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Cheap flights from Southampton to Washington, D.C. from $590

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 8/22. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
9:20 am - 7:00 pm
SOU
-
IAD
14h 40m
1 stop
Aer Lingus Logo
9:00 pm - 7:30 pm
IAD
-
SOU
17h 30m
1 stop
$842Aer Lingus
Sat, Jun 6 - Fri, Jun 12
Aer Lingus Logo
9:20 am - 4:35 pm
SOU
-
IAD
11h 15m
1 stop
Aer Lingus Logo
5:05 pm - 4:35 pm
IAD
-
SOU
18h 30m
1 stop
$849Aer Lingus
Thu, Oct 29 - Thu, Nov 5
Aer Lingus Logo
9:20 am - 4:35 pm
SOU
-
IAD
11h 15m
1 stop
Aer Lingus Logo
9:00 pm - 7:30 pm
IAD
-
SOU
17h 30m
1 stop
$911Aer Lingus
Thu, Oct 29 - Thu, Nov 5
Multiple Airlines Logo
9:20 am - 4:35 pm
SOU
-
IAD
11h 15m
1 stop
Multiple Airlines Logo
9:45 pm - 7:30 pm
IAD
-
SOU
16h 45m
2 stops
$976Multiple Airlines
Thu, Oct 29 - Thu, Nov 5
Multiple Airlines Logo
9:20 am - 4:35 pm
SOU
-
IAD
11h 15m
1 stop
Multiple Airlines Logo
9:45 pm - 7:30 pm
IAD
-
SOU
16h 45m
2 stops
$978Multiple Airlines
Thu, Oct 29 - Thu, Nov 5
Multiple Airlines Logo
6:25 pm - 7:00 pm
SOU
-
IAD
29h 35m
2 stops
Multiple Airlines Logo
5:15 pm - 4:50 pm
IAD
-
SOU
18h 35m
1 stop
$979Multiple Airlines
Fri, Jun 12 - Tue, Jun 16
Multiple Airlines Logo
9:20 am - 3:03 pm
SOU
-
IAD
34h 43m
3 stops
Multiple Airlines Logo
3:45 pm - 7:30 pm
IAD
-
SOU
22h 45m
3 stops
$986Multiple Airlines
Tue, Jun 9 - Mon, Jun 15
Multiple Airlines Logo
9:20 am - 4:35 pm
SOU
-
IAD
11h 15m
1 stop
Multiple Airlines Logo
9:45 pm - 7:30 pm
IAD
-
SOU
16h 45m
2 stops
$1,001Multiple Airlines
Thu, Oct 29 - Thu, Nov 5
Multiple Airlines Logo
9:20 am - 8:29 pm
SOU
-
IAD
16h 09m
2 stops
Multiple Airlines Logo
3:45 pm - 4:50 pm
IAD
-
SOU
20h 05m
3 stops
$1,016Multiple Airlines
Tue, Jun 9 - Mon, Jun 15
Aer Lingus Logo
9:20 am - 7:00 pm
SOU
-
IAD
14h 40m
1 stop
Aer Lingus Logo
5:00 pm - 7:30 pm
IAD
-
SOU
21h 30m
2 stops
$1,027Aer Lingus
Sat, Jun 6 - Fri, Jun 12

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
Jun 6
SOU9:20 amSouthampton Eastleigh
14h 40m
1 stop
IAD7:00 pmWashington, D.C. Dulles Intl
Jun 12
IAD9:00 pmWashington, D.C. Dulles Intl
17h 30m
1 stop
SOU7:30 pmSouthampton Eastleigh
$842
Aer Lingus
Oct 29
SOU9:20 amSouthampton Eastleigh
11h 15m
1 stop
IAD4:35 pmWashington, D.C. Dulles Intl
Nov 5
IAD5:05 pmWashington, D.C. Dulles Intl
18h 30m
1 stop
SOU4:35 pmSouthampton Eastleigh
$849
Aer Lingus
Oct 29
SOU9:20 amSouthampton Eastleigh
11h 15m
1 stop
IAD4:35 pmWashington, D.C. Dulles Intl
Nov 5
IAD9:00 pmWashington, D.C. Dulles Intl
17h 30m
1 stop
SOU7:30 pmSouthampton Eastleigh
$911

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
Jun 9
SOU9:20 amSouthampton Eastleigh
11h 25m
1 stop
IAD3:45 pmWashington, D.C. Dulles Intl
Jun 15
IAD9:00 pmWashington, D.C. Dulles Intl
14h 50m
1 stop
SOU4:50 pmSouthampton Eastleigh
$1,103
British Airways
Jun 9
SOU9:20 amSouthampton Eastleigh
11h 25m
1 stop
IAD3:45 pmWashington, D.C. Dulles Intl
Jun 15
IAD10:25 pmWashington, D.C. Dulles Intl
16h 05m
2 stops
SOU7:30 pmSouthampton Eastleigh
$1,111
British Airways
Aug 31
SOU7:55 pmSouthampton Eastleigh
25h 00m
2 stops
IAD3:55 pmWashington, D.C. Dulles Intl
Sep 10
IAD8:40 pmWashington, D.C. Dulles Intl
17h 50m
1 stop
SOU7:30 pmSouthampton Eastleigh
$1,136

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 May 12, 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

Sat 6/6

9:20 am-7:00 pm

1 stop14h 40m

Washington, D.C. Dulles Intl

Fri 6/12

9:00 pm-7:30 pm

1 stop17h 30m

$842

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 10/29

9:20 am-4:35 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 11/5

5:05 pm-4:35 pm

1 stop18h 30m

$849

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 10/29

9:20 am-4:35 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 11/5

9:00 pm-7:30 pm

1 stop17h 30m

$911
Quickest round-trip

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 10/29

9:20 am-4:35 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 11/5

9:45 pm-7:30 pm

2 stops16h 45m

$976

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 10/29

9:20 am-4:35 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 11/5

9:45 pm-7:30 pm

2 stops16h 45m

$978

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 6/12

6:25 pm-7:00 pm

2 stops29h 35m

Washington, D.C. Dulles Intl

Tue 6/16

5:15 pm-4:50 pm

1 stop18h 35m

$979

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Tue 6/9

9:20 am-3:03 pm

3 stops34h 43m

Washington, D.C. Dulles Intl

Mon 6/15

3:45 pm-7:30 pm

3 stops22h 45m

$986

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 10/29

9:20 am-4:35 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 11/5

9:45 pm-7:30 pm

2 stops16h 45m

$1,001

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Tue 6/9

9:20 am-8:29 pm

2 stops16h 09m

Washington, D.C. Dulles Intl

Mon 6/15

3:45 pm-4:50 pm

3 stops20h 05m

$1,016

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sat 6/6

9:20 am-7:00 pm

1 stop14h 40m

Washington, D.C. Dulles Intl

Fri 6/12

5:00 pm-7:30 pm

2 stops21h 30m

$1,027

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 $753. When flying out on a Sunday, 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 $858.

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 at noon is the least expensive time of day to depart. momondo users have found prices as low as $792 when looking at flights departing at noon. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $814 on average. Flights to Washington, D.C. Dulles Intl Airport from Southampton in the morning 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 15m

Direct flights

None
The fastest flight from Southampton to Washington, D.C. Dulles Intl Airport takes 11h 15m
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.
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Frequently asked questions about flying from Southampton to Washington, D.C. Dulles Intl Airport

  • 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 15m 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
Laurel
Gaithersburg
Colonial Beach
Fredericksburg
Silver Spring
Towson
Rockville
Manassas
Sterling
Linthicum Heights
Tysons
Bethesda
Springfield

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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