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$421+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOU
May 23 — May 301
Sat 5/23
Sat 5/30
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 April 23, 2026.

This Mytrip deal was found by Cheapflights users on 4/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:30 pm
IAD
-
SOU
2 stops16h 20m
Multiple Airlines
Wed 5/133:35 pm
SOU
-
IAD
3 stops24h 11m
Multiple Airlines
Deal found 4/23$1,009
This Mytrip deal was found by Cheapflights users on 4/18. 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.
Wed 6/38:18 am
IAD
-
SOU
3 stops30h 12m
Multiple Airlines
Wed 6/103:35 pm
SOU
-
IAD
3 stops28h 35m
Multiple Airlines
Deal found 4/18$1,026
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 6/65:15 pm
IAD
-
SOU
1 stop10h 20m
Aer Lingus
Sat 6/139:20 am
SOU
-
IAD
1 stop14h 40m
Aer Lingus
Deal found 4/22$1,069
This Mytrip deal was found by Cheapflights users on 4/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/95:15 pm
IAD
-
SOU
1 stop10h 20m
Aer Lingus
Wed 5/139:20 am
SOU
-
IAD
1 stop15h 05m
Aer Lingus
Deal found 4/23$1,109
This KLM deal was found by Cheapflights users on 4/21. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:10 pm
IAD
-
SOU
1 stop18h 25m
KLM
Mon 9/75:20 pm
SOU
-
IAD
1 stop27h 15m
KLM
Deal found 4/21$1,110
This Delta deal was found by Cheapflights users on 4/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/165:40 pm
IAD
-
SOU
1 stop10h 05m
Delta
Mon 8/246:05 pm
SOU
-
IAD
1 stop26h 30m
Delta
Deal found 4/21$1,117

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 April 23, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$1,009
(Mytrip)

One-way from

$421
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$708
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Southampton Eastleigh flight deals.
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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. 14% potential increase in price ($129 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 23, 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

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

$1,110

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 8/19

6:10 pm-8:45 am

1 stop9h 35m

Southampton Eastleigh

Mon 8/24

6:05 pm-3:35 pm

1 stop26h 30m

$1,117

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

Wed 8/12

6:05 pm-3:35 pm

1 stop26h 30m

$1,153

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 8/29

5:40 pm-5:00 pm

1 stop18h 20m

Southampton Eastleigh

Mon 9/7

5:20 pm-3:35 pm

1 stop27h 15m

$1,195

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 8/6

5:40 pm-8:45 am

1 stop10h 05m

Southampton Eastleigh

Tue 8/11

6:05 pm-3:35 pm

1 stop26h 30m

$1,203

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 6/3

6:10 pm-4:50 pm

1 stop17h 40m

Southampton Eastleigh

Wed 6/10

9:05 am-3:35 pm

1 stop11h 30m

$1,310
Quickest round-trip

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 6/3

6:10 pm-8:35 am

1 stop9h 25m

Southampton Eastleigh

Wed 6/10

9:05 am-3:35 pm

1 stop11h 30m

$1,310

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 6/3

1:32 pm-8:35 am

2 stops14h 03m

Southampton Eastleigh

Wed 6/10

9:05 am-3:35 pm

1 stop11h 30m

$1,314
Cheapest one-way

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sun 9/6

8:30 pm-4:50 pm

3 stops39h 20m

$437

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sun 9/6

5:15 pm-8:40 am

1 stop10h 25m

$448

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 17 resultsSorted by cheapest first
1
2
  • 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 90-95% 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 April 23, 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
1,521 reviews

Comfort

7.2

Entertainment

7.0

Crew

8.1

Boarding

7.4

Overall

7.3

Food

6.6

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
1,521 reviews
Aer Lingus
7.3
Good
1,521 reviews

Comfort

7.2

Entertainment

7.0

Crew

8.1

Boarding

7.4

Overall

7.3

Food

6.6

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 9h 35m. 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. 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 $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

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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 April 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$789Average$1,079FlexibilityNo cancel feeOn-timeN/A

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