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Cheap flights from Washington, D.C. Dulles Intl Airport to Southampton from £300

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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOU
8 Jun — 15 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Dulles Intl to Southampton

Enter your travel dates to find the best prices.

Cheapest flights from Dulles Intl to Southampton
Explore the most affordable flight options available from Dulles Intl to Southampton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 May 2026.

Mon 17/817:15
IAD
-
SOU
1 stop10h 25m
Multiple Airlines
Tue 1/918:10
SOU
-
IAD
2 stops30h 15m
Multiple Airlines
Deal found 7/5£749
Mon 24/818:10
IAD
-
SOU
1 stop9h 35m
KLM
Mon 7/917:20
SOU
-
IAD
1 stop27h 15m
KLM
Deal found 7/5£810
Mon 17/808:28
IAD
-
SOU
2 stops19h 17m
Virgin Atlantic
Tue 1/909:05
SOU
-
IAD
2 stops18h 54m
Virgin Atlantic
Deal found 7/5£820
Thu 27/817:40
IAD
-
SOU
1 stop18h 55m
Delta
Mon 31/817:20
SOU
-
IAD
1 stop27h 15m
Delta
Deal found 4/5£847
Wed 26/818:10
IAD
-
SOU
1 stop9h 35m
Delta
Mon 31/817:20
SOU
-
IAD
1 stop27h 15m
Delta
Deal found 4/5£854
Mon 24/812:29
IAD
-
SOU
2 stops15h 16m
Delta
Mon 7/909:05
SOU
-
IAD
2 stops17h 13m
Delta
Deal found 4/5£857
Fri 5/609:55
IAD
-
SOU
3 stops28h 35m
Multiple Airlines
Sat 13/609:20
SOU
-
IAD
2 stops17h 06m
Multiple Airlines
Deal found 8/5£862

Find flight deals from Dulles Intl to Southampton

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Southampton (SOU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 9 May 2026.

Round-trip from

£749

One-way from

£300

Popular in

June

Cheapest in

January

Average price

£647
17/8-1/9
  • 17/8-1/9
  • 3 total stops
  • 40h 40m total
  • Washington, D.C. to Southampton
Search Deals
5/9
  • 5/9
  • 3 total stops
  • 34h 20m total
  • Washington, D.C. to Southampton
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£87 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
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Cheapflights Fare Finder

 
Customise your flight search to find flights from Dulles Intl 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 9 May 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 24/8

18:10-17:35

1 stop18h 25m

Southampton Eastleigh

Mon 7/9

17:20-15:35

1 stop27h 15m

£810

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 29/8

17:40-08:45

1 stop10h 05m

Southampton Eastleigh

Mon 7/9

17:20-15:35

1 stop27h 15m

£878

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 26/8

18:10-08:45

1 stop9h 35m

Southampton Eastleigh

Sun 30/8

17:30-15:35

1 stop27h 05m

£891

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 20/5

18:10-08:35

1 stop9h 25m

Southampton Eastleigh

Mon 25/5

17:20-15:35

1 stop27h 15m

£956
Fastest return journey

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 29/8

11:06-08:45

2 stops16h 39m

Southampton Eastleigh

Mon 7/9

09:05-21:18

2 stops17h 13m

£970
Cheapest one-way

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 5/9

20:30-20:45

2 stops19h 15m

£331

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 5/9

17:40-16:50

1 stop18h 10m

£372

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Fri 15/5

17:40-16:50

1 stop18h 10m

£479
Fastest single journey

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 14/5

17:40-08:35

1 stop9h 55m

£479

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 11/6

20:45-19:30

1 stop17h 45m

£480

Flights are sorted by cheapest return flights first.

Deals found on 6/5

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

Best time to book a flight from Dulles Intl to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton from Dulles Intl 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.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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, D.C. Dulles Intl?

    Most people fly into Southampton Eastleigh (SOU) if they book a flight to Southampton from Washington, D.C. Dulles Intl. On average, Eastleigh has 0 inbound flights from Washington, D.C. Dulles Intl per day from 0 airlines. Southampton Eastleigh is conveniently located just 3.5 mi from Southampton’s city center.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Southampton?

    Departing from Washington, D.C. Dulles Intl Airport to Southampton will take you 18h 25m. Airlines will cover a distance of 3639 mi.

  • Can I find deals for flights from Dulles Intl to Southampton that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Southampton flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Southampton?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Southampton.

  • Can I find deals for business class flights from Dulles Intl to Southampton?

    Yes. Cheapflights offers flight deals from Dulles Intl 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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How does Cheapflights help users find flights from Dulles Intl to Southampton?

Cheapflights makes it easy to find Dulles Intl to Southampton flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

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 Southampton from Dulles Intl.

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

Certainly. Search results for flights to Southampton from Dulles Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

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

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