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Southampton

$816+ 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOU
Mar 4 — Mar 111
Wed 3/4
Wed 3/11
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 February 2, 2026.

This Delta deal was found by Cheapflights users on 2/1. 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 3/186:15 am
SEA
-
SOU
2 stops19h 05m
Delta
Wed 3/255:35 pm
SOU
-
SEA
1 stop26h 00m
Delta
Deal found 2/1$816
This Delta deal was found by Cheapflights users on 2/1. 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 4/55:30 pm
SEA
-
SOU
1 stop31h 05m
Delta
Sun 4/125:20 pm
SOU
-
SEA
1 stop26h 25m
Delta
Deal found 2/1$823
This KLM deal was found by Cheapflights users on 2/1. 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.
Wed 3/187:30 am
SEA
-
SOU
2 stops17h 50m
KLM
Wed 3/258:50 am
SOU
-
SEA
2 stops20h 25m
KLM
Deal found 2/1$826
This Delta deal was found by Cheapflights users on 2/1. 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 4/66:00 am
SEA
-
SOU
2 stops18h 35m
Delta
Sun 4/125:20 pm
SOU
-
SEA
1 stop26h 25m
Delta
Deal found 2/1$828
This Trip.com deal was found by Cheapflights users on 2/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/1911:50 am
SEA
-
SOU
2 stops22h 10m
Virgin Atlantic
Thu 3/266:05 pm
SOU
-
SEA
2 stops29h 42m
Virgin Atlantic
Deal found 2/2$856
This Delta deal was found by Cheapflights users on 2/1. 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 4/51:45 pm
SEA
-
SOU
1 stop19h 05m
Delta
Sat 4/119:15 am
SOU
-
SEA
1 stop34h 30m
Delta
Deal found 2/1$876
This Delta deal was found by Cheapflights users on 2/1. 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 2/233:05 pm
SEA
-
SOU
1 stop17h 55m
Delta
Sat 3/75:30 pm
SOU
-
SEA
1 stop26h 05m
Delta
Deal found 2/1$957
This Delta deal was found by Cheapflights users on 2/1. 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 2/238:30 am
SEA
-
SOU
2 stops24h 30m
Delta
Fri 3/68:50 am
SOU
-
SEA
1 stop34h 45m
Delta
Deal found 2/1$961
This Ovago deal was found by Cheapflights users on 2/1. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/189:05 pm
SEA
-
SOU
1 stop15h 35m
Multiple Airlines
Wed 3/2512:25 pm
SOU
-
SEA
1 stop13h 55m
Multiple Airlines
Deal found 2/1$978

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 February 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$816
(Delta)

Popular in

June

Cheapest in

October

Average price

$657
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 ($140 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 February 2, 2026.
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

Wed 3/18

6:15 am-8:20 am

2 stops19h 05m

Southampton Eastleigh

Wed 3/25

5:35 pm-12:35 pm

1 stop26h 00m

$816

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 4/6

1:45 pm-4:50 pm

1 stop19h 05m

Southampton Eastleigh

Sun 4/12

5:20 pm-4:30 pm

1 stop31h 10m

$823

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 4/5

5:30 pm-8:35 am

1 stop31h 05m

Southampton Eastleigh

Sun 4/12

5:20 pm-11:45 am

1 stop26h 25m

$823

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 3/18

7:30 am-8:20 am

2 stops17h 50m

Southampton Eastleigh

Wed 3/25

8:50 am-10:15 pm

2 stops20h 25m

$826

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 4/7

7:15 am-8:35 am

2 stops17h 20m

Southampton Eastleigh

Sun 4/12

5:20 pm-11:45 am

1 stop26h 25m

$828

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Thu 3/19

11:50 am-5:00 pm

2 stops22h 10m

Southampton Eastleigh

Thu 3/26

6:05 pm-4:47 pm

2 stops29h 42m

$856

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 4/5

1:45 pm-4:50 pm

1 stop19h 05m

Southampton Eastleigh

Sat 4/11

9:15 am-11:45 am

1 stop34h 30m

$876

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 2/23

3:05 pm-5:00 pm

1 stop17h 55m

Southampton Eastleigh

Sat 3/7

5:30 pm-11:35 am

1 stop26h 05m

$957

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 2/23

3:05 pm-5:00 pm

1 stop17h 55m

Southampton Eastleigh

Fri 3/6

8:50 am-11:35 am

1 stop34h 45m

$957

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

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, May is the cheapest month in which you can book a flight from State of Washington to Southampton (average of $493). Flying from State of Washington to Southampton in June is currently the most expensive (average of $789). 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.

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 17h 50m. The distance from State of Washington to Southampton is about 4787 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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, May is the cheapest month in which you can book a flight from State of Washington to Southampton (average of $493). Flying from State of Washington to Southampton in June is currently the most expensive (average of $789). 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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