Find flights
When to book
FAQs

Cheap flights from Washington, D.C. Dulles Intl Airport to Southampton from £362

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 26/9. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOU
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheap 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 17 September 2025.

Round-trip from

£583

One-way from

£362

Popular in

June

Cheapest in

September

Average price

£466
KLM
  • KLM
  • 1/10-5/10
  • 2 total stops
  • 44h 45m total
  • Washington, D.C. to Southampton
Search Deals
KLM
  • KLM
  • 26/9
  • 1 total stop
  • 19h 05m total
  • Washington, D.C. to Southampton
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£53 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Dulles Intl to Southampton

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 17 September 2025.

Wed 1/1017:25IAD - SOU
1 stop18h 35mKLM
Sun 5/1018:25SOU - IAD
1 stop26h 10mKLM
Deal found 15/9£583
Sun 28/917:25IAD - SOU
1 stop10h 20mDelta
Tue 14/1009:20SOU - IAD
1 stop11h 15mDelta
Deal found 15/9£595
Wed 1/1010:07IAD - SOU
2 stops17h 38mDelta
Sun 5/1018:25SOU - IAD
1 stop26h 10mDelta
Deal found 15/9£597
Sun 28/917:00IAD - SOU
2 stops34h 45mDelta
Mon 13/1017:35SOU - IAD
1 stop27h 00mDelta
Deal found 15/9£598
Thu 2/1017:25IAD - SOU
1 stop10h 20mDelta
Wed 15/1017:35SOU - IAD
2 stops27h 54mDelta
Deal found 15/9£603
Sun 28/917:25IAD - SOU
1 stop10h 20mDelta
Sun 12/1018:25SOU - IAD
1 stop26h 10mDelta
Deal found 15/9£650
Wed 1/1023:15IAD - SOU
2 stops15h 15mMultiple Airlines
Sun 5/1018:25SOU - IAD
3 stops29h 55mMultiple Airlines
Deal found 15/9£660
Sun 28/917:25IAD - SOU
1 stop10h 20mDelta
Fri 17/1017:35SOU - IAD
1 stop27h 00mDelta
Deal found 15/9£687
Sat 8/1117:05IAD - SOU
1 stop10h 40mAer Lingus
Sat 15/1109:30SOU - IAD
1 stop15h 00mAer Lingus
Deal found 15/9£716
Sat 8/1117:05IAD - SOU
1 stop10h 40mBritish Airways
Sat 15/1115:45SOU - IAD
2 stops33h 10mBritish Airways
Deal found 15/9£1,033

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 17 September 2025.
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

Dulles Intl

Fly to

Southampton

Route

Depart

Return

Price

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Fri 3/10

17:25-08:45

1 stop10h 20m

Southampton Eastleigh

Thu 16/10

09:20-15:35

1 stop11h 15m

£595

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sun 28/9

17:25-08:45

1 stop10h 20m

Southampton Eastleigh

Mon 13/10

17:35-15:35

1 stop27h 00m

£595

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 1/10

17:25-08:45

1 stop10h 20m

Southampton Eastleigh

Tue 14/10

17:35-15:35

1 stop27h 00m

£595

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Fri 3/10

17:25-17:30

1 stop19h 05m

Southampton Eastleigh

Tue 14/10

09:20-15:35

1 stop11h 15m

£595

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 30/9

17:25-08:45

1 stop10h 20m

Southampton Eastleigh

Thu 16/10

09:20-15:35

1 stop11h 15m

£595

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 29/9

17:25-08:45

1 stop10h 20m

Southampton Eastleigh

Tue 14/10

17:35-15:35

1 stop27h 00m

£595

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sun 28/9

17:25-08:45

1 stop10h 20m

Southampton Eastleigh

Wed 15/10

17:35-15:35

1 stop27h 00m

£595

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 2/10

17:25-08:45

1 stop10h 20m

Southampton Eastleigh

Thu 16/10

09:20-15:35

1 stop11h 15m

£595

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 1/10

10:07-08:45

2 stops17h 38m

Southampton Eastleigh

Sun 5/10

18:25-15:35

1 stop26h 10m

£597

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 1/10

10:07-08:45

2 stops17h 38m

Southampton Eastleigh

Thu 16/10

09:20-15:35

1 stop11h 15m

£598

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 15 results
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.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Southampton

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Southampton?

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Southampton (average of £203). Flying from Washington, D.C. Dulles Intl Airport to Southampton in November is currently the most expensive (average of £262). 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 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 10h 20m. 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.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Southampton?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Southampton (average of £203). Flying from Washington, D.C. Dulles Intl Airport to Southampton in November is currently the most expensive (average of £262). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to Southampton

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Heathrow flights
Baltimore to Heathrow flights
Dulles Intl to Gatwick flights
Reagan-National to Heathrow flights
Dulles Intl to London City flights
Baltimore to Gatwick flights
Reagan-National to Gatwick flights
Dulles Intl to Luton flights
Baltimore to London City flights
Baltimore to Luton flights
Dulles Intl to Edinburgh flights
Baltimore to Stansted flights
Baltimore to Edinburgh flights
Reagan-National to Edinburgh flights
Dulles Intl to Manchester flights
Baltimore to Manchester flights
Reagan-National to Stansted flights
Reagan-National to Manchester flights
Dulles Intl to Bristol flights
Reagan-National to Luton flights
Dulles Intl to Birmingham flights
Baltimore to Birmingham flights
Baltimore to Newcastle upon Tyne flights
Dulles Intl to Newcastle upon Tyne flights
Dulles Intl to Liverpool flights
Dulles Intl to Leeds flights
Baltimore to Leeds flights
Reagan-National to Bristol flights
Baltimore to Bristol flights
Baltimore to East Midlands flights
Dulles Intl to Exeter flights
Dulles Intl to East Midlands flights
Baltimore to Southampton flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.