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Cheap flights from Southampton to Washington, D.C. from $678

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 5/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:10 pm - 3:20 pm
SOU
-
IAD
24h 10m
1 stop
Multiple Airlines Logo
10:20 pm - 3:35 pm
IAD
-
SOU
12h 15m
1 stop
$982Multiple Airlines
Fri, Feb 27 - Tue, Mar 3
KLM Logo
5:45 pm - 5:05 pm
SOU
-
IAD
27h 20m
1 stop
KLM Logo
7:05 pm - 5:05 pm
IAD
-
SOU
18h 00m
1 stop
$1,018KLM
Sun, Mar 15 - Sun, Mar 22
KLM Logo
5:45 pm - 5:05 pm
SOU
-
IAD
27h 20m
1 stop
KLM Logo
1:19 pm - 8:20 am
IAD
-
SOU
15h 01m
2 stops
$1,022KLM
Sun, Mar 15 - Sun, Mar 22
Delta Logo
8:50 am - 8:45 pm
SOU
-
IAD
16h 55m
2 stops
Delta Logo
12:35 pm - 8:20 am
IAD
-
SOU
14h 45m
2 stops
$1,029Delta
Fri, Feb 27 - Tue, Mar 3
Aer Lingus Logo
8:10 pm - 8:55 pm
SOU
-
IAD
28h 45m
2 stops
Aer Lingus Logo
10:45 pm - 7:40 pm
IAD
-
SOU
16h 55m
2 stops
$1,123Aer Lingus
Sun, Mar 15 - Sun, Mar 22
British Airways Logo
12:25 pm - 7:30 pm
SOU
-
IAD
12h 05m
1 stop
British Airways Logo
10:00 pm - 7:40 pm
IAD
-
SOU
17h 40m
1 stop
$1,146British Airways
Wed, Mar 4 - Sun, Mar 8
British Airways Logo
12:25 pm - 7:30 pm
SOU
-
IAD
12h 05m
1 stop
British Airways Logo
10:00 pm - 7:40 pm
IAD
-
SOU
17h 40m
1 stop
$1,153British Airways
Wed, Mar 4 - Sun, Mar 8
British Airways Logo
12:25 pm - 7:30 pm
SOU
-
IAD
12h 05m
1 stop
British Airways Logo
6:05 pm - 8:45 am
IAD
-
SOU
10h 40m
1 stop
$1,154British Airways
Wed, Mar 4 - Sun, Mar 8
British Airways Logo
12:25 pm - 7:30 pm
SOU
-
IAD
12h 05m
1 stop
British Airways Logo
10:45 pm - 9:00 pm
IAD
-
SOU
18h 15m
2 stops
$1,161British Airways
Wed, Mar 4 - Sun, Mar 8
British Airways Logo
12:25 pm - 7:30 pm
SOU
-
IAD
12h 05m
1 stop
British Airways Logo
10:45 pm - 9:00 pm
IAD
-
SOU
18h 15m
2 stops
$1,166British Airways
Wed, Mar 4 - Sun, Mar 8

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
Mar 4
SOU12:25 pmSouthampton Eastleigh
12h 05m
1 stop
IAD7:30 pmWashington, D.C. Dulles Intl
Mar 8
IAD10:00 pmWashington, D.C. Dulles Intl
17h 40m
1 stop
SOU7:40 pmSouthampton Eastleigh
$1,143
British Airways
Mar 4
SOU12:25 pmSouthampton Eastleigh
12h 05m
1 stop
IAD7:30 pmWashington, D.C. Dulles Intl
Mar 8
IAD10:00 pmWashington, D.C. Dulles Intl
17h 40m
1 stop
SOU7:40 pmSouthampton Eastleigh
$1,146
British Airways
Mar 4
SOU12:25 pmSouthampton Eastleigh
12h 05m
1 stop
IAD7:30 pmWashington, D.C. Dulles Intl
Mar 8
IAD6:05 pmWashington, D.C. Dulles Intl
10h 40m
1 stop
SOU8:45 amSouthampton Eastleigh
$1,154

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 February 1, 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

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 2/27

8:10 pm-3:20 pm

1 stop24h 10m

Washington, D.C. Dulles Intl

Tue 3/3

10:20 pm-3:35 pm

1 stop12h 15m

$982

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 3/15

5:45 pm-5:05 pm

1 stop27h 20m

Washington, D.C. Dulles Intl

Sun 3/22

7:05 pm-5:05 pm

1 stop18h 00m

$1,018

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 3/15

5:45 pm-5:05 pm

1 stop27h 20m

Washington, D.C. Dulles Intl

Sun 3/22

1:19 pm-8:20 am

2 stops15h 01m

$1,022

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 2/27

8:50 am-8:45 pm

2 stops16h 55m

Washington, D.C. Dulles Intl

Tue 3/3

12:35 pm-8:20 am

2 stops14h 45m

$1,029

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 3/15

8:10 pm-8:55 pm

2 stops28h 45m

Washington, D.C. Dulles Intl

Sun 3/22

10:45 pm-7:40 pm

2 stops16h 55m

$1,123

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 3/4

12:25 pm-7:30 pm

1 stop12h 05m

Washington, D.C. Dulles Intl

Sun 3/8

10:00 pm-7:40 pm

1 stop17h 40m

$1,146

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 3/4

12:25 pm-7:30 pm

1 stop12h 05m

Washington, D.C. Dulles Intl

Sun 3/8

10:00 pm-7:40 pm

1 stop17h 40m

$1,153

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 3/4

12:25 pm-7:30 pm

1 stop12h 05m

Washington, D.C. Dulles Intl

Sun 3/8

6:05 pm-8:45 am

1 stop10h 40m

$1,154

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 3/4

12:25 pm-7:30 pm

1 stop12h 05m

Washington, D.C. Dulles Intl

Sun 3/8

10:45 pm-9:00 pm

2 stops18h 15m

$1,161

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 3/4

12:25 pm-7:30 pm

1 stop12h 05m

Washington, D.C. Dulles Intl

Sun 3/8

10:45 pm-9:00 pm

2 stops18h 15m

$1,166

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 $747. When flying out on a Monday, 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 $882.

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 $820 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 $849 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

11h 35m

Direct flights

None
The fastest flight from Southampton to Washington, D.C. Dulles Intl Airport takes 11h 35m
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 11h 35m 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
Tysons
Laurel
Colonial Beach
Silver Spring
Towson
Fredericksburg
Gaithersburg
Rockville
Manassas
Springfield
Sterling
Fairfax
Linthicum Heights

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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