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$377+ 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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOU
Jul 7 — Jul 141
Tue 7/7
Tue 7/14
1 adult, Economy
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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 June 7, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/4. 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 8/48:25 pm
IAD
-
SOU
2 stops31h 20m
Multiple Airlines
Thu 8/209:20 am
SOU
-
IAD
1 stop11h 25m
Multiple Airlines
Deal found 6/4$930
This Kiwi.com deal was found by Cheapflights users on 6/2. 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.
Wed 7/158:30 pm
IAD
-
SOU
2 stops18h 00m
Multiple Airlines
Wed 7/229:20 am
SOU
-
IAD
1 stop11h 25m
Multiple Airlines
Deal found 6/2$996
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 8/45:15 pm
IAD
-
SOU
1 stop9h 50m
Aer Lingus
Thu 8/209:20 am
SOU
-
IAD
1 stop11h 25m
Aer Lingus
Deal found 6/4$1,017
This Mytrip deal was found by Cheapflights users on 6/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/269:45 am
IAD
-
SOU
3 stops18h 40m
Multiple Airlines
Sun 10/48:25 am
SOU
-
IAD
2 stops15h 35m
Multiple Airlines
Deal found 6/2$1,033
This Kiwi.com deal was found by Cheapflights users on 6/2. 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.
Wed 7/158:55 pm
IAD
-
SOU
1 stop17h 35m
Aer Lingus
Wed 7/229:20 am
SOU
-
IAD
1 stop11h 25m
Aer Lingus
Deal found 6/2$1,043
This Mytrip deal was found by Cheapflights users on 6/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/188:30 pm
IAD
-
SOU
2 stops18h 00m
Multiple Airlines
Fri 7/249:20 am
SOU
-
IAD
2 stops17h 55m
Multiple Airlines
Deal found 6/6$1,089
This Expedia deal was found by Cheapflights users on 6/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/268:40 pm
IAD
-
SOU
1 stop15h 10m
Aer Lingus
Sun 10/49:20 am
SOU
-
IAD
1 stop11h 25m
Aer Lingus
Deal found 6/2$1,094

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 June 7, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$930
(Kiwi.com)

One-way from

$377
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,121
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.
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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. 18% potential increase in price ($179 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in June 2026
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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 June 7, 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

Sat 7/18

8:30 pm-7:30 pm

2 stops18h 00m

Southampton Eastleigh

Fri 7/24

9:20 am-10:15 pm

2 stops17h 55m

$1,089

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 8/24

6:10 pm-5:35 pm

1 stop18h 25m

Southampton Eastleigh

Mon 9/7

5:20 pm-3:35 pm

1 stop27h 15m

$1,117
Quickest round-trip

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 8/24

12:29 pm-8:45 am

2 stops15h 16m

Southampton Eastleigh

Mon 9/7

9:05 am-11:20 pm

2 stops19h 15m

$1,182

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 8/29

5:40 pm-8:45 am

1 stop10h 05m

Southampton Eastleigh

Mon 9/7

5:20 pm-3:35 pm

1 stop27h 15m

$1,212

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 8/29

11:06 am-8:45 am

2 stops16h 39m

Southampton Eastleigh

Mon 9/7

9:05 am-11:21 pm

2 stops19h 16m

$1,277
Cheapest one-way

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 7/30

8:30 pm-7:20 am

2 stops29h 50m

$394

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 11/3

7:40 pm-12:55 pm

2 stops12h 15m

$432

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 11/3

9:00 pm-8:40 am

1 stop30h 40m

$443
Quickest one-way

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 9/5

5:40 pm-8:45 am

1 stop10h 05m

$508

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 9/5

11:06 am-8:45 am

2 stops16h 39m

$512

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/2

Sorted by cheapest first

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 June.
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 June 7, 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
1,600 reviews

Entertainment

7.0

Boarding

7.4

Food

6.7

Crew

8.1

Overall

7.3

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

SFO - DUB

The boarding went smoothly, the crew were great and helped me with an extra pillow, the food was good including complementary wine with dinner (economy seating), and I was able to sleep. The flight arrived early which helped with connections. Overall a great experience.
Aer Lingus
7.3
Good
1,600 reviews
Aer Lingus
7.3
Good
1,600 reviews

Entertainment

7.0

Boarding

7.4

Food

6.7

Crew

8.1

Overall

7.3

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

SFO - DUB

The boarding went smoothly, the crew were great and helped me with an extra pillow, the food was good including complementary wine with dinner (economy seating), and I was able to sleep. The flight arrived early which helped with connections. Overall a great experience.

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 18h 25m. KLM provides one of the quickest options available for as low as $1,117. Washington, D.C. Dulles Intl Airport and Southampton are separated by a distance of 3639 mi.

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

    Currently priced at $789, 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

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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 June 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$789Average$1,079FlexibilityNo cancel feeOn-timeN/A

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