Find flights
When to book
FAQs

Cheap flights from Washington to Southampton from £457

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 18/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOU
20 Jan — 27 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to Southampton

Enter your travel dates to find the best prices.

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 21 December 2025.

Mon 22/1219:30SEA - SOU
2 stops37h 30mDelta
Sun 11/117:45SOU - SEA
1 stop26h 05mDelta
Deal found 19/12£839
Wed 24/1219:30SEA - SOU
2 stops37h 30mDelta
Sun 11/117:45SOU - SEA
1 stop26h 05mDelta
Deal found 19/12£846
Tue 23/1215:05SEA - SOU
1 stop17h 55mDelta
Sun 11/117:45SOU - SEA
1 stop26h 05mDelta
Deal found 19/12£1,028
Fri 19/1215:30SEA - SOU
2 stops33h 20mDelta
Thu 15/109:00SOU - SEA
1 stop34h 50mDelta
Deal found 19/12£1,613

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 21 December 2025.

Round-trip from

£570

One-way from

£457

Popular in

June

Cheapest in

November

Average price

£737
KLM
  • KLM
  • 13/4-21/4
  • 2 total stops
  • 65h 45m total
  • Washington to Southampton
Search Deals
Aer Lingus
  • Aer Lingus
  • 18/6
  • 1 total stop
  • 16h 45m total
  • Washington to Southampton
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£77 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 21 December 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 13/4

17:30-08:35

1 stop31h 05m

Southampton Eastleigh

Tue 21/4

09:05-11:45

1 stop34h 40m

£570

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 13/4

09:30-16:50

2 stops23h 20m

Southampton Eastleigh

Tue 21/4

09:05-20:43

2 stops19h 38m

£581

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 21/4

18:45-19:30

1 stop16h 45m

Southampton Eastleigh

Thu 30/4

09:10-16:59

1 stop15h 49m

£774

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Thu 5/2

18:50-09:45

2 stops30h 55m

Southampton Eastleigh

Mon 9/2

08:40-16:55

2 stops40h 15m

£4,392

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Thu 18/6

18:45-19:30

1 stop16h 45m

£457

Flights are sorted by cheapest return flights first.

Deals found on 20/12

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 return 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 £367). Flying from State of Washington to Southampton in June is currently the most expensive (average of £590). 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?

    Southampton Eastleigh (SOU), located 3.5 mi from the city center, is the airport you fly into when you book flights from Washington to Southampton.

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

    Airlines like KLM, Delta, and Aer Lingus fly from State of Washington to Southampton in about 16h 45m. The time it takes to get you to your destination can typically vary by up to 14h 20m. 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 direct 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 holiday 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 £367). Flying from State of Washington to Southampton in June is currently the most expensive (average of £590). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to Southampton

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Gatwick flights
Dulles Intl to Heathrow flights
Newark to Gatwick flights
Boston to Heathrow flights
LaGuardia to Heathrow flights
John F Kennedy Intl to London City flights
Los Angeles to Heathrow flights
O'Hare Intl to Heathrow flights
John F Kennedy Intl to Stansted flights
San Francisco to Heathrow flights
LaGuardia to Gatwick flights
Baltimore to Heathrow flights
Seattle to Heathrow flights
Dallas/Fort Worth to Heathrow flights
Newark to Stansted flights
Newark to London City flights
Miami to Heathrow flights
Newark to Luton flights
Dulles Intl to Gatwick flights
Orlando to Heathrow flights
Atlanta to Heathrow flights
Boston to Gatwick flights
Hobby to Heathrow flights
Reagan-National to Heathrow flights
Denver to Heathrow flights
Dulles Intl to London City flights
Boston to London City flights
Philadelphia to Heathrow flights
O'Hare Intl to Gatwick flights
Minneapolis to Heathrow flights
Baltimore to Gatwick flights
Los Angeles to Gatwick flights
Reagan-National to Gatwick flights
O'Hare Intl to London City flights
San Francisco to Gatwick flights
George Bush Intcntl to Heathrow flights
Los Angeles to London City flights
Tampa to Heathrow flights
Detroit to Heathrow flights
Charlotte to Heathrow flights
Newark to Edinburgh flights
O'Hare Intl to Stansted flights
Boston to Stansted flights
San Francisco to London City flights
Raleigh to Heathrow flights
Seattle to Gatwick flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Washington to Southampton?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Southampton from Washington today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Washington to Southampton?

Cheapflights simply makes it quick and affordable to book flights from Washington to Southampton by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Washington to Southampton with no change fees?

Yes, we can. To see specific flights from Washington to Southampton with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Washington to Southampton become cheaper?

Of course! You can now track prices for flights from Washington to Southampton and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.