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Dulles Intl

$576+ 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 11/23. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — IAD
Jul 13 — Jul 201
Mon 7/13
Mon 7/20
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 June 13, 2026.

This TravelUp deal was found by Cheapflights users on 6/11. 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.
Wed 7/89:20 am
SOU
-
IAD
1 stop14h 55m
British Airways
Fri 7/245:15 pm
IAD
-
SOU
1 stop18h 35m
British Airways
Deal found 6/11$681
This British Airways deal was found by Cheapflights users on 6/9. 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 British Airways 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
British Airways
Thu 11/55:05 pm
IAD
-
SOU
1 stop10h 35m
British Airways
Deal found 6/9$682
This British Airways deal was found by Cheapflights users on 6/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/99:20 am
SOU
-
IAD
1 stop11h 25m
British Airways
Thu 8/138:40 pm
IAD
-
SOU
1 stop17h 50m
British Airways
Deal found 6/9$692
This TravelUp deal was found by Cheapflights users on 6/12. 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.
Tue 9/18:00 pm
SOU
-
IAD
1 stop28h 25m
British Airways
Fri 9/118:55 pm
IAD
-
SOU
1 stop14h 55m
British Airways
Deal found 6/12$695
This British Airways deal was found by Cheapflights users on 6/11. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/278:00 pm
SOU
-
IAD
1 stop24h 45m
British Airways
Sun 10/45:15 pm
IAD
-
SOU
1 stop10h 25m
British Airways
Deal found 6/11$699
This British Airways deal was found by Cheapflights users on 6/8. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/59:20 am
SOU
-
IAD
1 stop15h 05m
British Airways
Wed 8/125:15 pm
IAD
-
SOU
1 stop10h 25m
British Airways
Deal found 6/8$700
This KLM deal was found by Cheapflights users on 6/9. 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 11/51:00 pm
IAD
-
SOU
2 stops14h 10m
KLM
Deal found 6/9$757

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 June 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$681
(British Airways)

One-way from

$576
(British Airways)

Popular in

June

Cheapest in

February

Average price

$794
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 ($77 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 June 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 June 13, 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
Quickest round-trip

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-8:40 am

1 stop10h 35m

$681

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 7/8

9:20 am-7:15 pm

1 stop14h 55m

Washington, D.C. Dulles Intl

Fri 7/24

5:15 pm-4:50 pm

1 stop18h 35m

$681

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 7/9

9:20 am-3:45 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

Thu 8/13

8:40 pm-7:30 pm

1 stop17h 50m

$692

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 9/27

8:00 pm-3:45 pm

1 stop24h 45m

Washington, D.C. Dulles Intl

Sun 10/4

5:15 pm-8:40 am

1 stop10h 25m

$699

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Tue 7/28

9:15 am-3:45 pm

1 stop11h 30m

Washington, D.C. Dulles Intl

Fri 8/7

8:55 pm-4:50 pm

1 stop14h 55m

$700

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 10/29

8:40 am-4:45 pm

1 stop12h 05m

Washington, D.C. Dulles Intl

Thu 11/5

7:59 pm-5:00 pm

2 stops16h 01m

$759

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 10/29

8:40 am-11:02 pm

2 stops18h 22m

Washington, D.C. Dulles Intl

Thu 11/5

7:59 pm-5:00 pm

2 stops16h 01m

$762

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Tue 9/1

9:05 am-11:26 pm

2 stops19h 21m

Washington, D.C. Dulles Intl

Fri 9/11

5:40 pm-8:45 am

1 stop10h 05m

$766

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 8/28

7:30 pm-7:40 pm

2 stops29h 10m

Washington, D.C. Dulles Intl

Tue 9/1

9:05 pm-4:50 pm

1 stop14h 45m

$785
Cheapest one-way

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 11/23

9:20 am-7:30 pm

1 stop15h 10m

$576

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

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 British Airways 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
Reston
Rockville
Herndon
Fredericksburg
Laurel
Hyattsville
Manassas
Hanover
Chantilly
Lanham
Falls Church
Waldorf
Silver Spring
Largo
Clinton

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