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Cheap flights from Washington to Southampton from £330

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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOU
17 Jun — 24 Jun1
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 18 May 2026.

Sun 11/1017:40
SEA
-
SOU
1 stop15h 10m
Delta
Wed 14/1009:05
SOU
-
SEA
1 stop15h 34m
Delta
Deal found 13/5£775
Wed 7/1012:00
SEA
-
SOU
2 stops36h 35m
Delta
Thu 15/1017:20
SOU
-
SEA
1 stop31h 19m
Delta
Deal found 13/5£778
Thu 8/1017:40
SEA
-
SOU
1 stop15h 10m
Delta
Wed 14/1009:05
SOU
-
SEA
1 stop15h 34m
Delta
Deal found 13/5£813
Wed 7/1012:00
SEA
-
SOU
2 stops36h 35m
Delta
Sun 18/1017:20
SOU
-
SEA
1 stop31h 19m
Delta
Deal found 13/5£816
Thu 19/1105:45
SEA
-
SOU
2 stops43h 10m
Delta
Mon 30/1117:30
SOU
-
SEA
1 stop26h 20m
Delta
Deal found 15/5£828
Fri 20/1106:05
SEA
-
SOU
2 stops26h 55m
Delta
Tue 1/1217:30
SOU
-
SEA
1 stop26h 20m
Delta
Deal found 15/5£848
Thu 8/1017:40
SEA
-
SOU
1 stop15h 10m
Delta
Sun 18/1017:20
SOU
-
SEA
1 stop31h 19m
Delta
Deal found 13/5£850
Sun 27/1214:35
SEA
-
SOU
1 stop33h 35m
Delta
Sat 9/109:25
SOU
-
SEA
2 stops20h 40m
Delta
Deal found 15/5£852
Mon 20/717:40
SEA
-
SOU
1 stop31h 05m
Delta
Tue 4/818:05
SOU
-
SEA
1 stop25h 32m
Delta
Deal found 14/5£881
Sat 4/711:15
GEG
-
SOU
2 stops21h 45m
KLM
Wed 15/709:15
SOU
-
GEG
2 stops19h 56m
KLM
Deal found 14/5£961
Sat 4/705:00
GEG
-
SOU
3 stops31h 55m
Multiple Airlines
Wed 15/709:20
SOU
-
GEG
2 stops19h 25m
Multiple Airlines
Deal found 14/5£1,395

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 18 May 2026.

Round-trip from

£775

One-way from

£330

Popular in

June

Cheapest in

January

Average price

£680
Delta
  • Delta
  • 13/10-20/10
  • 2 total stops
  • 41h 42m total
  • Washington to Southampton
Search Deals
12/6
  • 12/6
  • 3 total stops
  • 41h 35m total
  • Washington to Southampton
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£112 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 18 May 2026.
Use the filters below to find and compare flights from Washington to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 11/10

13:45-16:50

1 stop19h 05m

Southampton Eastleigh

Mon 19/10

17:20-11:52

1 stop26h 32m

£775

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 11/10

07:20-08:35

2 stops17h 15m

Southampton Eastleigh

Tue 20/10

17:20-11:52

1 stop26h 32m

£778

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 7/10

12:00-08:35

2 stops36h 35m

Southampton Eastleigh

Thu 15/10

17:20-16:39

1 stop31h 19m

£778

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 13/10

06:05-08:35

2 stops18h 30m

Southampton Eastleigh

Mon 19/10

17:20-11:52

1 stop26h 32m

£778

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Thu 23/7

13:45-17:35

1 stop19h 50m

Southampton Eastleigh

Thu 6/8

18:05-16:27

1 stop30h 22m

£919
Fastest return journey

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 20/7

17:40-17:35

1 stop15h 55m

Southampton Eastleigh

Mon 3/8

09:15-16:27

1 stop15h 12m

£934

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Thu 8/10

17:40-16:50

1 stop15h 10m

Southampton Eastleigh

Sat 17/10

17:20-11:52

1 stop26h 32m

£934

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Thu 9/7

17:40-17:35

1 stop15h 55m

Southampton Eastleigh

Tue 21/7

18:05-16:20

1 stop30h 15m

£938

SpokaneSouthampton

GEG - SOU

GEGSOU

Spokane

Sat 4/7

11:15-17:00

2 stops21h 45m

Southampton Eastleigh

Wed 15/7

09:15-21:11

2 stops19h 56m

£961

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 7/7

07:20-08:45

2 stops17h 25m

Southampton Eastleigh

Mon 20/7

18:05-20:34

2 stops34h 29m

£969

Flights are sorted by cheapest return flights first.

Deals found on 18/5

Showing 1-10 of 27 resultsSorted by cheapest first
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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
No data available for this route at this time. Please check back soon.

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 and KLM fly from State of Washington to Southampton in about 19h 05m. The time it takes to get you to your destination can typically vary by up to 2h 40m. 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.

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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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.

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