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$547+ 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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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Cheap flight deals from Southampton to Washington

Keep the following information in mind while searching for Southampton to Washington flight deals. Data was last updated November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$643
(Virgin Atlantic)

One-way from

$547
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$716
Provider with most accurate pricing for London (LON)-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for London (LON)-Seattle/Tacoma Intl flights.
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From Southampton Eastleigh to Washington
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One-way flight from Southampton Eastleigh to Washington
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Highest demand for flights based on searches. 12% potential increase in price ($103 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Southampton to Washington

Best flights from Southampton to Washington
Discover carefully curated flight deals from Southampton to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 3, 2025.

This Virgin Atlantic deal was found by Cheapflights users on 11/1. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/45:30 pmSOU - SEA
1 stop26h 05mVirgin Atlantic
Sun 3/87:20 amSEA - SOU
2 stops26h 40mVirgin Atlantic
Deal found 11/1$643

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 November 3, 2025.
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

Wed 3/4

5:30 pm-11:35 am

1 stop26h 05m

Seattle/Tacoma Intl

Sun 3/8

7:20 am-5:00 pm

2 stops26h 40m

$643

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 3/23

7:55 pm-10:28 am

2 stops45h 33m

$547

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 2/15

4:05 pm-6:20 pm

1 stop34h 15m

$591

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 3/23

4:05 pm-12:30 pm

2 stops27h 25m

$608

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 2/15

6:20 pm-5:00 pm

3 stops30h 40m

$632

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 3/23

9:30 am-7:20 pm

1 stop16h 50m

$670

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 11/10

9:30 am-6:20 pm

1 stop16h 50m

$873

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

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 $410). 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 26h 05m. The distance between Southampton and State of Washington is about 4787 mi.

  • 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 $410). 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.

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