HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Southampton

$240+ Cheap flights from Dulles Intl (IAD) to Southampton (SOU)

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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOU
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Southampton with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 July 25, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:05 pm
IAD
-
SOU
2 stops13h 40m
Multiple Airlines
Fri 10/309:20 am
SOU
-
IAD
1 stop11h 15m
Multiple Airlines
Deal found 7/23$886
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:30 pm
IAD
-
SOU
2 stops32h 45m
Multiple Airlines
Mon 9/149:20 am
SOU
-
IAD
1 stop11h 25m
Multiple Airlines
Deal found 7/24$911
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/108:30 pm
IAD
-
SOU
2 stops34h 55m
Multiple Airlines
Sun 10/189:20 am
SOU
-
IAD
1 stop11h 25m
Multiple Airlines
Deal found 7/21$918
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:40 pm
IAD
-
SOU
2 stops32h 00m
Multiple Airlines
Tue 12/19:20 am
SOU
-
IAD
1 stop11h 15m
Multiple Airlines
Deal found 7/21$944
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:05 pm
IAD
-
SOU
1 stop10h 35m
Aer Lingus
Fri 10/309:20 am
SOU
-
IAD
1 stop11h 15m
Aer Lingus
Deal found 7/23$957
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:05 pm
IAD
-
SOU
1 stop21h 25m
Aer Lingus
Tue 12/19:20 am
SOU
-
IAD
1 stop11h 15m
Aer Lingus
Deal found 7/21$961
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/65:15 pm
IAD
-
SOU
2 stops14h 10m
Multiple Airlines
Sun 9/139:20 am
SOU
-
IAD
1 stop11h 25m
Multiple Airlines
Deal found 7/23$994
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/65:15 pm
IAD
-
SOU
1 stop10h 25m
Aer Lingus
Sun 9/139:20 am
SOU
-
IAD
1 stop11h 25m
Aer Lingus
Deal found 7/23$1,017
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/108:40 pm
IAD
-
SOU
1 stop31h 00m
Aer Lingus
Sun 10/189:20 am
SOU
-
IAD
1 stop11h 25m
Aer Lingus
Deal found 7/21$1,024

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 July 25, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$886
(Kiwi.com)

One-way from

$240
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$972
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Southampton Eastleigh flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Southampton Eastleigh flights.
Search Deals
From Washington, D.C. Dulles Intl to Southampton Eastleigh
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Southampton Eastleigh
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($228 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated July 25, 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 round-trip

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sun 9/6

5:40 pm-4:50 pm

1 stop18h 10m

Southampton Eastleigh

Tue 9/15

9:05 am-3:35 pm

1 stop11h 30m

$1,159

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sun 9/6

11:06 am-8:35 am

2 stops16h 29m

Southampton Eastleigh

Tue 9/15

9:05 am-3:35 pm

1 stop11h 30m

$1,164
Quickest round-trip

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sun 10/11

5:40 pm-8:35 am

1 stop9h 55m

Southampton Eastleigh

Sun 10/25

9:30 am-4:45 pm

1 stop11h 15m

$1,165

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sun 8/23

5:40 pm-5:35 pm

1 stop18h 55m

Southampton Eastleigh

Fri 9/4

9:05 am-3:35 pm

1 stop11h 30m

$1,206

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 8/4

5:40 pm-8:45 am

1 stop10h 05m

Southampton Eastleigh

Tue 8/18

6:05 pm-3:35 pm

1 stop26h 30m

$1,224

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 8/5

6:10 pm-5:35 pm

1 stop18h 25m

Southampton Eastleigh

Mon 8/17

6:05 pm-3:35 pm

1 stop26h 30m

$1,231

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 8/4

6:00 am-8:45 am

2 stops21h 45m

Southampton Eastleigh

Mon 8/17

6:05 pm-3:35 pm

1 stop26h 30m

$1,236

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 8/22

5:40 pm-8:45 am

1 stop10h 05m

Southampton Eastleigh

Sun 8/30

9:15 am-3:35 pm

1 stop11h 20m

$1,259

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sun 8/23

7:26 pm-5:35 pm

2 stops17h 09m

Southampton Eastleigh

Tue 9/8

9:05 am-3:35 pm

1 stop11h 30m

$1,260
Cheapest one-way
Quickest one-way

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 11/19

5:45 pm-8:10 am

1 stop9h 25m

$522

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Compare providers for flights from Dulles Intl to Southampton

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Southampton in July.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Southampton flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Washington, D.C. Dulles Intl Airport-Southampton flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Southampton flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Southampton flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Southampton flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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.

Reviews of airlines servicing Southampton

Get insights into the airlines that provide service to Southampton. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Southampton. Reviews last updated July 25, 2026.
See what other customers who have flown with Aer Lingus from Washington, D.C. Dulles Intl Airport to Southampton have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,679 reviews

Entertainment

7.0

Comfort

7.2

Boarding

7.4

Food

6.7

Crew

8.1

Overall

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2025

DUB - EDI

Fine except for app. Couldn’t check in online - kept saying I couldn’t check in until the morning after my flight. On second leg I could check in but couldn’t get my boarding pass into my wallet. Thankfully I took a screenshot of it because I couldn’t retrieve it when we boarded - the app prohibited it.
Aer Lingus
7.3
Good
1,679 reviews
Aer Lingus
7.3
Good
1,679 reviews

Entertainment

7.0

Comfort

7.2

Boarding

7.4

Food

6.7

Crew

8.1

Overall

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2025

DUB - EDI

Fine except for app. Couldn’t check in online - kept saying I couldn’t check in until the morning after my flight. On second leg I could check in but couldn’t get my boarding pass into my wallet. Thankfully I took a screenshot of it because I couldn’t retrieve it when we boarded - the app prohibited it.

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?

    For a flight from Washington, D.C. Dulles Intl to Southampton, you will be flying into Eastleigh. Southampton Eastleigh (SOU) is just 3.5 mi from the center of the city. Eastleigh is the only Southampton airport and it handles 0 inbound flights from Washington, D.C. Dulles Intl per day. 1 airline has flights to Southampton Eastleigh from Washington, D.C. Dulles Intl on a regular basis.

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

    A quick flight from Washington, D.C. Dulles Intl Airport to Southampton can take about 16h 29m. KLM provides one of the quickest options available for as low as $1,164. Washington, D.C. Dulles Intl Airport and Southampton are separated by a distance of 3639 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to Southampton round-trip?

    Currently priced at $812, Aer Lingus will fly you from Washington, D.C. Dulles Intl Airport to Southampton and back. In addition to Aer Lingus, many other airlines offer competitively priced options for your trip.

  • 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 vacation 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

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.

Top airline flying from Dulles Intl to Southampton

Discover the top airline that operate flights from Dulles Intl to Southampton. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$812Average$1,080FlexibilityNo cancel feeOn-timeN/A

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.