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$475+ Cheap flights from Dulles Intl (IAD) to Southampton (SOU)

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 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOU
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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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 septiembre 11, 2025.

Round-trip from

$740
(Kiwi.com)

One-way from

$475
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$653
From Washington, D.C. Dulles Intl to Southampton Eastleigh
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One-way flight from Washington, D.C. Dulles Intl to Southampton Eastleigh
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Highest demand for flights based on searches. 11% potential increase in price ($98 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 septiembre 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/266:05 pmIAD - SOU
1 stop10h 40mAer Lingus
dom. 11/29:30 amSOU - IAD
1 stop15h 00mAer Lingus
Deal found 9/11$740
This Mytrip deal was found by Cheapflights users on 9/10. 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.
sáb. 10/256:20 pmIAD - SOU
1 stop10h 25mAer Lingus
sáb. 11/19:30 amSOU - IAD
1 stop15h 00mAer Lingus
Deal found 9/10$745
This Delta deal was found by Cheapflights users on 9/10. 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.
jue. 10/307:05 pmIAD - SOU
1 stop17h 55mDelta
mié. 11/128:40 amSOU - IAD
1 stop12h 25mDelta
Deal found 9/10$812
This Delta deal was found by Cheapflights users on 9/10. 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.
jue. 10/306:05 amIAD - SOU
2 stops22h 00mDelta
lun. 11/106:05 pmSOU - IAD
1 stop27h 00mDelta
Deal found 9/10$816
This Delta deal was found by Cheapflights users on 9/10. 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.
vie. 10/317:05 pmIAD - SOU
1 stop9h 45mDelta
jue. 11/138:50 amSOU - IAD
2 stops19h 13mDelta
Deal found 9/10$822
This KLM deal was found by Cheapflights users on 9/10. 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.
mié. 9/108:23 pmIAD - SOU
2 stops15h 37mKLM
mié. 9/249:20 amSOU - IAD
2 stops19h 18mKLM
Deal found 9/10$826
This Mytrip deal was found by Cheapflights users on 9/10. 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.
sáb. 10/258:25 pmIAD - SOU
2 stops17h 25mMultiple Airlines
sáb. 11/19:40 amSOU - IAD
2 stops14h 50mMultiple Airlines
Deal found 9/10$838
This Mytrip deal was found by Cheapflights users on 9/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/2610:00 pmIAD - SOU
2 stops15h 35mMultiple Airlines
dom. 11/29:30 amSOU - IAD
1 stop15h 00mMultiple Airlines
Deal found 9/11$885
This KLM deal was found by Cheapflights users on 9/10. 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.
sáb. 10/255:25 pmIAD - SOU
1 stop20h 00mKLM
sáb. 11/15:30 pmSOU - IAD
2 stops27h 59mKLM
Deal found 9/10$897
This KLM deal was found by Cheapflights users on 9/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/95:25 pmIAD - SOU
1 stop10h 20mKLM
vie. 10/249:20 amSOU - IAD
2 stops17h 11mKLM
Deal found 9/11$947

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 septiembre 11, 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

vie. 10/31

7:05 pm-8:50 am

1 stop9h 45m

Southampton Eastleigh

vie. 11/14

5:30 pm-4:05 pm

1 stop27h 35m

$812

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

jue. 10/9

5:25 pm-8:45 am

1 stop10h 20m

Southampton Eastleigh

vie. 10/24

9:20 am-3:35 pm

1 stop11h 15m

$812

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

mar. 11/4

6:05 pm-5:00 pm

1 stop17h 55m

Southampton Eastleigh

jue. 11/13

6:05 pm-4:05 pm

1 stop27h 00m

$812

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

mié. 11/5

6:05 pm-5:25 pm

1 stop18h 20m

Southampton Eastleigh

jue. 11/13

6:05 pm-4:05 pm

1 stop27h 00m

$812

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

vie. 10/31

7:05 pm-8:50 am

1 stop9h 45m

Southampton Eastleigh

dom. 11/9

6:05 pm-4:05 pm

1 stop27h 00m

$812

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

mié. 11/5

6:05 pm-5:25 pm

1 stop18h 20m

Southampton Eastleigh

dom. 11/9

6:05 pm-4:05 pm

1 stop27h 00m

$812

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

lun. 11/3

6:05 pm-5:00 pm

1 stop17h 55m

Southampton Eastleigh

lun. 11/10

6:05 pm-4:05 pm

1 stop27h 00m

$812

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

mar. 11/4

6:05 pm-5:00 pm

1 stop17h 55m

Southampton Eastleigh

mar. 11/11

8:40 am-4:05 pm

1 stop12h 25m

$812

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

jue. 10/30

7:05 pm-5:00 pm

1 stop17h 55m

Southampton Eastleigh

mar. 11/11

5:30 pm-4:05 pm

1 stop27h 35m

$812

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

mié. 11/5

6:05 pm-5:25 pm

1 stop18h 20m

Southampton Eastleigh

vie. 11/14

5:30 pm-4:05 pm

1 stop27h 35m

$812

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 22 results
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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 $787). Flying from Washington, D.C. Dulles Intl Airport to Southampton in June is currently the most expensive (average of $1,308). 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 septiembre 11, 2025.

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to Southampton at noon. By choosing this option you can save up to 7% on the cost of your flight, compared to a flight in the morning.

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 septiembre 11, 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
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Aer Lingus
7.2
Good
1,271 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 9h 45m. Delta provides one of the quickest options available for as low as $812. 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 $778.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Southampton one-way?

    The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to Southampton are Aer Lingus ($482), KLM ($494), and Delta ($494).

  • 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 $787). Flying from Washington, D.C. Dulles Intl Airport to Southampton in June is currently the most expensive (average of $1,308). 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

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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
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Reagan-National to Heathrow flights
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Reagan-National to London City flights
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Dulles Intl to Manchester flights
Baltimore to Manchester flights
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Reagan-National to Stansted flights
Dulles Intl to Birmingham flights
Baltimore to Birmingham flights
Reagan-National to Birmingham flights
Dulles Intl to Leeds flights
Dulles Intl to Liverpool flights
Reagan-National to Luton flights
Baltimore to Leeds flights
Dulles Intl to Newcastle upon Tyne flights
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Baltimore to Southampton flights
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Baltimore to Newcastle upon Tyne flights
Reagan-National to Newcastle upon Tyne flights
Dulles Intl to Exeter flights
Baltimore to East Midlands flights
Dulles Intl to Newquay flights
Baltimore to Southend flights
Dulles Intl to Doncaster flights
Reagan-National to East Midlands flights
Dulles Intl to East Midlands 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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$677Average$812FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$778Average$1,119FlexibilityNo cancel feeOn-timeN/A

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