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$528+ Cheap flights from Southampton (SOU) to Washington

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 3/8. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
Mar 8 — Mar 151
Sun 3/8
Sun 3/15
1 adult, Economy
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Cheap flight deals from Southampton to Washington

Cheapest flights from Southampton to Washington
Explore the most affordable flight options available from Southampton to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 6, 2026.

This Expedia deal was found by Cheapflights users on 2/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/235:40 pm
SOU
-
SEA
2 stops35h 42m
KLM
Mon 3/305:30 pm
SEA
-
SOU
1 stop31h 05m
KLM
Deal found 2/6$902
This ChecknFly deal was found by Cheapflights users on 2/6. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/239:30 am
SOU
-
SEA
1 stop16h 50m
Aer Lingus
Mon 3/306:55 pm
SEA
-
SOU
1 stop16h 35m
Aer Lingus
Deal found 2/6$955
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/412:25 pm
SOU
-
SEA
1 stop13h 55m
British Airways
Sun 3/89:05 pm
SEA
-
SOU
1 stop15h 35m
British Airways
Deal found 2/2$1,038

Find flight deals from Southampton to Washington

Keep the following information in mind while searching for Southampton to Washington flight deals. Data was last updated February 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,038
(British Airways)

One-way from

$528
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$616
Provider with most accurate pricing for London (LON)-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for London (LON)-Seattle/Tacoma Intl flights.
Search Deals
From Southampton Eastleigh to Washington
Search Deals
One-way flight from Southampton Eastleigh to Washington
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($109 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 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 Southampton to Washington 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 6, 2026.
Use the filters below to find and compare flights from Southampton to Washington that are best for you.

Fly from

Southampton

Fly to

Washington

Route

Depart

Return

Price

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 3/23

5:40 pm-10:22 pm

2 stops35h 42m

Seattle/Tacoma Intl

Mon 3/30

10:58 pm-4:50 pm

2 stops33h 52m

$902

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 3/23

9:30 am-7:20 pm

1 stop16h 50m

Seattle/Tacoma Intl

Mon 3/30

6:55 pm-7:30 pm

1 stop16h 35m

$955

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 3/4

12:25 pm-6:20 pm

1 stop13h 55m

Seattle/Tacoma Intl

Sun 3/8

9:05 pm-7:40 pm

1 stop15h 35m

$1,038

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 3/8

8:10 pm-7:20 pm

1 stop30h 10m

$630

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 3/8

8:10 pm-6:00 pm

2 stops28h 50m

$630

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 3/23

9:30 am-7:20 pm

1 stop16h 50m

$707

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 6/21

8:45 pm-11:35 am

2 stops22h 50m

$752

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 6/23

9:10 am-5:10 pm

1 stop16h 00m

$774

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 6/16

7:55 pm-11:35 am

2 stops23h 40m

$781

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

Best time to book a flight from Southampton to Washington

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

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

Currently, March is the cheapest month in which you can book a flight from Southampton to State of Washington (average of $407). Flying from Southampton to State of Washington in August is currently the most expensive (average of $617). 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 Southampton to Washington. 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 from for flights from Southampton to Washington?

    Most people fly from Southampton Eastleigh (SOU) if they book a flight from Southampton to Washington. Southampton Eastleigh is conveniently located just 3.5 mi from Southampton’s city center.

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

    Departing from Southampton to State of Washington will take you 13h 55m. The distance between Southampton and State of Washington is about 4787 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Southampton to State of Washington (average of $407). Flying from Southampton to State of Washington in August is currently the most expensive (average of $617). 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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