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Cheap flights from Washington, D.C. Dulles Intl Airport to Southampton from £303

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOU
20 Jul — 27 Jul1
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 20 June 2026.

Sun 2/817:15
IAD
-
SOU
1 stop10h 25m
Aer Lingus
Sun 9/809:20
SOU
-
IAD
1 stop11h 25m
Aer Lingus
Deal found 18/6£767
Sun 2/820:30
IAD
-
SOU
2 stops19h 15m
Multiple Airlines
Sun 9/809:20
SOU
-
IAD
1 stop11h 25m
Multiple Airlines
Deal found 18/6£802
Tue 15/917:40
IAD
-
SOU
1 stop10h 05m
Delta
Mon 21/917:20
SOU
-
IAD
1 stop27h 15m
Delta
Deal found 17/6£835
Wed 16/911:00
IAD
-
SOU
2 stops16h 35m
Delta
Tue 22/909:05
SOU
-
IAD
1 stop11h 30m
Delta
Deal found 17/6£839
Tue 21/720:30
IAD
-
SOU
2 stops18h 00m
Multiple Airlines
Wed 29/714:20
SOU
-
IAD
3 stops25h 05m
Multiple Airlines
Deal found 19/6£840
Tue 15/917:40
IAD
-
SOU
1 stop10h 05m
Delta
Tue 22/917:20
SOU
-
IAD
2 stops28h 01m
Delta
Deal found 17/6£843
Mon 24/818:10
IAD
-
SOU
1 stop18h 25m
KLM
Mon 7/917:20
SOU
-
IAD
1 stop27h 15m
KLM
Deal found 15/6£844

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 20 June 2026.

Round-trip from

£767

One-way from

£303

Popular in

June

Cheapest in

February

Average price

£916
Aer Lingus
  • Aer Lingus
  • 2/8-9/8
  • 2 total stops
  • 21h 50m total
  • Washington, D.C. to Southampton
Search Deals
12/8
  • 12/8
  • 2 total stops
  • 57h 05m total
  • Washington, D.C. 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. 5% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

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 20 June 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

£844
Fastest return journey

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 14/9

18:10-08:35

1 stop9h 25m

Southampton Eastleigh

Thu 24/9

09:05-15:35

1 stop11h 30m

£845

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sun 6/9

11:10-08:35

2 stops16h 25m

Southampton Eastleigh

Tue 15/9

09:05-23:23

2 stops19h 18m

£855

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 24/8

10:16-08:45

2 stops17h 29m

Southampton Eastleigh

Mon 14/9

09:05-15:35

1 stop11h 30m

£887
Cheapest one-way

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 12/8

11:25-19:30

3 stops27h 05m

£328

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 5/9

17:15-08:35

1 stop10h 20m

£409
Fastest single journey

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 1/8

17:40-08:45

1 stop10h 05m

£443

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 5/9

12:30-08:45

2 stops15h 15m

£446

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 5/9

12:30-08:45

2 stops15h 15m

£446

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 30/7

12:37-08:45

2 stops15h 08m

£446

Flights are sorted by cheapest return flights first.

Deals found on 18/6

Sorted by cheapest first

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 9h 25m. Airlines will cover a distance of 3639 mi. Both multi-stop and direct flights can be found to your destination and back.

  • 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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