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$748+ Cheap flights from Washington to Southampton (SOU)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOU
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Washington to Southampton

Cheapest flights from Washington to Southampton
Explore the most affordable flight options available from Washington to Southampton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Delta deal was found by Cheapflights users on 12/16. 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.
Wed 12/173:05 pmSEA - SOU
1 stop33h 00mDelta
Mon 1/195:35 pmSOU - SEA
1 stop26h 15mDelta
Deal found 12/16$1,612
This Delta deal was found by Cheapflights users on 12/16. 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.
Wed 12/177:10 amSEA - SOU
2 stops26h 15mDelta
Thu 1/159:00 amSOU - SEA
1 stop34h 50mDelta
Deal found 12/16$1,616
This Delta deal was found by Cheapflights users on 12/16. 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.
Wed 12/173:05 pmSEA - SOU
1 stop33h 00mDelta
Fri 1/169:00 amSOU - SEA
2 stops21h 25mDelta
Deal found 12/16$1,622
This Delta deal was found by Cheapflights users on 12/16. 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.
Wed 12/173:05 pmSEA - SOU
1 stop33h 00mDelta
Sat 1/179:25 amSOU - SEA
1 stop34h 25mDelta
Deal found 12/16$1,662
This Delta deal was found by Cheapflights users on 12/16. 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.
Wed 12/173:05 pmSEA - SOU
1 stop33h 00mDelta
Sun 1/185:45 pmSOU - SEA
2 stops36h 40mDelta
Deal found 12/16$1,672
This Delta deal was found by Cheapflights users on 12/16. 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.
Thu 12/183:05 pmSEA - SOU
1 stop33h 45mDelta
Thu 1/155:35 pmSOU - SEA
1 stop26h 15mDelta
Deal found 12/16$1,682
This Delta deal was found by Cheapflights users on 12/16. 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.
Thu 12/185:25 amSEA - SOU
2 stops27h 35mDelta
Mon 1/199:25 amSOU - SEA
1 stop34h 25mDelta
Deal found 12/16$1,686
This Delta deal was found by Cheapflights users on 12/16. 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.
Thu 12/183:05 pmSEA - SOU
1 stop33h 45mDelta
Fri 1/169:00 amSOU - SEA
2 stops20h 49mDelta
Deal found 12/16$1,692

Find flight deals from Washington to Southampton

Keep the following information in mind while searching for Washington to Southampton flight deals. Data was last updated December 18, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$748
(Delta)

Popular in

June

Cheapest in

November

Average price

$986
Provider with most accurate pricing for Seattle/Tacoma Intl-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-London (LON) flights.
Search Deals
From Washington to Southampton Eastleigh
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($139 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 December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 December 18, 2025.
Use the filters below to find and compare flights from Washington to Southampton that are best for you.

Fly from

Washington

Fly to

Southampton

Route

Depart

Return

Price

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 3/9

4:00 pm-5:00 pm

1 stop18h 00m

Southampton Eastleigh

Tue 3/17

5:35 pm-12:35 pm

1 stop26h 00m

$748

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 3/8

4:00 pm-8:10 am

1 stop33h 10m

Southampton Eastleigh

Mon 3/23

5:35 pm-12:35 pm

1 stop26h 00m

$748

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 3/7

3:05 pm-5:15 pm

1 stop18h 10m

Southampton Eastleigh

Mon 3/23

5:35 pm-12:35 pm

1 stop26h 00m

$748

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 3/8

4:00 pm-8:10 am

1 stop33h 10m

Southampton Eastleigh

Tue 3/17

5:35 pm-12:35 pm

1 stop26h 00m

$748

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 3/7

3:05 pm-5:15 pm

1 stop18h 10m

Southampton Eastleigh

Wed 3/18

8:40 am-12:35 pm

1 stop34h 55m

$748

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 3/8

4:00 pm-8:10 am

1 stop33h 10m

Southampton Eastleigh

Wed 3/18

5:35 pm-12:35 pm

1 stop26h 00m

$748

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 3/7

7:30 am-5:15 pm

2 stops25h 45m

Southampton Eastleigh

Tue 3/17

5:35 pm-12:35 pm

1 stop26h 00m

$752

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 3/10

10:59 pm-5:25 pm

2 stops35h 26m

Southampton Eastleigh

Mon 3/23

5:35 pm-12:35 pm

1 stop26h 00m

$752

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Fri 1/30

7:10 am-8:45 am

2 stops17h 35m

Southampton Eastleigh

Fri 2/6

5:35 pm-11:40 am

1 stop26h 05m

$752

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 3/10

7:20 am-8:10 am

2 stops17h 50m

Southampton Eastleigh

Tue 3/17

5:35 pm-12:35 pm

1 stop26h 00m

$752

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 11 results
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Best time to book a flight from Washington to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton from Washington 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 Washington to Southampton

What is the cheapest month to book a flight from State of Washington to Southampton?

Currently, January is the cheapest month in which you can book a flight from State of Washington to Southampton (average of $491). Flying from State of Washington to Southampton in June is currently the most expensive (average of $790). 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 WA to SOU?

Find hourly flight availability from Washington 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 December 18, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 20% on flights from State of Washington to Southampton by exploring options for tickets in the evening.

Related info for your journey

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

  • What airport do you fly into for flights to Southampton from Washington?

    If you book a flight to Southampton from Washington, you will be flying to Eastleigh, which is the city’s only airport. Southampton Eastleigh (SOU) is located 3.5 mi from the center of Southampton.

  • How long is the flight from State of Washington to Southampton?

    Departing from State of Washington to Southampton will take you 18h. The distance from State of Washington to Southampton is about 4787 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Southampton?

    Currently, January is the cheapest month in which you can book a flight from State of Washington to Southampton (average of $491). Flying from State of Washington to Southampton in June is currently the most expensive (average of $790). 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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