HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Southampton

$344+ Cheap flights from Seattle (SEA) to Southampton (SOU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOU
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Southampton with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Seattle to Southampton

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Southampton (SOU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2025.

Round-trip from

$983
(Mytrip)

One-way from

$344
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,028
From Seattle/Tacoma Intl to Southampton Eastleigh
Search Deals
One-way flight from Seattle/Tacoma Intl to Southampton Eastleigh
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($147 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find flight deals from Seattle to Southampton

Cheapest flights from Seattle to Southampton
Explore the most affordable flight options available from Seattle to Southampton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/267:00 pmSEA - SOU
2 stops18h 00mMultiple Airlines
Sat 8/28:25 amSOU - SEA
2 stops20h 15mMultiple Airlines
Deal found 6/11$983
This Gurufare deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/267:35 pmSEA - SOU
1 stop29h 35mAer Lingus
Sat 8/24:25 pmSOU - SEA
1 stop33h 25mAer Lingus
Deal found 6/11$1,083
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/510:15 pmSEA - SOU
2 stops26h 30mDelta
Tue 7/156:25 pmSOU - SEA
1 stop25h 10mDelta
Deal found 6/11$1,267
This British Airways deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/238:20 pmSEA - SOU
2 stops15h 05mBritish Airways
Wed 10/89:10 amSOU - SEA
1 stop16h 40mBritish Airways
Deal found 6/10$2,242

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Southampton that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from Seattle to Southampton that are best for you.

Fly from

Seattle

Fly to

Southampton

Route

Depart

Return

Price

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 7/26

7:00 pm-9:00 pm

2 stops18h 00m

Southampton Eastleigh

Sat 8/2

8:25 am-8:40 pm

2 stops20h 15m

$983

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 7/26

7:35 pm-9:10 am

1 stop29h 35m

Southampton Eastleigh

Sat 8/2

4:25 pm-5:50 pm

1 stop33h 25m

$1,083

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 7/5

10:15 pm-8:45 am

2 stops26h 30m

Southampton Eastleigh

Wed 7/16

9:20 am-3:50 pm

1 stop14h 30m

$1,267

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 9/23

8:20 pm-7:25 pm

2 stops15h 05m

Southampton Eastleigh

Wed 10/8

9:10 am-5:50 pm

1 stop16h 40m

$2,242

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 7/26

11:30 pm-8:40 am

2 stops49h 10m

$344

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 7/26

7:35 pm-9:10 am

1 stop29h 35m

$517

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 9/21

1:55 pm-8:45 am

1 stop34h 50m

$550

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 11/1

4:00 pm-8:25 am

1 stop33h 25m

$623

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Best time to book a flight from Seattle to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Seattle to Southampton?

Currently, November is the cheapest month in which you can book a flight from Seattle to Southampton (average of $787). Flying from Seattle to Southampton in June is currently the most expensive (average of $1,308). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to SOU?

Find hourly flight availability from Seattle to Southampton. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

When flying from Seattle to Southampton, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 10% versus a flight in the evening.

Rainfall in Southampton by month

Plan your trip to Southampton by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Southampton ranges from 1.0 - 3.0 inches per month. December is typically the wettest month, when rainfall can reach 3.0 in. July is typically the driest time to visit Southampton when rainfall is around 1.0 in.

Temperature in Southampton by month

Plan your trip to Southampton by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Southampton, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Southampton

Get insights into the airlines that provide service to Southampton. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Southampton. Reviews last updated June 12, 2025.
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Aer Lingus
7.1
Good
1,117 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
British Airways
6.6
Okay
7,008 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Seattle to Southampton. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Seattle to Southampton round-trip?

    Aer Lingus, at $1,083, was found to be the cheapest airline from Seattle to Southampton.Alternate airlines to your destination round-trip include Delta and British Airways.

  • What are the cheapest airlines to fly from Seattle to Southampton one-way?

    To fly one-way, consider booking your trip with Aer Lingus, which is currently one of the cheapest options available, starting at $517. Delta flights start at $550 while deals on KLM start at $623 one-way.

  • Can I find deals for flights from Seattle to Southampton that include hotel bookings?

    Yes. In addition to deals on Seattle to Southampton flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Southampton?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Southampton.

  • Can I find deals for business class flights from Seattle to Southampton?

    Yes. Cheapflights offers flight deals from Seattle to Southampton by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Southampton?

    Currently, November is the cheapest month in which you can book a flight from Seattle to Southampton (average of $787). Flying from Seattle to Southampton in June is currently the most expensive (average of $1,308). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Southampton

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Heathrow flights
Seattle to Gatwick flights
Portland to Heathrow flights
Seattle to London City flights
Portland to Gatwick flights
Seattle to Edinburgh flights
Portland to London City flights
Seattle to Stansted flights
Seattle to Luton flights
Seattle to Manchester flights
Portland to Edinburgh flights
Spokane to Heathrow flights
Portland to Stansted flights
Portland to Luton flights
Spokane to Edinburgh flights
Spokane to Gatwick flights
Seattle to Birmingham flights
Portland to Manchester flights
Spokane to London City flights
Pasco to Heathrow flights
Portland to Bristol flights
Seattle to Leeds flights
Spokane to Manchester flights
Seattle to Bristol flights
Seattle to Newcastle upon Tyne flights
Bellingham to Heathrow flights
Walla Walla to Heathrow flights
Seattle to Newquay flights
Seattle to Southend flights
Portland to Leeds flights
Seattle to Liverpool flights
Bellingham to Gatwick flights
Seattle to Grimsby flights
Spokane to Southampton flights
Seattle to Darlington flights
Portland to Southend flights

Top 3 airlines flying from Seattle to Southampton

Discover the top 3 airlines that operate flights from Seattle to Southampton. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$794Average$836FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$840Average$1,281FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$944Average$1,495FlexibilityNo cancel feeOn-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.