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$544+ 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOU
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,060
(Delta)

One-way from

$544
(Delta)

Popular in

June

Cheapest in

January

Average price

$1,160
Provider with most accurate pricing for Seattle/Tacoma Intl-Southampton Eastleigh flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Southampton Eastleigh flights.
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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. 43% potential increase in price ($1,112 potential increase over avg. RT price).
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Cheapest flight prices on average. 37% potential price decrease ($395 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 28, 2025.

This Delta deal was found by Cheapflights users on 3/27. 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.
Sun 5/116:07 pmSEA - SOU
1 stop30h 43mDelta
Thu 5/295:35 pmSOU - SEA
1 stop30h 22mDelta
Deal found 3/27$1,060
This British Airways deal was found by Cheapflights users on 3/27. 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.
Sat 4/261:35 pmSEA - SOU
2 stops21h 50mBritish Airways
Sat 5/39:40 amSOU - SEA
1 stop15h 19mBritish Airways
Deal found 3/27$2,373
This Kiwi.com deal was found by Cheapflights users on 3/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/93:45 pmSEA - SOU
2 stops16h 00mMultiple Airlines
Fri 5/168:00 pmSOU - SEA
1 stop28h 59mMultiple Airlines
Deal found 3/28$6,700
This Virgin Atlantic deal was found by Cheapflights users on 3/28. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/91:55 pmSEA - SOU
1 stop19h 35mVirgin Atlantic
Fri 5/169:20 amSOU - SEA
1 stop14h 37mVirgin Atlantic
Deal found 3/28$7,899
This Gotogate deal was found by Cheapflights users on 3/28. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/911:59 pmSEA - SOU
2 stops49h 11mAer Lingus
Fri 5/169:40 amSOU - SEA
2 stops16h 40mAer Lingus
Deal found 3/28$8,105

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 March 28, 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

Sun 5/11

6:07 pm-8:50 am

1 stop30h 43m

Southampton Eastleigh

Thu 5/29

5:35 pm-3:57 pm

1 stop30h 22m

$1,060

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 4/26

1:35 pm-7:25 pm

2 stops21h 50m

Southampton Eastleigh

Sat 5/3

9:40 am-4:59 pm

1 stop15h 19m

$2,373

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Fri 5/9

3:45 pm-3:45 pm

2 stops16h 00m

Southampton Eastleigh

Fri 5/16

8:00 pm-4:59 pm

1 stop28h 59m

$6,700

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Fri 5/9

1:55 pm-5:30 pm

1 stop19h 35m

Southampton Eastleigh

Fri 5/16

9:20 am-3:57 pm

1 stop14h 37m

$7,899

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Fri 5/9

11:59 pm-9:10 am

2 stops49h 11m

Southampton Eastleigh

Fri 5/16

9:40 am-6:20 pm

2 stops16h 40m

$8,105

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 9/21

1:55 pm-5:00 pm

1 stop19h 05m

$544

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 7/9

6:45 pm-7:30 pm

1 stop16h 45m

$610

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Compare providers for flights from Seattle to Southampton

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Southampton in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Southampton flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Southampton flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Southampton flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Southampton flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Southampton flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 March 28, 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 March 28, 2025.
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,896 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
634 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.0
Good
1,062 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
6,712 reviews
Delta
8.0
Very good
7,896 reviews

Crew

8.5

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 $1,060, was found to be the cheapest airline from Seattle to Southampton.Alternate airlines to your destination round-trip include British Airways and Virgin Atlantic. Delta is 27% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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

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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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$738Average$1,151FlexibilityNo cancel feeOn-time75%
DeltaCheapest$794Average$865FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$944Average$1,495FlexibilityNo cancel feeOn-time70%
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