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Dulles Intl

$514+ Cheap flights from Southampton (SOU) to Dulles Intl (IAD)

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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — IAD
Jun 17 — Jun 241
Wed 6/17
Wed 6/24
1 adult, Economy
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Cheap flight deals from Southampton to Dulles Intl

Cheapest flights from Southampton to Dulles Intl
Explore the most affordable flight options available from Southampton to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 18, 2026.

This ChecknFly deal was found by Cheapflights users on 5/14. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:20 am
SOU
-
IAD
1 stop15h 10m
Aer Lingus
Thu 11/59:00 pm
IAD
-
SOU
1 stop17h 30m
Aer Lingus
Deal found 5/14$830
This ChecknFly deal was found by Cheapflights users on 5/14. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:20 am
SOU
-
IAD
1 stop15h 10m
Multiple Airlines
Thu 11/59:00 pm
IAD
-
SOU
2 stops15h 40m
Multiple Airlines
Deal found 5/14$865
This Trip.com deal was found by Cheapflights users on 5/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/39:20 am
SOU
-
IAD
2 stops15h 00m
Multiple Airlines
Thu 9/178:30 pm
IAD
-
SOU
2 stops18h 00m
Multiple Airlines
Deal found 5/16$938
This Mytrip deal was found by Cheapflights users on 5/18. 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.
Tue 6/96:10 pm
SOU
-
IAD
3 stops31h 19m
Multiple Airlines
Mon 6/158:18 am
IAD
-
SOU
3 stops27h 32m
Multiple Airlines
Deal found 5/18$969
This TravelUp deal was found by Cheapflights users on 5/16. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:20 pm
SOU
-
IAD
1 stop27h 15m
KLM
Thu 9/1712:30 pm
IAD
-
SOU
2 stops15h 05m
KLM
Deal found 5/16$1,063
This KLM deal was found by Cheapflights users on 5/17. 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.
Thu 10/295:30 pm
SOU
-
IAD
1 stop27h 25m
KLM
Thu 11/512:30 pm
IAD
-
SOU
2 stops14h 40m
KLM
Deal found 5/17$1,090

Find flight deals from Southampton to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Southampton (SOU) to Dulles Intl (IAD). 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 May 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$830
(ChecknFly)

One-way from

$514
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$742
Provider with most accurate pricing for Southampton Eastleigh-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Southampton Eastleigh-Washington, D.C. Dulles Intl flights.
Search Deals
From Southampton Eastleigh to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Southampton Eastleigh to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($76 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Southampton to Dulles Intl 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 May 18, 2026.
Use the filters below to find and compare flights from Southampton to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 10/29

9:20 am-8:30 pm

1 stop15h 10m

Washington, D.C. Dulles Intl

Thu 11/5

9:00 pm-5:40 pm

2 stops15h 40m

$865

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Tue 6/9

6:10 pm-8:29 pm

3 stops31h 19m

Washington, D.C. Dulles Intl

Mon 6/15

8:18 am-4:50 pm

3 stops27h 32m

$969

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 9/3

3:15 pm-3:35 pm

1 stop29h 20m

Washington, D.C. Dulles Intl

Thu 9/17

10:25 pm-9:45 am

1 stop30h 20m

$1,009

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 10/29

9:20 am-4:35 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 11/5

5:05 pm-4:35 pm

1 stop18h 30m

$1,059

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 10/29

5:30 pm-4:55 pm

1 stop27h 25m

Washington, D.C. Dulles Intl

Thu 11/5

12:30 pm-8:10 am

2 stops14h 40m

$1,090
Quickest round-trip

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 7/22

9:20 am-3:45 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

Tue 7/28

5:15 pm-8:05 am

1 stop9h 50m

$1,104

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 7/19

8:00 pm-3:45 pm

1 stop24h 45m

Washington, D.C. Dulles Intl

Wed 7/29

7:15 pm-2:45 pm

2 stops14h 30m

$1,131
Cheapest one-way

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 9/14

7:20 pm-7:35 pm

2 stops29h 15m

$530

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 8/23

12:35 pm-12:53 pm

3 stops53h 18m

$555
Quickest one-way

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 9/14

9:20 am-3:45 pm

1 stop11h 25m

$703

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/14

Showing 1-10 of 18 resultsSorted by cheapest first
1
2
  • Most accurate provider: When it comes to deals on Southampton-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Southampton-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Southampton-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Southampton-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub 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 Southampton-Washington, D.C. Dulles Intl Airport 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 Southampton to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Southampton 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.

Related info for your journey

Find useful and relevant information for your journey from Southampton to Dulles Intl. 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 from for flights from Southampton to Washington, D.C. Dulles Intl?

    If you book a flight to Washington, D.C. Dulles Intl from Southampton, you will be flying from Eastleigh, which is the city’s only airport. Southampton Eastleigh (SOU) is located 3.5 mi from the center of Southampton. There are 0 flights from Eastleigh to Washington, D.C. Dulles Intl per day from 0 different airlines.

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

    There are many flights that can get you from Southampton to Washington, D.C. Dulles Intl Airport in 11h 15m. Fly via Aer Lingus to get the fastest option. There are 3639 mi between Southampton and Washington, D.C. Dulles Intl Airport.

  • Can I find deals for flights from Southampton to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Southampton to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Southampton to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Southampton to Dulles Intl.

  • Can I find deals for business class flights from Southampton to Dulles Intl?

    Yes. Cheapflights offers flight deals from Southampton to Dulles Intl 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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Tysons
Owings Mills
Springfield
Arlington
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Silver Spring
Hanover
Laurel
Woodbridge
Waldorf
Largo
Clinton
Hunt Valley
Cordova
Reston

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