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Cheap flights from Southampton to Washington from £391

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 30/5. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — SEA
15 Mar — 22 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Southampton to Washington

Enter your travel dates to find the best prices.

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 13 February 2026.

Mon 30/309:05
SOU
-
SEA
1 stop34h 40m
KLM
Mon 6/413:45
SEA
-
SOU
1 stop34h 50m
KLM
Deal found 13/2£689
Mon 30/309:05
SOU
-
SEA
1 stop34h 40m
Virgin Atlantic
Mon 6/419:35
SEA
-
SOU
2 stops53h 00m
Virgin Atlantic
Deal found 13/2£716
Thu 5/318:05
SOU
-
SEA
1 stop25h 30m
Delta
Thu 2/407:15
SEA
-
SOU
2 stops17h 20m
Delta
Deal found 9/2£737
Wed 4/312:25
SOU
-
SEA
1 stop13h 55m
British Airways
Sun 8/321:05
SEA
-
SOU
1 stop15h 35m
British Airways
Deal found 12/2£781
Wed 18/216:05
SOU
-
SEA
2 stops32h 50m
Aer Lingus
Wed 25/220:05
SEA
-
SOU
1 stop28h 40m
Aer Lingus
Deal found 12/2£790

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 13 February 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 30/3

09:05-11:45

1 stop34h 40m

Seattle/Tacoma Intl

Mon 6/4

13:45-08:35

1 stop34h 50m

£689

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 30/3

09:05-11:45

1 stop34h 40m

Seattle/Tacoma Intl

Mon 6/4

19:35-08:35

2 stops53h 00m

£716

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 5/3

18:05-11:35

1 stop25h 30m

Seattle/Tacoma Intl

Thu 2/4

07:15-08:35

2 stops17h 20m

£737

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 5/3

18:05-11:35

1 stop25h 30m

Seattle/Tacoma Intl

Thu 2/4

17:30-08:45

1 stop31h 15m

£737

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 4/3

12:25-18:20

1 stop13h 55m

Seattle/Tacoma Intl

Sun 8/3

21:05-19:40

1 stop15h 35m

£781

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 30/5

06:50-16:00

3 stops41h 10m

£391

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 29/5

09:25-23:05

3 stops45h 40m

£426

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sun 19/4

20:45-11:35

2 stops22h 50m

£498

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Fri 29/5

09:10-17:10

1 stop16h 00m

£502

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Mon 23/3

09:30-19:20

1 stop16h 50m

£522

Flights are sorted by cheapest return flights first.

Deals found on 12/2

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 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 Southampton to Washington

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

Currently, January is the cheapest month in which you can book a flight from Southampton to State of Washington (average of £343). Flying from Southampton to State of Washington in August is currently the most expensive (average of £458). 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?

    Southampton Eastleigh (SOU) is the airport you will fly out of if you book a flight from Southampton to Washington. It is only a 3.5 mi journey to Eastleigh (SOU) 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 25h 30m. The distance from Southampton to State of Washington is about 4787 mi. This flight may include one or multiple stops.

  • 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 holiday 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, January is the cheapest month in which you can book a flight from Southampton to State of Washington (average of £343). Flying from Southampton to State of Washington in August is currently the most expensive (average of £458). 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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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 Southampton to Washington?

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 Washington from Southampton today with Cheapflights!

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Washington from Southampton.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Southampton to Washington, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Washington from Southampton today and book when prices fit your budget.

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