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Cheap flights from Washington to Southampton from £294

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 15/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOU
6 Mar — 13 Mar1
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 4 February 2026.

Sun 8/307:10
SEA
-
SOU
2 stops26h 55m
Delta
Sun 15/309:30
SOU
-
SEA
1 stop34h 05m
Delta
Deal found 3/2£553
Tue 10/1114:55
SEA
-
SOU
1 stop18h 05m
Delta
Mon 23/1108:40
SOU
-
SEA
1 stop35h 10m
Delta
Deal found 3/2£596
Sat 14/1123:53
SEA
-
SOU
2 stops24h 17m
Delta
Mon 23/1108:40
SOU
-
SEA
1 stop35h 10m
Delta
Deal found 3/2£600
Sun 5/417:30
SEA
-
SOU
1 stop31h 05m
Delta
Sun 12/417:20
SOU
-
SEA
1 stop26h 25m
Delta
Deal found 1/2£601
Sun 25/1015:55
SEA
-
SOU
1 stop18h 05m
Delta
Mon 2/1108:40
SOU
-
SEA
2 stops38h 10m
Delta
Deal found 3/2£604
Mon 6/406:00
SEA
-
SOU
2 stops18h 35m
Delta
Sun 12/417:20
SOU
-
SEA
1 stop26h 25m
Delta
Deal found 1/2£605
Mon 26/1006:00
SEA
-
SOU
2 stops19h 10m
Delta
Fri 6/1108:40
SOU
-
SEA
2 stops19h 47m
Delta
Deal found 3/2£607
Thu 19/311:50
SEA
-
SOU
2 stops22h 10m
Virgin Atlantic
Thu 26/318:05
SOU
-
SEA
2 stops29h 42m
Virgin Atlantic
Deal found 2/2£625
Thu 12/1114:55
SEA
-
SOU
1 stop18h 05m
Delta
Wed 18/1108:40
SOU
-
SEA
1 stop35h 10m
Delta
Deal found 3/2£633
Sun 5/413:45
SEA
-
SOU
1 stop19h 05m
Delta
Sat 11/409:15
SOU
-
SEA
1 stop34h 30m
Delta
Deal found 1/2£640

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 4 February 2026.

Round-trip from

£553

One-way from

£294

Popular in

June

Cheapest in

October

Average price

£480
Delta
  • Delta
  • 8/3-15/3
  • 2 total stops
  • 43h 50m total
  • Washington to Southampton
Search Deals
Aer Lingus
  • Aer Lingus
  • 15/3
  • 1 total stop
  • 15h 35m total
  • Washington to Southampton
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£74 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 February 2026
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 4 February 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

Sun 8/3

16:05-17:05

1 stop18h 00m

Southampton Eastleigh

Sun 15/3

17:45-12:35

1 stop25h 50m

£553

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 18/3

06:15-08:20

2 stops19h 05m

Southampton Eastleigh

Wed 25/3

17:35-12:35

1 stop26h 00m

£596

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 6/4

13:45-16:50

1 stop19h 05m

Southampton Eastleigh

Sun 12/4

17:20-16:30

1 stop31h 10m

£601

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 5/4

17:30-08:35

1 stop31h 05m

Southampton Eastleigh

Sun 12/4

17:20-11:45

1 stop26h 25m

£601

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 18/3

07:30-08:20

2 stops17h 50m

Southampton Eastleigh

Wed 25/3

08:50-22:15

2 stops20h 25m

£604

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 7/4

07:15-08:35

2 stops17h 20m

Southampton Eastleigh

Sun 12/4

17:20-11:45

1 stop26h 25m

£605

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Thu 19/3

11:50-17:00

2 stops22h 10m

Southampton Eastleigh

Thu 26/3

18:05-16:47

2 stops29h 42m

£625

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 5/4

13:45-16:50

1 stop19h 05m

Southampton Eastleigh

Sat 11/4

09:15-11:45

1 stop34h 30m

£640

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 8/3

08:00-17:05

3 stops26h 05m

Southampton Eastleigh

Sun 15/3

09:30-13:10

3 stops34h 40m

£697

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 23/2

15:05-17:00

1 stop17h 55m

Southampton Eastleigh

Sat 7/3

17:30-11:35

1 stop26h 05m

£699

Flights are sorted by cheapest return flights first.

Deals found on 4/2

Showing 1-10 of 13 results
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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, May is the cheapest month in which you can book a flight from State of Washington to Southampton (average of £360). Flying from State of Washington to Southampton in June is currently the most expensive (average of £577). 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 Delta fly from State of Washington to Southampton in about 18h. The time it takes to get you to your destination can typically vary by up to . The distance from State of Washington to Southampton is about 4787 mi.

  • 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, May is the cheapest month in which you can book a flight from State of Washington to Southampton (average of £360). Flying from State of Washington to Southampton in June is currently the most expensive (average of £577). 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

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Alternative routes for Washington to Southampton

See prices for flight routes from nearby airports that may be better suited for you.
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How does Cheapflights help users find flights from Washington to Southampton?

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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.

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