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$612+ 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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOU
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
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 January 26, 2026.

This KLM deal was found by Cheapflights users on 1/24. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/107:05 pm
IAD
-
SOU
1 stop17h 55m
KLM
Tue 3/178:50 am
SOU
-
IAD
1 stop12h 15m
KLM
Deal found 1/24$773
This Delta deal was found by Cheapflights users on 1/25. 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.
Mon 3/91:19 pm
IAD
-
SOU
2 stops15h 01m
Delta
Mon 3/235:40 pm
SOU
-
IAD
1 stop27h 25m
Delta
Deal found 1/25$777
This Delta deal was found by Cheapflights users on 1/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:10 pm
IAD
-
SOU
1 stop9h 35m
Delta
Mon 9/79:05 am
SOU
-
IAD
1 stop11h 30m
Delta
Deal found 1/24$787
This KLM deal was found by Cheapflights users on 1/25. 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.
Sat 8/295:40 pm
IAD
-
SOU
1 stop10h 05m
KLM
Mon 9/75:20 pm
SOU
-
IAD
1 stop27h 15m
KLM
Deal found 1/25$885
This Ovago deal was found by Cheapflights users on 1/25. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/245:35 pm
IAD
-
SOU
1 stop18h 25m
Scandinavian Airlines
Fri 12/45:30 pm
SOU
-
IAD
1 stop27h 15m
Scandinavian Airlines
Deal found 1/25$887
This Delta deal was found by Cheapflights users on 1/25. 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.
Mon 3/97:05 pm
IAD
-
SOU
1 stop17h 55m
Delta
Fri 3/275:35 pm
SOU
-
IAD
1 stop27h 30m
Delta
Deal found 1/25$940
This Mytrip deal was found by Cheapflights users on 1/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/109:55 am
IAD
-
SOU
3 stops27h 35m
Multiple Airlines
Tue 3/1712:00 pm
SOU
-
IAD
2 stops32h 50m
Multiple Airlines
Deal found 1/24$942
This Delta deal was found by Cheapflights users on 1/25. 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.
Fri 3/137:05 pm
IAD
-
SOU
1 stop9h 45m
Delta
Tue 3/248:50 am
SOU
-
IAD
1 stop12h 15m
Delta
Deal found 1/25$988
This Delta deal was found by Cheapflights users on 1/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/185:40 pm
IAD
-
SOU
1 stop10h 05m
Delta
Fri 7/319:15 am
SOU
-
IAD
1 stop11h 20m
Delta
Deal found 1/24$1,002
This Delta deal was found by Cheapflights users on 1/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:50 pm
IAD
-
SOU
2 stops16h 45m
Delta
Mon 8/36:05 pm
SOU
-
IAD
1 stop26h 30m
Delta
Deal found 1/24$1,007
This Delta deal was found by Cheapflights users on 1/25. 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.
Sat 8/295:40 pm
IAD
-
SOU
1 stop10h 05m
Delta
Mon 9/79:05 am
SOU
-
IAD
2 stops15h 11m
Delta
Deal found 1/25$1,009

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 January 26, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
2 stars

Round-trip from

$773
(Delta)

One-way from

$612
(KAYAK)

Popular in

June

Cheapest in

September

Average price

$643
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. 11% potential increase in price ($95 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 26, 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

Dulles Intl

Fly to

Southampton

Route

Depart

Return

Price

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 3/10

12:14 pm-8:20 am

2 stops16h 06m

Southampton Eastleigh

Tue 3/17

5:35 pm-5:05 pm

1 stop27h 30m

$777

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 3/10

9:55 am-5:30 pm

3 stops27h 35m

Southampton Eastleigh

Tue 3/17

12:00 pm-4:50 pm

2 stops32h 50m

$942

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 4/1

5:15 pm-4:35 pm

1 stop18h 20m

Southampton Eastleigh

Fri 4/10

9:10 am-3:45 pm

1 stop11h 35m

$979

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 4/1

5:15 pm-4:35 pm

1 stop18h 20m

Southampton Eastleigh

Mon 4/6

8:00 pm-3:45 pm

1 stop24h 45m

$1,117

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 2/18

5:05 pm-3:35 pm

1 stop17h 30m

Southampton Eastleigh

Thu 2/26

4:05 pm-3:35 pm

1 stop28h 30m

$1,127

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sun 2/22

5:05 pm-8:45 am

1 stop10h 40m

Southampton Eastleigh

Thu 2/26

4:05 pm-3:35 pm

1 stop28h 30m

$1,206

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 3/26

10:00 pm-3:35 pm

1 stop13h 35m

Southampton Eastleigh

Tue 4/7

8:00 pm-3:45 pm

1 stop24h 45m

$1,413

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 3/26

10:00 pm-3:35 pm

1 stop13h 35m

Southampton Eastleigh

Mon 4/6

8:00 pm-3:45 pm

1 stop24h 45m

$1,500

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Fri 1/30

5:05 pm-8:45 am

1 stop10h 40m

Southampton Eastleigh

Tue 2/3

4:30 pm-3:35 pm

2 stops28h 05m

$4,060

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Thu 4/16

8:40 pm-8:40 am

1 stop31h 00m

$612

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/22

  • 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.

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, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Southampton (average of $336). Flying from Washington, D.C. Dulles Intl Airport to Southampton in June is currently the most expensive (average of $736). 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.

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 January 26, 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
7.2
Good
1,442 reviews

Food

6.6

Boarding

7.4

Crew

8.0

Entertainment

6.9

Overall

7.2

Comfort

7.1

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
7.2
Good
1,442 reviews
Aer Lingus
7.2
Good
1,442 reviews

Food

6.6

Boarding

7.4

Crew

8.0

Entertainment

6.9

Overall

7.2

Comfort

7.1

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 06m. KLM provides one of the quickest options available for as low as $777. 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.

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

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Southampton (average of $336). Flying from Washington, D.C. Dulles Intl Airport to Southampton in June is currently the most expensive (average of $736). 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

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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
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Reagan-National to Newcastle upon Tyne flights
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Dulles Intl to Liverpool flights
Baltimore to Leeds flights
Reagan-National to Birmingham flights
Baltimore to Birmingham flights
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Baltimore to Bristol flights
Reagan-National to Bristol flights
Baltimore to Newquay flights
Reagan-National to Leeds flights
Baltimore to Exeter flights
Dulles Intl to East Midlands flights
Dulles Intl to Exeter flights
Baltimore to East Midlands flights
Reagan-National to Southampton flights
Baltimore to Doncaster flights
Dulles Intl to Doncaster flights
Reagan-National to East Midlands flights

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 January 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$789Average$1,079FlexibilityNo cancel feeOn-timeN/A

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