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$538+ 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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOU
Jun 23 — Jun 301
Mon 6/23
Mon 6/30
1 adult, Economy
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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 18, 2025.

Round-trip from

$909
(Delta)

One-way from

$538
(KAYAK)

Popular in

June

Cheapest in

October

Average price

$1,031
From Seattle/Tacoma Intl to Southampton Eastleigh
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One-way flight from Seattle/Tacoma Intl to Southampton Eastleigh
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Highest demand for flights based on searches. 15% potential increase in price ($146 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 18, 2025.

This Delta deal was found by Cheapflights users on 6/17. 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.
Mon 8/255:40 pmSEA - SOU
1 stop31h 05mDelta
Wed 9/109:20 amSOU - SEA
1 stop14h 45mDelta
Deal found 6/17$909
This Gurufare deal was found by Cheapflights users on 6/17. 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.
Fri 8/17:35 pmSEA - SOU
1 stop29h 00mAer Lingus
Fri 8/89:40 amSOU - SEA
2 stops22h 00mAer Lingus
Deal found 6/17$1,069
This KLM deal was found by Cheapflights users on 6/17. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/11:55 pmSEA - SOU
1 stop19h 05mKLM
Fri 8/89:20 amSOU - SEA
1 stop14h 35mKLM
Deal found 6/17$1,173
This Mytrip deal was found by Cheapflights users on 6/17. 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.
Fri 8/15:30 amSEA - SOU
2 stops26h 15mMultiple Airlines
Fri 8/84:15 pmSOU - SEA
3 stops32h 10mMultiple Airlines
Deal found 6/17$1,253
This British Airways deal was found by Cheapflights users on 6/17. 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.
Wed 8/271:30 pmSEA - SOU
2 stops18h 30mBritish Airways
Wed 9/109:10 amSOU - SEA
1 stop16h 40mBritish Airways
Deal found 6/17$2,243

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 18, 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

Mon 8/25

5:40 pm-8:45 am

1 stop31h 05m

Southampton Eastleigh

Mon 9/8

5:35 pm-4:05 pm

1 stop30h 30m

$909

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Fri 8/1

7:35 pm-8:35 am

1 stop29h 00m

Southampton Eastleigh

Fri 8/8

9:40 am-11:40 pm

2 stops22h 00m

$1,069

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Fri 8/1

1:55 pm-5:00 pm

1 stop19h 05m

Southampton Eastleigh

Fri 8/8

9:20 am-3:55 pm

1 stop14h 35m

$1,173

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Fri 8/1

5:30 am-3:45 pm

2 stops26h 15m

Southampton Eastleigh

Fri 8/8

4:15 pm-4:25 pm

3 stops32h 10m

$1,253

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 8/27

1:30 pm-4:00 pm

2 stops18h 30m

Southampton Eastleigh

Wed 9/10

9:10 am-5:50 pm

1 stop16h 40m

$2,243

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 11/1

10:46 am-7:40 pm

2 stops25h 54m

$538

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 9/21

5:40 pm-8:45 am

1 stop31h 05m

$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 6/18

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 18, 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 18, 2025.
Delta
8.0
Very good
7,964 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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
7,964 reviews
Delta
8.0
Very good
7,964 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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
1,364 reviews
Delta
8.0
Very good
7,964 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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
1,120 reviews
Delta
8.0
Very good
7,964 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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
7,031 reviews
Delta
8.0
Very good
7,964 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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?

    Delta, at $909, was found to be the cheapest airline from Seattle to Southampton.Alternate airlines to your destination round-trip include Aer Lingus and KLM.

  • 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 $538. 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

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Alternative routes for Seattle to Southampton

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Seattle to Southampton

Discover the top 2 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 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$794Average$836FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$840Average$1,281FlexibilityNo cancel feeOn-time75%

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