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Cheap flights from Washington to Southampton from £412

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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOU
3 5月 — 10 5月1
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 3 4月 2026.

月 14/911:10
SEA
-
SOU
2 stops37h 25m
Delta
日 20/917:20
SOU
-
SEA
1 stop31h 15m
Delta
Deal found 1/4£827
月 18/513:45
SEA
-
SOU
1 stop19h 05m
KLM
月 25/509:05
SOU
-
SEA
1 stop34h 37m
KLM
Deal found 3/4£849
土 12/917:40
SEA
-
SOU
1 stop30h 55m
Delta
日 20/917:20
SOU
-
SEA
1 stop31h 15m
Delta
Deal found 1/4£852
日 13/907:20
SEA
-
SOU
2 stops17h 15m
Delta
日 20/917:20
SOU
-
SEA
1 stop31h 15m
Delta
Deal found 1/4£875
木 14/517:40
SEA
-
SOU
1 stop15h 10m
KLM
木 21/509:05
SOU
-
SEA
1 stop15h 25m
KLM
Deal found 1/4£881
日 5/717:40
SEA
-
SOU
1 stop15h 55m
Delta
火 7/718:05
SOU
-
SEA
2 stops36h 28m
Delta
Deal found 31/3£883

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 3 4月 2026.

Round-trip from

£827

One-way from

£412

Popular in

June

Cheapest in

January

Average price

£533
Delta
  • Delta
  • 14/9-20/9
  • 3 total stops
  • 68h 40m total
  • Washington to Southampton
Search Deals
3/9
  • 3/9
  • 2 total stops
  • 19h 49m total
  • Washington to Southampton
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£75 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 April 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 3 4月 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

月 18/5

13:45-16:50

1 stop19h 05m

Southampton Eastleigh

月 25/5

09:05-11:42

1 stop34h 37m

£849
Fastest return journey

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

木 14/5

05:30-08:35

2 stops19h 05m

Southampton Eastleigh

木 21/5

09:05-16:30

1 stop15h 25m

£884

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

木 14/5

17:40-08:45

1 stop31h 05m

Southampton Eastleigh

木 21/5

09:05-11:42

1 stop34h 37m

£884

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

土 4/7

06:00-08:45

2 stops18h 45m

Southampton Eastleigh

月 6/7

18:05-11:33

1 stop25h 28m

£925

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

金 3/7

23:59-08:45

2 stops24h 46m

Southampton Eastleigh

火 7/7

18:05-22:33

2 stops36h 28m

£932

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

月 18/5

17:40-16:50

1 stop15h 10m

Southampton Eastleigh

月 25/5

09:05-23:44

2 stops22h 39m

£933

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

月 14/9

17:40-08:35

1 stop30h 55m

Southampton Eastleigh

土 19/9

17:20-16:35

1 stop31h 15m

£977

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

月 18/5

13:19-19:30

2 stops22h 11m

Southampton Eastleigh

月 25/5

20:00-00:16

2 stops36h 16m

£1,011

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

火 16/6

07:20-16:50

2 stops25h 30m

Southampton Eastleigh

水 1/7

17:20-11:33

1 stop26h 13m

£1,090

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

金 22/5

19:10-16:50

1 stop13h 40m

Southampton Eastleigh

月 25/5

20:00-17:10

1 stop29h 10m

£1,162

Flights are sorted by cheapest return flights first.

Deals found on 30/3

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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, February is the cheapest month in which you can book a flight from State of Washington to Southampton (average of £373). Flying from State of Washington to Southampton in June is currently the most expensive (average of £573). 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 and Delta 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 . 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, February is the cheapest month in which you can book a flight from State of Washington to Southampton (average of £373). Flying from State of Washington to Southampton in June is currently the most expensive (average of £573). 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

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