SEA - SOU

$369 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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Flights 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

Sun, Sep 14 - Wed, Sep 24
Aer Lingus Logo
7:35 pm - 8:15 amSEA-SOU
28h 40m1 stop
Aer Lingus Logo
8:00 pm - 5:50 pmSOU-SEA
29h 50m1 stop
$825Aer Lingus
Find Deal
Fri, Sep 12 - Fri, Sep 19
 Logo
5:30 am - 3:45 pmSEA-SOU
26h 15m3 stops
 Logo
8:00 pm - 7:31 pmSOU-SEA
31h 31m2 stops
Sun, Sep 14 - Wed, Sep 24
Aer Lingus Logo
7:35 pm - 8:15 amSEA-SOU
28h 40m1 stop
Aer Lingus Logo
9:10 am - 8:09 pmSOU-SEA
18h 59m2 stops
$873Aer Lingus
Find Deal
Fri, Sep 12 - Fri, Sep 19
Aer Lingus Logo
6:05 am - 8:40 amSEA-SOU
18h 35m2 stops
Aer Lingus Logo
9:40 am - 5:50 pmSOU-SEA
16h 10m1 stop
$921Aer Lingus
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 - 10:56 amSOU-SEA
34h 06m2 stops
$949Delta
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Tue, Nov 18 - Thu, Nov 27
Delta Logo
11:50 am - 5:00 pmSEA-SOU
21h 10m2 stops
Delta Logo
8:50 am - 10:56 amSOU-SEA
34h 06m2 stops
$953Delta
Find Deal
Wed, Sep 24 - Sat, Oct 11
Aer Lingus Logo
6:05 am - 8:40 amSEA-SOU
18h 35m2 stops
Aer Lingus Logo
4:25 pm - 5:50 pmSOU-SEA
33h 25m1 stop
$973Aer Lingus
Find Deal
Wed, Sep 24 - Sat, Oct 11
Aer Lingus Logo
7:35 pm - 7:30 pmSEA-SOU
15h 55m1 stop
Aer Lingus Logo
4:25 pm - 5:50 pmSOU-SEA
33h 25m1 stop
$976Aer Lingus
Find Deal
Wed, Sep 24 - Sat, Oct 11
Aer Lingus Logo
7:35 pm - 4:35 pmSEA-SOU
13h 00m1 stop
Aer Lingus Logo
4:25 pm - 5:50 pmSOU-SEA
33h 25m1 stop
$977Aer Lingus
Find Deal
Sat, Sep 13 - Sat, Sep 20
KLM Logo
2:10 pm - 8:45 amSEA-SOU
34h 35m1 stop
KLM Logo
6:05 pm - 11:45 amSOU-SEA
25h 40m1 stop
$1,097KLM
Find Deal
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 Aer Lingus ($825) and Delta ($949).

Good to know

Cheapest flight$369
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 $369 for a one-way ticket and $825 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.

  • Which is the best airline for flights from Seattle to Southampton, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from Seattle to Southampton are Delta and KLM. With an average price for the route of $836 and an overall rating of 8.0, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $1,281 and an overall rating of 7.8.

  • 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 airlines 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.
8.0
DeltaOverall score based on 7980 reviews
7.9Comfort
8.2Boarding
7.3Food
8.5Crew
7.9Entertainment
Airline reviews

Delayed and took off even later than the scheduled delay time

8.0 ExcellentAnonymous, Jul 2025DTW - SEA
Read more Delta reviews

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Only issue was with seating. The economy fare we purchased did say there was no guarantee the three people in our party would be seated together, and we were not. At the gate, the agent told us more specifically, the fare we purchased meant we would be seated in middle seats only. This should just be made more obvious.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

Flight was canceled, and no effort was made to help with rebooking, no hotel vouchers, no car transportation and minimal food voucher and most places for food were closed by the time the voucher was given. Waited for 3 hours for bags. Simply the worst travel experience I have ever had

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

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

You should not have to pay for WiFi in business class

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

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

Information on your arrival and departure airports

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