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Dulles Intl

$581+ 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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — IAD
maj 28 — jun 41
tors 5/28
tors 6/4
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 april 28, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tis 6/99:20 am
SOU
-
IAD
1 stop15h 15m
Aer Lingus
tis 6/169:05 pm
IAD
-
SOU
1 stop14h 45m
Aer Lingus
Deal found 4/25$844
This Globehunters deal was found by Cheapflights users on 4/27. 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 Globehunters is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tors 10/299:20 am
SOU
-
IAD
1 stop15h 10m
Aer Lingus
tors 11/55:05 pm
IAD
-
SOU
1 stop10h 35m
Aer Lingus
Deal found 4/27$857
This Kiwi.com deal was found by Cheapflights users on 4/27. 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.
tors 6/119:20 am
SOU
-
IAD
1 stop14h 40m
Aer Lingus
tors 6/188:45 pm
IAD
-
SOU
1 stop17h 45m
Aer Lingus
Deal found 4/27$903
This ChecknFly deal was found by Cheapflights users on 4/24. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tors 10/299:20 am
SOU
-
IAD
1 stop15h 10m
Multiple Airlines
tors 11/56:20 pm
IAD
-
SOU
2 stops17h 15m
Multiple Airlines
Deal found 4/24$976
This Mytrip deal was found by Cheapflights users on 4/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tis 6/99:20 am
SOU
-
IAD
1 stop15h 15m
Multiple Airlines
tis 6/165:15 pm
IAD
-
SOU
2 stops34h 20m
Multiple Airlines
Deal found 4/25$1,014

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 april 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$844
(Kiwi.com)

One-way from

$581
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$712
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. 10% potential increase in price ($82 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 april 28, 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

tors 6/11

9:20 am-7:00 pm

1 stop14h 40m

Washington, D.C. Dulles Intl

tors 6/18

8:45 pm-7:30 pm

1 stop17h 45m

$903

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

tis 6/23

9:20 am-3:45 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

tis 6/30

9:05 pm-7:30 pm

1 stop17h 25m

$1,109

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

tors 9/3

9:20 am-3:45 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

mån 9/7

9:00 pm-4:50 pm

1 stop14h 50m

$1,155

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

sön 6/21

2:45 pm-3:50 pm

2 stops30h 05m

Washington, D.C. Dulles Intl

sön 6/28

5:15 pm-8:40 am

1 stop10h 25m

$1,220
Quickest round-trip

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

mån 6/22

9:20 am-3:45 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

tors 7/2

5:15 pm-8:40 am

1 stop10h 25m

$1,270

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

tors 8/20

6:45 am-8:20 pm

2 stops18h 35m

Washington, D.C. Dulles Intl

fre 9/18

10:25 pm-9:45 am

2 stops30h 20m

$1,273

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

sön 6/21

5:20 pm-3:35 pm

1 stop27h 15m

Washington, D.C. Dulles Intl

sön 6/28

5:40 pm-8:35 am

1 stop9h 55m

$1,306
Cheapest one-way

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

tis 7/14

8:00 pm-10:46 am

3 stops43h 46m

$581

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

ons 7/1

9:20 am-7:15 pm

1 stop14h 55m

$847
Quickest one-way

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

sön 5/31

9:20 am-3:45 pm

1 stop11h 25m

$1,112

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/24

Showing 1-10 of 13 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 25m. Fly via Aer Lingus or British Airways to get the fastest option. There are 3639 mi between Southampton and Washington, D.C. Dulles Intl Airport. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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
Silver Spring
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Woodbridge
Hanover
Laurel
Largo
Upper Marlboro
Waldorf
Clinton
Hunt Valley
Cordova

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