SEA - SOU

$372 Find Cheap Flights from Seattle to Southampton

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Southampton departing on 11/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Southampton

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Southampton, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Southampton, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Seattle to Southampton (SEA-SOU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Southampton that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Southampton

Mon, Nov 17 - Wed, Dec 3
Delta Logo
3:00 pm - 8:10 amSEA-SOU
33h 10m1 stop
Delta Logo
5:30 pm - 11:50 amSOU-SEA
26h 20m1 stop
$833Delta
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Mon, Nov 17 - Tue, Dec 2
Delta Logo
11:46 am - 5:00 pmSEA-SOU
21h 14m2 stops
Delta Logo
5:30 pm - 11:50 amSOU-SEA
26h 20m1 stop
$837Delta
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Sat, Nov 22 - Wed, Dec 3
Delta Logo
11:10 pm - 8:10 amSEA-SOU
25h 00m2 stops
Delta Logo
8:40 am - 8:26 pmSOU-SEA
19h 46m2 stops
$847Delta
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Mon, Nov 17 - Thu, Nov 27
Delta Logo
3:00 pm - 5:00 pmSEA-SOU
18h 00m1 stop
Delta Logo
8:50 am - 10:54 amSOU-SEA
34h 04m2 stops
$849Delta
Find Deal
Tue, Nov 18 - Thu, Nov 27
Delta Logo
3:00 pm - 5:00 pmSEA-SOU
18h 00m1 stop
Delta Logo
8:50 am - 12:57 pmSOU-SEA
36h 07m2 stops
$850Delta
Find Deal
Tue, Nov 18 - Thu, Nov 27
Delta Logo
9:28 am - 5:00 pmSEA-SOU
23h 32m2 stops
Delta Logo
8:50 am - 10:54 amSOU-SEA
34h 04m2 stops
$854Delta
Find Deal
Thu, Oct 30 - Thu, Nov 6
Delta Logo
4:00 pm - 5:00 pmSEA-SOU
18h 00m1 stop
Delta Logo
6:05 pm - 11:45 amSOU-SEA
25h 40m1 stop
$883Delta
Find Deal
Wed, Oct 29 - Thu, Nov 6
Aer Lingus Logo
12:34 am - 8:45 amSEA-SOU
25h 11m2 stops
Aer Lingus Logo
8:10 pm - 6:20 pmSOU-SEA
30h 10m1 stop
$929Aer Lingus
Find Deal
Wed, Oct 29 - Thu, Nov 6
Aer Lingus Logo
12:34 am - 8:45 amSEA-SOU
25h 11m2 stops
Aer Lingus Logo
9:30 am - 11:18 pmSOU-SEA
21h 48m2 stops
$938Aer Lingus
Find Deal
Thu, Oct 30 - Thu, Nov 6
Multiple Airlines Logo
3:35 pm - 7:30 pmSEA-SOU
20h 55m2 stops
Multiple Airlines Logo
8:10 pm - 5:00 pmSOU-SEA
28h 50m3 stops
$1,051Multiple Airlines
Find Deal

Everything you should know

Top airlines
Delta
Cheapest • from $833 (round-trip)
KLM
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$833
Delta
Mon 11/17Wed 12/3
SEA - SOU • 1 stop
Cheapest one-way
$372
Multiple Airlines
Sat 11/1
SEA - SOU • 3 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Southampton!
Booking Insights

KAYAK's insights & trends for Seattle to Southampton flights

Get data-powered insights and trends into flights from Seattle to Southampton to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Seattle to Southampton?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Seattle to Southampton were found on Delta ($833) and Aer Lingus ($929).

Find deals

Good to know

Cheapest flight$372
Flight from Seattle to Southampton

When to book flights from Seattle to Southampton

Are your dates flexible? Find out the best times to travel from Seattle to Southampton based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Southampton

  • What is the cheapest flight from Seattle to Southampton?

    In the last 3 days, the lowest price for a flight from Seattle to Southampton was $372 for a one-way ticket and $833 for a round-trip.

  • Do I need a passport to fly between Seattle and Southampton?

    Yes

  • Which airports will I be using when flying from Seattle to Southampton?

    On your way to Southampton, you’ll fly out from Seattle/Tacoma Intl. You’ll be landing at Southampton Eastleigh.

  • Which aircraft models fly most regularly from Seattle to Southampton?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Southampton?

    SkyTeam is the only airline alliance operating flights between Seattle and Southampton.

  • How does KAYAK find such low prices on flights from Seattle to Southampton?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Southampton.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Southampton?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Southampton from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Southampton?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Southampton with an airline and back to Seattle with another airline. Booking your flights between Seattle and SOU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Southampton?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Southampton from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Seattle to Southampton

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Southampton. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Southampton? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
KLMOverall score based on 1386 reviews
7.7Comfort
8.4Crew
7.3Food
7.2Entertainment
7.8Boarding
Airline reviews

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

10.0 ExcellentCameron, Sep 2025YYJ - YYC
Read more KLM reviews

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

Ad experience - been flying many years with them but they are losing out to other carriers with their service and bagage / seating policy. My 2 12-yo kids were not placed with the parent. Absurdity.

KLM remains a quality flag carrier airline which maintains its standards whilst all their competitors are lowering theirs.

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Klm start boarding while somw air issue in the plan

The service was great. However the lounge only gets passing grade

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Everything you need to know for your flight from Seattle to Southampton

Information on your arrival and departure airports

Seattle (SEA)
Southampton (SOU)

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