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Cheap flights from Washington to Southampton from £293

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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOU
2 Aug — 9 Aug1
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 July 2026.

Sun 16/815:40
SEA
-
SOU
2 stops19h 50m
Multiple Airlines
Mon 24/809:20
SOU
-
SEA
2 stops34h 25m
Multiple Airlines
Deal found 2/7£632
Thu 13/819:10
SEA
-
SOU
2 stops28h 10m
Multiple Airlines
Thu 20/809:20
SOU
-
SEA
1 stop15h 50m
Multiple Airlines
Deal found 30/6£716
Sun 16/819:10
SEA
-
SOU
1 stop16h 20m
Aer Lingus
Mon 24/809:20
SOU
-
SEA
1 stop15h 50m
Aer Lingus
Deal found 2/7£722
Thu 13/819:10
SEA
-
SOU
1 stop16h 20m
Aer Lingus
Thu 20/809:20
SOU
-
SEA
1 stop15h 50m
Aer Lingus
Deal found 30/6£731
Mon 24/821:40
SEA
-
SOU
2 stops26h 45m
Multiple Airlines
Mon 31/809:20
SOU
-
SEA
1 stop15h 50m
Multiple Airlines
Deal found 30/6£740
Tue 28/708:00
SEA
-
SOU
2 stops24h 50m
Multiple Airlines
Tue 4/809:15
SOU
-
SEA
2 stops34h 40m
Multiple Airlines
Deal found 30/6£767
Sun 29/1114:35
SEA
-
SOU
1 stop18h 25m
Delta
Thu 3/1217:30
SOU
-
SEA
1 stop26h 20m
Delta
Deal found 1/7£771
Mon 30/1105:45
SEA
-
SOU
2 stops27h 15m
Delta
Thu 3/1217:30
SOU
-
SEA
1 stop26h 20m
Delta
Deal found 1/7£775
Thu 13/809:25
GEG
-
SOU
2 stops24h 10m
KLM
Thu 20/809:15
SOU
-
GEG
2 stops21h 54m
KLM
Deal found 29/6£839

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 July 2026.

Round-trip from

£632

One-way from

£293

Popular in

June

Cheapest in

January

Average price

£747
16/8-24/8
  • 16/8-24/8
  • 4 total stops
  • 54h 15m total
  • Washington to Southampton
Search Deals
12/10
  • 12/10
  • 2 total stops
  • 16h 40m total
  • Washington to Southampton
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£129 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 July 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 16/8

15:40-19:30

2 stops19h 50m

Southampton Eastleigh

Mon 24/8

09:20-11:45

2 stops34h 25m

£632

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 16/8

19:10-19:30

1 stop16h 20m

Southampton Eastleigh

Mon 24/8

09:20-17:10

1 stop15h 50m

£722

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Wed 2/12

14:35-08:10

1 stop33h 35m

Southampton Eastleigh

Tue 8/12

17:30-11:50

1 stop26h 20m

£771

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sun 16/8

17:45-08:45

1 stop31h 00m

Southampton Eastleigh

Mon 24/8

18:05-20:20

2 stops34h 15m

£796

SpokaneSouthampton

GEG - SOU

GEGSOU

Spokane

Thu 13/8

09:25-17:35

2 stops24h 10m

Southampton Eastleigh

Thu 20/8

09:15-23:09

2 stops21h 54m

£839

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Sat 26/9

23:59-08:35

2 stops24h 36m

Southampton Eastleigh

Sat 3/10

17:20-11:52

1 stop26h 32m

£857

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 24/8

06:05-08:45

2 stops18h 40m

Southampton Eastleigh

Mon 31/8

09:05-22:00

2 stops20h 55m

£865
Fastest return journey

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 28/7

17:40-17:35

1 stop15h 55m

Southampton Eastleigh

Tue 4/8

09:15-16:27

1 stop15h 12m

£878

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Tue 28/7

14:30-17:35

2 stops19h 05m

Southampton Eastleigh

Tue 4/8

09:15-11:37

1 stop34h 22m

£881
Cheapest one-way

SeattleSouthampton

SEA - SOU

SEASOU

Seattle/Tacoma Intl

Mon 12/10

19:00-08:05

3 stops29h 05m

£314

Flights are sorted by cheapest return flights first.

Deals found on 28/6

Showing 1-10 of 19 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 Aer Lingus and KLM fly from State of Washington to Southampton in about 16h 20m. The time it takes to get you to your destination can typically vary by up to 7h 50m. 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

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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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Fly with Cheapflights

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

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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.

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