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$494+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SOU
juin 17 — juin 241
mar. 6/17
mar. 6/24
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 juin 12, 2025.

Round-trip from

$809
(Delta)

One-way from

$707
(KAYAK)

Popular in

June

Cheapest in

November

Average price

$1,382
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. 23% potential increase in price ($286 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($51 potential savings vs. average RT price).
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Average for round-trip flights in June 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 juin 12, 2025.

This Delta deal was found by Cheapflights users on 6/10. 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.
lun. 9/15:25 pmIAD - SOU
1 stop10h 25mDelta
mar. 9/95:35 pmSOU - IAD
1 stop27h 00mDelta
Deal found 6/10$809
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.
mer. 9/108:23 pmIAD - SOU
2 stops15h 37mKLM
mer. 9/245:35 pmSOU - IAD
1 stop27h 00mKLM
Deal found 6/9$814
This Virgin Atlantic 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 10/195:25 pmIAD - SOU
1 stop10h 20mVirgin Atlantic
mar. 10/289:00 amSOU - IAD
2 stops18h 00mVirgin Atlantic
Deal found 6/9$819
This Mytrip deal was found by Cheapflights users on 6/10. 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.
dim. 8/39:45 amIAD - SOU
2 stops26h 00mMultiple Airlines
mar. 8/198:00 pmSOU - IAD
2 stops24h 50mMultiple Airlines
Deal found 6/10$864
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 7/95:20 pmIAD - SOU
1 stop10h 20mAer Lingus
mer. 7/169:10 amSOU - IAD
1 stop15h 20mAer Lingus
Deal found 6/11$951
This British Airways deal was found by Cheapflights users on 6/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 10/910:45 pmIAD - SOU
2 stops15h 40mBritish Airways
mer. 10/229:10 amSOU - IAD
1 stop15h 20mBritish Airways
Deal found 6/10$1,123

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 juin 12, 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

lun. 9/1

5:25 pm-5:00 pm

1 stop18h 35m

Southampton Eastleigh

lun. 9/15

5:35 pm-3:35 pm

1 stop27h 00m

$809

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

mer. 9/10

8:23 pm-5:00 pm

2 stops15h 37m

Southampton Eastleigh

mer. 9/24

5:35 pm-3:35 pm

1 stop27h 00m

$814

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

dim. 10/19

5:25 pm-8:45 am

1 stop10h 20m

Southampton Eastleigh

mar. 10/28

9:00 am-11:00 pm

2 stops18h 00m

$819

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

dim. 8/3

9:45 am-4:45 pm

2 stops26h 00m

Southampton Eastleigh

mar. 8/19

8:00 pm-3:50 pm

2 stops24h 50m

$864

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

mer. 7/9

5:20 pm-8:40 am

1 stop10h 20m

Southampton Eastleigh

mer. 7/16

9:10 am-7:30 pm

1 stop15h 20m

$951

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

jeu. 10/9

10:45 pm-7:25 pm

2 stops15h 40m

Southampton Eastleigh

mer. 10/22

9:10 am-7:30 pm

1 stop15h 20m

$1,123

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

ven. 9/26

5:25 pm-8:45 am

1 stop10h 20m

$494

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

ven. 9/26

12:30 pm-8:45 am

2 stops15h 15m

$498

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

mar. 11/18

9:00 pm-8:45 am

1 stop30h 45m

$586

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 juin 12, 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.

Rainfall in Southampton by month

Plan your trip to Southampton by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Southampton ranges from 1.0 - 3.0 inches per month. December is typically the wettest month, when rainfall can reach 3.0 in. July is typically the driest time to visit Southampton when rainfall is around 1.0 in.

Temperature in Southampton by month

Plan your trip to Southampton by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Southampton, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

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 juin 12, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Virgin Atlantic from Washington, D.C. to Southampton to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

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!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

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!
Virgin Atlantic
7.4
Good
652 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

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
7.1
Good
1,117 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

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!
British Airways
6.6
Okay
7,008 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

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. 3 airlines have flights to Southampton Eastleigh from Washington, D.C. Dulles Intl on a regular basis.

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

    Currently priced at $809, Delta will fly you from Washington, D.C. Dulles Intl Airport to Southampton and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from KLM and Aer Lingus - these airlines can fly you to your destination from $814 and $951, respectively. Delta is priced at 13% lower than the current average price of a flight leaving 3 months from now.

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

Top 3 airlines flying from Dulles Intl to Southampton

Discover the top 3 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 juin 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$646Average$900FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$721Average$1,206FlexibilityNo cancel feeOn-time75%
DeltaCheapest$778Average$1,117FlexibilityNo cancel feeOn-timeN/A

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