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Dulles Intl

$745+ Cheap flights from Southampton (SOU) to Dulles Intl (IAD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/14. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — IAD
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Cheap 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 October 28, 2025.

Most accurate provider

OneTravel
3 stars

Most trusted provider

OneTravel
3 stars

Round-trip from

$745
(Delta)

Popular in

July

Cheapest in

February

Average price

$745
Provider with most accurate pricing for London (LON)-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for London (LON)-Washington, D.C. (WAS) flights.
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From Southampton Eastleigh to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 11% potential increase in price ($94 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 28, 2025.

This Delta deal was found by Cheapflights users on 10/26. 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 12/146:05 pmSOU - IAD
1 stop27h 00mDelta
Tue 1/1312:29 pmIAD - SOU
2 stops15h 21mDelta
Deal found 10/26$745
This Delta deal was found by Cheapflights users on 10/26. 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.
Tue 12/165:30 pmSOU - IAD
1 stop27h 35mDelta
Wed 1/145:26 pmIAD - SOU
2 stops33h 59mDelta
Deal found 10/26$748
This Delta deal was found by Cheapflights users on 10/26. 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 12/156:05 pmSOU - IAD
2 stops30h 14mDelta
Wed 1/145:26 pmIAD - SOU
2 stops33h 59mDelta
Deal found 10/26$751
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Fri 12/128:40 amSOU - IAD
2 stops15h 50mMultiple Airlines
Fri 12/195:05 pmIAD - SOU
1 stop10h 40mMultiple Airlines
Deal found 10/28$774
This Delta deal was found by Cheapflights users on 10/26. 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 12/149:30 amSOU - IAD
1 stop11h 35mDelta
Mon 1/126:05 pmIAD - SOU
1 stop9h 45mDelta
Deal found 10/26$780
This Delta deal was found by Cheapflights users on 10/26. 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.
Tue 12/168:40 amSOU - IAD
1 stop12h 25mDelta
Mon 1/126:05 pmIAD - SOU
1 stop9h 45mDelta
Deal found 10/26$782
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Fri 12/129:30 amSOU - IAD
1 stop15h 00mAer Lingus
Fri 12/195:05 pmIAD - SOU
1 stop10h 40mAer Lingus
Deal found 10/28$787
This Delta deal was found by Cheapflights users on 10/26. 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 12/149:30 amSOU - IAD
1 stop11h 35mDelta
Mon 1/196:05 pmIAD - SOU
1 stop9h 45mDelta
Deal found 10/26$809
This Delta deal was found by Cheapflights users on 10/26. 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.
Tue 12/168:40 amSOU - IAD
1 stop12h 25mDelta
Tue 1/206:05 pmIAD - SOU
1 stop9h 45mDelta
Deal found 10/26$812
This Delta deal was found by Cheapflights users on 10/26. 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 12/149:30 amSOU - IAD
1 stop11h 35mDelta
Sun 1/187:49 pmIAD - SOU
2 stops32h 01mDelta
Deal found 10/26$815
This Delta deal was found by Cheapflights users on 10/26. 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.
Tue 12/168:40 amSOU - IAD
1 stop12h 25mDelta
Sun 1/187:49 pmIAD - SOU
2 stops32h 01mDelta
Deal found 10/26$817

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 October 28, 2025.
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

Southampton

Fly to

Dulles Intl

Route

Depart

Return

Price

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 12/14

6:05 pm-4:05 pm

1 stop27h 00m

Washington, D.C. Dulles Intl

Wed 1/14

6:20 am-8:25 am

2 stops21h 05m

$745

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 12/14

6:05 pm-4:05 pm

1 stop27h 00m

Washington, D.C. Dulles Intl

Tue 1/13

6:05 pm-8:50 am

1 stop9h 45m

$745

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 12/15

8:40 am-4:05 pm

1 stop12h 25m

Washington, D.C. Dulles Intl

Tue 1/13

6:05 pm-8:50 am

1 stop9h 45m

$745

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 12/15

6:05 pm-4:05 pm

1 stop27h 00m

Washington, D.C. Dulles Intl

Wed 1/14

6:00 am-8:25 am

2 stops21h 25m

$745

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 12/17

8:40 am-4:05 pm

1 stop12h 25m

Washington, D.C. Dulles Intl

Tue 1/13

12:23 pm-8:50 am

2 stops15h 27m

$748

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Tue 12/16

5:30 pm-4:05 pm

1 stop27h 35m

Washington, D.C. Dulles Intl

Wed 1/14

5:26 pm-8:25 am

2 stops33h 59m

$748

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Tue 12/16

5:30 pm-4:05 pm

1 stop27h 35m

Washington, D.C. Dulles Intl

Tue 1/13

6:05 pm-8:50 am

1 stop9h 45m

$748

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 4/1

9:20 am-3:35 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Sun 4/5

5:50 pm-5:00 pm

1 stop18h 10m

$754

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 12/3

7:55 pm-3:35 pm

2 stops24h 40m

$921

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 1/5

8:50 pm-3:35 pm

2 stops23h 45m

$1,163

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 11 results
1
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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.

Cheapflights Insights

Everything you need to know about your flight from Southampton to Washington, D.C. Dulles Intl Airport

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

Currently, February is the cheapest month in which you can book a flight from Southampton to Washington, D.C. Dulles Intl Airport (average of $452). Flying from Southampton to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $719). 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.

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 27h. Fly via Delta 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.

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

    Currently, February is the cheapest month in which you can book a flight from Southampton to Washington, D.C. Dulles Intl Airport (average of $452). Flying from Southampton to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $719). 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

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
Woodbridge
Tysons
Arlington
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Owings Mills
Linthicum Heights
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
Bowie

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Alternative routes for Southampton to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Dulles Intl flights
Heathrow to Baltimore flights
Heathrow to Reagan-National flights
Gatwick to Dulles Intl flights
London City to Dulles Intl flights
Gatwick to Baltimore flights
Stansted to Dulles Intl flights
Luton to Dulles Intl flights
Gatwick to Reagan-National flights
Luton to Baltimore flights
London City to Reagan-National flights
Edinburgh to Dulles Intl flights
Manchester to Dulles Intl flights
Edinburgh to Reagan-National flights
Edinburgh to Baltimore flights
Manchester to Baltimore flights
Manchester to Reagan-National flights
Stansted to Baltimore flights
Newcastle upon Tyne to Dulles Intl flights
Newcastle upon Tyne to Baltimore flights
Newcastle upon Tyne to Reagan-National flights
Birmingham to Reagan-National flights
Birmingham to Baltimore flights
Birmingham to Dulles Intl flights
Leeds to Dulles Intl flights
Bristol to Dulles Intl flights
Leeds to Baltimore flights
Exeter to Dulles Intl flights
Southampton to Baltimore flights
Newquay to Baltimore flights
Norwich to Dulles Intl flights

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