HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Southampton

$742+ Cheap flights from Dulles Intl (IAD) to Southampton (SOU)

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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOU
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Southampton with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$742
(Booking.com)

Popular in

June

Cheapest in

September

Average price

$675
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
Highest demand for flights based on searches. 11% potential increase in price ($93 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 October 2025
Search Deals

Find 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 October 28, 2025.

This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:05 pmIAD - SOU
1 stop18h 20mVirgin Atlantic
Wed 12/175:30 pmSOU - IAD
1 stop27h 35mVirgin Atlantic
Deal found 10/26$742
This Netflights 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1012:19 pmIAD - SOU
2 stops15h 01mMultiple Airlines
Wed 12/178:40 amSOU - IAD
1 stop12h 25mMultiple Airlines
Deal found 10/26$758
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:05 pmIAD - SOU
1 stop9h 45mDelta
Wed 11/268:40 amSOU - IAD
1 stop12h 25mDelta
Deal found 10/27$761
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/36:05 pmIAD - SOU
1 stop17h 55mDelta
Tue 11/185:30 pmSOU - IAD
1 stop27h 35mDelta
Deal found 10/27$763
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:20 pmIAD - SOU
2 stops16h 15mAer Lingus
Wed 12/178:10 pmSOU - IAD
2 stops28h 45mAer Lingus
Deal found 10/26$930
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/119:00 pmIAD - SOU
1 stop13h 35mAer Lingus
Mon 12/154:05 pmSOU - IAD
1 stop28h 30mAer Lingus
Deal found 10/26$1,001
This Mytrip deal was found by Cheapflights users on 10/25. 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.
Tue 12/96:00 pmIAD - SOU
3 stops33h 45mMultiple Airlines
Tue 12/169:20 amSOU - IAD
2 stops35h 30mMultiple Airlines
Deal found 10/25$1,137

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 October 28, 2025.
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

Wed 12/10

12:19 pm-8:20 am

2 stops15h 01m

Southampton Eastleigh

Wed 12/17

8:40 am-4:05 pm

1 stop12h 25m

$758

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 12/9

6:05 pm-5:00 pm

1 stop17h 55m

Southampton Eastleigh

Tue 12/16

8:40 am-4:05 pm

1 stop12h 25m

$761

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 11/15

6:05 pm-8:50 am

1 stop9h 45m

Southampton Eastleigh

Wed 11/26

8:40 am-4:05 pm

1 stop12h 25m

$761

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 12/10

6:20 pm-3:35 pm

2 stops16h 15m

Southampton Eastleigh

Wed 12/17

8:10 pm-7:55 pm

2 stops28h 45m

$930

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 12/9

6:00 pm-8:45 am

3 stops33h 45m

Southampton Eastleigh

Tue 12/16

9:20 am-3:50 pm

2 stops35h 30m

$1,137

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sat 11/8

5:05 pm-8:45 am

1 stop10h 40m

Southampton Eastleigh

Sat 11/15

9:30 am-7:30 pm

1 stop15h 00m

$1,166

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Compare providers for flights from Dulles Intl to Southampton

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Southampton in October.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Southampton flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Dulles Intl Airport-Southampton flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Southampton (average of $432). Flying from Washington, D.C. Dulles Intl Airport to Southampton in June is currently the most expensive (average of $748). 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.

What is the cheapest time of day to fly from IAD to SOU?

Find hourly flight availability from Dulles Intl to Southampton. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 28, 2025.

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to Southampton in the evening. By choosing this option you can save up to 36% on the cost of your flight, compared to a flight at noon.

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 October 28, 2025.
See what other customers who have flown with Delta and 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.
Delta
7.9
Good
7,996 reviews

Crew

8.5

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,996 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Aer Lingus
7.2
Good
1,360 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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. 2 airlines have 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 17h 55m. Delta provides one of the quickest options available for as low as $761. Washington, D.C. Dulles Intl Airport and Southampton are separated by a distance of 3639 mi.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Southampton round-trip?

    Currently priced at $677, 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. Check Cheapflights for deals on Delta for as low as $785.

  • 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Southampton (average of $432). Flying from Washington, D.C. Dulles Intl Airport to Southampton in June is currently the most expensive (average of $748). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Baltimore to Heathrow flights
Reagan-National to Heathrow flights
Dulles Intl to Gatwick flights
Dulles Intl to London City flights
Baltimore to Gatwick flights
Reagan-National to Gatwick flights
Dulles Intl to Stansted flights
Dulles Intl to Luton flights
Dulles Intl to Edinburgh flights
Baltimore to Luton flights
Baltimore to London City flights
Reagan-National to London City flights
Reagan-National to Luton flights
Baltimore to Edinburgh flights
Reagan-National to Edinburgh flights
Baltimore to Stansted flights
Dulles Intl to Manchester flights
Baltimore to Manchester flights
Reagan-National to Manchester flights
Reagan-National to Stansted flights
Dulles Intl to Liverpool flights
Dulles Intl to Leeds flights
Dulles Intl to Birmingham flights
Reagan-National to Birmingham flights
Baltimore to Birmingham flights
Dulles Intl to Bristol flights
Dulles Intl to Southend flights
Baltimore to Liverpool flights
Dulles Intl to Newcastle upon Tyne flights
Baltimore to Bristol flights
Baltimore to Leeds flights
Reagan-National to Bristol flights
Baltimore to Newcastle upon Tyne flights
Reagan-National to Newcastle upon Tyne flights
Reagan-National to Leeds flights
Dulles Intl to Exeter flights
Baltimore to Southampton flights
Reagan-National to Southampton flights
Baltimore to Southend flights
Reagan-National to Liverpool flights
Dulles Intl to Newquay flights
Baltimore to Newquay flights
Baltimore to Exeter flights
Dulles Intl to East Midlands flights
Reagan-National to Newquay flights

Top 2 airlines flying from Dulles Intl to Southampton

Discover the top 2 airlines 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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$677Average$900FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$785Average$1,172FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.