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Cheap flights from Southampton to Washington, D.C. from $503

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Southampton to Washington, D.C. departing on 5/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
9:20 am - 7:25 pm
SOU
-
IAD
15h 05m
1 stop
Aer Lingus Logo
5:15 pm - 8:40 am
IAD
-
SOU
10h 25m
1 stop
$751Aer Lingus
Sun, Apr 26 - Sun, May 3
Aer Lingus Logo
8:00 pm - 3:45 pm
SOU
-
IAD
24h 45m
1 stop
Aer Lingus Logo
5:15 pm - 8:40 am
IAD
-
SOU
10h 25m
1 stop
$825Aer Lingus
Wed, Apr 29 - Wed, May 6
Aer Lingus Logo
8:00 pm - 3:45 pm
SOU
-
IAD
24h 45m
1 stop
Aer Lingus Logo
8:55 pm - 8:35 am
IAD
-
SOU
30h 40m
1 stop
$849Aer Lingus
Fri, May 1 - Fri, May 8
Multiple Airlines Logo
6:50 am - 7:25 pm
SOU
-
IAD
17h 35m
2 stops
Multiple Airlines Logo
5:15 pm - 8:40 am
IAD
-
SOU
10h 25m
1 stop
$863Multiple Airlines
Wed, Apr 29 - Wed, May 6
Multiple Airlines Logo
8:00 pm - 3:45 pm
SOU
-
IAD
24h 45m
1 stop
Multiple Airlines Logo
5:15 pm - 11:45 am
IAD
-
SOU
13h 30m
2 stops
$881Multiple Airlines
Fri, May 1 - Fri, May 8
British Airways Logo
7:55 pm - 3:50 pm
SOU
-
IAD
24h 55m
2 stops
British Airways Logo
5:15 pm - 8:05 am
IAD
-
SOU
9h 50m
1 stop
$933British Airways
Mon, May 4 - Tue, May 12
British Airways Logo
6:50 am - 3:50 pm
SOU
-
IAD
14h 00m
2 stops
British Airways Logo
5:15 pm - 8:05 am
IAD
-
SOU
9h 50m
1 stop
$934British Airways
Wed, May 6 - Tue, May 12
Aer Lingus Logo
9:20 am - 3:45 pm
SOU
-
IAD
11h 25m
1 stop
Aer Lingus Logo
5:15 pm - 8:40 am
IAD
-
SOU
10h 25m
1 stop
$935Aer Lingus
Wed, Apr 1 - Sun, Apr 5
British Airways Logo
9:20 am - 3:45 pm
SOU
-
IAD
11h 25m
1 stop
British Airways Logo
5:15 pm - 8:40 am
IAD
-
SOU
10h 25m
1 stop
$943British Airways
Wed, Apr 15 - Sun, Apr 19
British Airways Logo
7:55 pm - 3:50 pm
SOU
-
IAD
24h 55m
2 stops
British Airways Logo
10:25 pm - 8:55 pm
IAD
-
SOU
17h 30m
2 stops
$945British Airways
Mon, May 4 - Mon, May 11

Aer Lingus flights from Southampton to Washington, D.C. Dulles Intl Airport

Our best Aer Lingus deals on Southampton to Washington, D.C. Dulles Intl Airport flight tickets
Aer Lingus
Apr 26
SOU9:20 amSouthampton Eastleigh
15h 05m
1 stop
IAD7:25 pmWashington, D.C. Dulles Intl
May 3
IAD5:15 pmWashington, D.C. Dulles Intl
10h 25m
1 stop
SOU8:40 amSouthampton Eastleigh
$751
Aer Lingus
Apr 29
SOU8:00 pmSouthampton Eastleigh
24h 45m
1 stop
IAD3:45 pmWashington, D.C. Dulles Intl
May 6
IAD5:15 pmWashington, D.C. Dulles Intl
10h 25m
1 stop
SOU8:40 amSouthampton Eastleigh
$825
Aer Lingus
May 1
SOU8:00 pmSouthampton Eastleigh
24h 45m
1 stop
IAD3:45 pmWashington, D.C. Dulles Intl
May 8
IAD8:55 pmWashington, D.C. Dulles Intl
30h 40m
1 stop
SOU8:35 amSouthampton Eastleigh
$849

British Airways flights from Southampton to Washington, D.C. Dulles Intl Airport

Our best British Airways deals on Southampton to Washington, D.C. Dulles Intl Airport flight tickets
British Airways
May 4
SOU7:55 pmSouthampton Eastleigh
24h 55m
2 stops
IAD3:50 pmWashington, D.C. Dulles Intl
May 11
IAD5:15 pmWashington, D.C. Dulles Intl
10h 25m
1 stop
SOU8:40 amSouthampton Eastleigh
$933
British Airways
May 6
SOU6:50 amSouthampton Eastleigh
14h 00m
2 stops
IAD3:50 pmWashington, D.C. Dulles Intl
May 11
IAD5:15 pmWashington, D.C. Dulles Intl
10h 25m
1 stop
SOU8:40 amSouthampton Eastleigh
$934
British Airways
Apr 15
SOU9:20 amSouthampton Eastleigh
11h 25m
1 stop
IAD3:45 pmWashington, D.C. Dulles Intl
Apr 19
IAD5:15 pmWashington, D.C. Dulles Intl
10h 25m
1 stop
SOU8:40 amSouthampton Eastleigh
$943

momondo Fare Finder

 
Customize your flight search to find flights from Southampton to Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated March 17, 2026.
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

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 4/26

9:20 am-7:25 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Sun 5/3

5:15 pm-8:40 am

1 stop10h 25m

$751

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 4/29

8:00 pm-3:45 pm

1 stop24h 45m

Washington, D.C. Dulles Intl

Wed 5/6

5:15 pm-8:40 am

1 stop10h 25m

$825

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 5/1

8:00 pm-3:45 pm

1 stop24h 45m

Washington, D.C. Dulles Intl

Fri 5/8

8:55 pm-8:35 am

1 stop30h 40m

$849

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 4/29

6:50 am-7:25 pm

2 stops17h 35m

Washington, D.C. Dulles Intl

Wed 5/6

5:15 pm-8:40 am

1 stop10h 25m

$863

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 5/1

8:00 pm-3:45 pm

1 stop24h 45m

Washington, D.C. Dulles Intl

Fri 5/8

5:15 pm-11:45 am

2 stops13h 30m

$881

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 5/4

7:55 pm-3:50 pm

2 stops24h 55m

Washington, D.C. Dulles Intl

Tue 5/12

5:15 pm-8:05 am

1 stop9h 50m

$933

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 5/6

6:50 am-3:50 pm

2 stops14h 00m

Washington, D.C. Dulles Intl

Tue 5/12

5:15 pm-8:05 am

1 stop9h 50m

$934
Quickest round-trip

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 4/1

9:20 am-3:45 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

Sun 4/5

5:15 pm-8:40 am

1 stop10h 25m

$935

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 4/15

9:20 am-3:45 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

Sun 4/19

5:15 pm-8:40 am

1 stop10h 25m

$943

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 5/4

7:55 pm-3:50 pm

2 stops24h 55m

Washington, D.C. Dulles Intl

Mon 5/11

10:25 pm-8:55 pm

2 stops17h 30m

$945

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Southampton to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Thursday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $748. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Southampton to Washington, D.C. Dulles Intl Airport for around $900.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from Southampton in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $806 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $841 on average. Flights to Washington, D.C. Dulles Intl Airport from Southampton at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Southampton to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Southampton to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Southampton to Washington, D.C. Dulles Intl Airport (SOU to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Southampton to Washington, D.C. Dulles Intl Airport

Fastest flight time

12h 05m

Direct flights

None
The fastest flight from Southampton to Washington, D.C. Dulles Intl Airport takes 12h 05m
There are no direct flights from Southampton to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from Southampton to Washington, D.C. Dulles Intl Airport.
Search flight deals

  • How far is Southampton Eastleigh to Washington, D.C. Dulles Intl by plane?

    Southampton Eastleigh and Washington, D.C. Dulles Intl are 3637.8 mi apart from one another. Typically, this will take 12h 05m by plane in normal conditions.

  • When did momondo last update prices for flights from Southampton Eastleigh Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from Southampton Eastleigh Airport to Washington, D.C. Dulles Intl Airport are updated daily.

  • How old do you have to be to fly from Southampton Eastleigh Airport to Washington, D.C. Dulles Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Southampton Eastleigh Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The necessary travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Waldorf
Woodbridge
Colonial Beach
Laurel
Towson
Gaithersburg
Silver Spring
Fredericksburg
Rockville
Tysons
Manassas
Springfield
Linthicum Heights
Bethesda
Sterling

Why use momondo?

Why should I use momondo to find a flight deal from Southampton to Washington, D.C.?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Southampton to Washington, D.C.. momondo saves you time and could save you money on your trip.

Can I find flights from Southampton to Washington, D.C. with flexible booking policies on momondo?

Yes. All flights to Washington, D.C. from Southampton on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Southampton to Washington, D.C.?

Once you have performed a search for Southampton to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Southampton to Washington, D.C. right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Southampton to Washington, D.C. flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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