h 55m is a normal flight duration for this route.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport are updated daily.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Southampton Eastleigh Airport.
What documentation or ID do you need to fly to Southampton Eastleigh Airport?
The travel and health documents you'll need for your trip to Southampton Eastleigh Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Southampton Eastleigh Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Portsmouth

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Southampton from Seattle.

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

All flight searches from Seattle to Southampton on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Seattle to Southampton flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to Southampton from Seattle. 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.