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 55m. Fly via British Airways to get the fastest option. There are 3639 mi between Southampton and Washington, D.C. Dulles Intl Airport.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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

When flying from Southampton to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

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.

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.

$600+ Cheap Flights from Southampton to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Southampton to Dulles Intl

Cheapest

Best

Last-minute

One-way

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 September 13, 2026.

Sun 10/259:20 am -

1 stop15h 00m

Sun 11/15:15 pm -

1 stop13h 40m

Deal found 9/10

$688

Thu 10/2912:25 pm -

1 stop11h 55m

Thu 11/55:15 pm -

1 stop13h 40m

Deal found 9/12

$691

Wed 10/288:00 pm -

1 stop28h 20m

Wed 11/48:50 pm -

1 stop17h 40m

Deal found 9/13

$701

Fri 10/98:00 pm -

1 stop24h 45m

Fri 10/165:15 pm -

1 stop10h 25m

Deal found 9/11

$702

Thu 11/129:20 am -

1 stop11h 25m

Sun 11/155:15 pm -

1 stop10h 35m

Deal found 9/11

$731

Tue 12/89:20 am -

1 stop11h 25m

Mon 1/115:15 pm -

1 stop13h 35m

Deal found 9/13

$732

Tue 12/89:20 am -

1 stop15h 00m

Sun 1/109:45 pm -

2 stops16h 00m

Deal found 9/13

$764

Best flights from Southampton to Dulles Intl
Discover carefully curated flight deals from Southampton to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.

Thu 10/2912:25 pm -

1 stop11h 55m

Thu 11/55:15 pm -

1 stop13h 40m

Deal found 9/12

$691

Thu 10/298:40 am -

1 stop12h 05m

Thu 11/511:10 am -

2 stops16h 00m

Deal found 9/9

$860

Sun 12/139:20 am -

1 stop11h 25m

Thu 1/145:15 pm -

1 stop10h 35m

Deal found 9/13

$732

Mon 12/149:20 am -

1 stop15h 00m

Fri 1/85:15 pm -

1 stop10h 30m

Deal found 9/13

$732

Wed 12/99:20 am -

1 stop11h 25m

Mon 1/116:05 pm -

2 stops13h 00m

Deal found 9/13

$764

Thu 11/1212:25 pm -

1 stop11h 55m

Sun 11/159:45 pm -

2 stops16h 25m

Deal found 9/11

$764

Wed 12/98:00 pm -

1 stop24h 45m

Tue 1/126:05 pm -

2 stops16h 35m

Deal found 9/13

$774

Fri 12/119:20 am -

1 stop11h 25m

Fri 1/89:45 pm -

2 stops33h 20m

Deal found 9/13

$775

Last-minute flights from Southampton to Dulles Intl
Discover last-minute flight deals from Southampton to Dulles Intl. Data last updated September 13, 2026 and is based on user searches.

Fri 10/98:00 pm -

1 stop24h 45m

Fri 10/165:15 pm -

1 stop10h 25m

Deal found 9/11

$702

Sun 10/259:20 am -

1 stop15h 00m

Sun 11/15:15 pm -

1 stop13h 40m

Deal found 9/10

$688

Wed 10/288:00 pm -

1 stop28h 20m

Wed 11/48:50 pm -

1 stop17h 40m

Deal found 9/13

$701

Thu 10/2912:25 pm -

1 stop11h 55m

Thu 11/55:15 pm -

1 stop13h 40m

Deal found 9/12

$691

Thu 10/298:40 am -

1 stop12h 05m

Thu 11/511:10 am -

2 stops16h 00m

Deal found 9/9

$860

Find flight deals from Southampton to Dulles Intl

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$688 (TravelUp)
One-way from	$600 (Delta)
Popular in	June
Cheapest in	February
Average price	$655

Provider with most accurate pricing for Southampton Eastleigh-Washington, D.C. Dulles Intl flight deals.

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Provider most trusted by Cheapflights users for Southampton Eastleigh-Washington, D.C. Dulles Intl flights.

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From Southampton Eastleigh to Washington, D.C. Dulles Intl

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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 ($71 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).

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Average for round-trip flights in September 2026

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Cheapflights Fare Finder

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 Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Mon 11/23

8:40 am-3:55 pm

1 stop12h 15m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$600

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Thu 10/29

12:25 pm-8:20 pm

1 stop11h 55m

Washington, D.C. Dulles Intl

Thu 11/5

5:15 pm-11:55 am

1 stop13h 40m

$691

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Sun 12/13

9:20 am-3:45 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

Thu 1/14

5:15 pm-8:50 am

1 stop10h 35m

$732

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Mon 12/14

9:20 am-7:20 pm

1 stop15h 00m

Washington, D.C. Dulles Intl

Fri 1/8

5:15 pm-8:45 am

1 stop10h 30m

$732

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Wed 12/9

9:20 am-3:45 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

Mon 1/11

6:05 pm-12:05 pm

2 stops13h 00m

$764

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Thu 11/12

12:25 pm-7:20 pm

1 stop11h 55m

Washington, D.C. Dulles Intl

Sun 11/15

9:45 pm-7:10 pm

2 stops16h 25m

$764

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Wed 12/9

8:00 pm-3:45 pm

1 stop24h 45m

Washington, D.C. Dulles Intl

Tue 1/12

6:05 pm-3:40 pm

2 stops16h 35m

$774

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Fri 12/11

9:20 am-3:45 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

Fri 1/8

9:45 pm-12:05 pm

2 stops33h 20m

$775

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Thu 10/29

8:40 am-4:45 pm

1 stop12h 05m

Washington, D.C. Dulles Intl

Thu 11/5

11:10 am-8:10 am

2 stops16h 00m

$860

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Tue 9/29

9:15 am-7:35 pm

1 stop15h 20m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$1,349

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 12 resultsSorted by cheapest first

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.

SOU-IAD

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

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 55m. 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.

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$600+ 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 11/23. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Southampton to Dulles Intl with Cheapflights

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Cheap flight deals from Southampton to Dulles Intl

Cheapest flights from Southampton to Dulles IntlExplore 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 September 13, 2026.

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 September 13, 2026.

Best flights from Southampton to Dulles IntlDiscover carefully curated flight deals from Southampton to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.

Discover carefully curated flight deals from Southampton to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.

Last-minute flights from Southampton to Dulles IntlDiscover last-minute flight deals from Southampton to Dulles Intl. Data last updated September 13, 2026 and is based on user searches.

Discover last-minute flight deals from Southampton to Dulles Intl. Data last updated September 13, 2026 and is based on user searches.

One-way flights from Southampton to Dulles IntlSearch for one-way flight options from Southampton to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.

Search for one-way flight options from Southampton to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.

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Use the filters below to find and compare flights from Southampton to Washington, D.C. Dulles Intl Airport that are best for you.

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.

Related info for your journey

What airport do you fly from for flights from Southampton to Washington, D.C. Dulles Intl?

How long is the flight from Southampton to Washington, D.C. Dulles Intl Airport?

Can I find deals for flights from Southampton to Dulles Intl that include hotel bookings?

How can I find direct flights from Southampton to Dulles Intl?

Can I find deals for business class flights from Southampton to Dulles Intl?

Traveling to a place near Washington, D.C. Dulles Intl Airport?

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Alternative routes for Southampton to Dulles Intl

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Complete your trip to Dulles Intl by adding a car rental and/or hotel reservation to your travel itinerary.

Other flights to Dulles Intl

Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 13, 2026.

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Southampton and Dulles Intl flights

Browse other Southampton and Dulles Intl flight options. Last updated on September 13, 2026.

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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 September 13, 2026.

Best flights from Southampton to Dulles Intl
Discover carefully curated flight deals from Southampton to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.

Last-minute flights from Southampton to Dulles Intl
Discover last-minute flight deals from Southampton to Dulles Intl. Data last updated September 13, 2026 and is based on user searches.

One-way flights from Southampton to Dulles Intl
Search for one-way flight options from Southampton to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.