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

Departing from Southampton to Washington, D.C. Dulles Intl Airport will take you 11h 55m. Southampton and Washington, D.C. Dulles Intl Airport are separated by a distance of 3639 mi.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Southampton to Washington, D.C. Dulles Intl Airport as you normally would.

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

Most people fly from Southampton Eastleigh (SOU) if they book a flight from Southampton to Washington, D.C. Dulles Intl. On average, Eastleigh has 0 outbound flights to Washington, D.C. Dulles Intl per day from 1 airline. Southampton Eastleigh is conveniently located just 3.5 mi from Southampton’s city center.

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 holiday 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.

£443+ Cheap Flights from Southampton to Washington, D.C. Dulles Intl Airport

Cheap flight deals from Southampton to Dulles Intl

Enter your travel dates to find the best prices.

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 8 September 2026.

Mon 5/1009:20 -

1 stop11h 25m

Mon 12/1020:55 -

1 stop17h 35m

Deal found 7/9£508

Thu 29/1012:25 -

1 stop11h 55m

Thu 5/1117:15 -

1 stop13h 40m

Deal found 4/9£510

Wed 7/1009:20 -

1 stop15h 05m

Sun 11/1017:15 -

1 stop18h 35m

Deal found 7/9£513

Thu 12/1109:20 -

1 stop11h 25m

Sun 15/1117:15 -

1 stop10h 35m

Deal found 6/9£540

Find flight deals from Southampton to Dulles Intl

Round-trip from	£508
One-way from	£443
Popular in	June
Cheapest in	February
Average price	£479

British Airways
5/10-12/10
2 total stops
29h 00m total
Southampton to Washington, D.C.

Search Deals

KLM
23/11-31/12
1 total stop
12h 15m total
Southampton to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£39 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£5 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

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 return flight

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Mon 23/11

08:40-15:55

1 stop12h 15m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£443

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Mon 23/11

08:40-15:55

1 stop12h 15m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£443

Fastest return journey

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Mon 30/11

12:25-19:20

1 stop11h 55m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£468

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Wed 2/12

09:20-19:20

1 stop15h 00m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£468

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 29/10

12:25-20:20

1 stop11h 55m

Washington, D.C. Dulles Intl

Thu 5/11

17:15-11:55

1 stop13h 40m

£510

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Wed 7/10

09:20-19:25

1 stop15h 05m

Washington, D.C. Dulles Intl

Sun 11/10

17:15-16:50

1 stop18h 35m

£513

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 12/11

12:25-19:20

1 stop11h 55m

Washington, D.C. Dulles Intl

Sun 15/11

21:45-19:10

2 stops16h 25m

£564

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Mon 5/10

09:05-23:23

2 stops19h 18m

Washington, D.C. Dulles Intl

Mon 12/10

12:30-08:35

2 stops15h 05m

£643

Flights are sorted by cheapest return flights first.

Deals found on 4/9

Sorted by cheapest first

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 return 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.

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Aer Lingus from Southampton to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Aer Lingus

7.3

Good

1,753 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Patrick,Sept 2026

DUB - IAD

I had a great experience. Crew was great and very accommodating.

Aer Lingus

7.3

Good

1,753 reviews

Aer Lingus

7.3

Good

1,753 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Patrick,Sept 2026

DUB - IAD

I had a great experience. Crew was great and very accommodating.

Related info for your journey

What airport do you fly from for flights from Southampton to Washington, D.C. Dulles Intl?
Most people fly from Southampton Eastleigh (SOU) if they book a flight from Southampton to Washington, D.C. Dulles Intl. On average, Eastleigh has 0 outbound flights to Washington, D.C. Dulles Intl per day from 1 airline. Southampton Eastleigh is conveniently located just 3.5 mi from Southampton’s city center.
How long is the flight from Southampton to Washington, D.C. Dulles Intl Airport?
Departing from Southampton to Washington, D.C. Dulles Intl Airport will take you 11h 55m. Southampton and Washington, D.C. Dulles Intl Airport are separated by a distance of 3639 mi.
What is the cheapest airline to fly from Southampton to Washington, D.C. Dulles Intl Airport round-trip?
Cheapflights users have booked flights from Southampton to Washington, D.C. Dulles Intl Airport round-trip from £448.
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 holiday 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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Top airline flying from Southampton to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Aer Lingus	Cheapest£448	Average£587	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

Fly with Cheapflights

How does Cheapflights help users find flights from Southampton to Dulles Intl?

Cheapflights makes it easy to find Southampton to Dulles Intl flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Southampton to Dulles Intl?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Southampton to Dulles Intl.

Can Cheapflights find flights from Southampton to Dulles Intl with no change fees?

Need flexible booking options for your flight to Dulles Intl from Southampton? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Southampton to Dulles Intl become cheaper?

Yes, Cheapflights offers price alerts on Southampton to Dulles Intl flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from Southampton to Washington, D.C. Dulles Intl Airport from £443

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/11. Fares are subject to change and may not be available on all flights or dates of travel.

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 8 September 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 8 September 2026.

Best flights from Southampton to Dulles IntlDiscover carefully curated flight deals from Southampton to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 September 2026.

Discover carefully curated flight deals from Southampton to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 September 2026.

Last-minute flights from Southampton to Dulles IntlDiscover last-minute flight deals from Southampton to Dulles Intl. Data last updated 8 September 2026 and is based on user searches.

Discover last-minute flight deals from Southampton to Dulles Intl. Data last updated 8 September 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 8 September 2026.

Search for one-way flight options from Southampton to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 8 September 2026.

Find flight deals from Southampton to Dulles Intl

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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.

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Aer Lingus from Southampton to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

What is the cheapest airline to fly from Southampton to Washington, D.C. Dulles Intl Airport round-trip?

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?

Travelling 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

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

Direct flights to District of Columbia

Book a non-stop flight to one of these other cities located in District of Columbia.

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 8 September 2026.

Search flights from Southampton to Dulles Intl by cabin class

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Southampton and Dulles Intl flights

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Can Cheapflights find flights from Southampton to Dulles Intl with no change fees?

Can Cheapflights notify me if prices for flights from Southampton to Dulles Intl become cheaper?

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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 8 September 2026.

Best flights from Southampton to Dulles Intl
Discover carefully curated flight deals from Southampton to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 September 2026.

Last-minute flights from Southampton to Dulles Intl
Discover last-minute flight deals from Southampton to Dulles Intl. Data last updated 8 September 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 8 September 2026.