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Cheap flights from Southampton to Washington, D.C. from $660

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 9/1. 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

Aer Lingus Logo
9:40 am - 6:55 pmSOU-IAD
14h 15m1 stop
Aer Lingus Logo
5:20 pm - 8:40 amIAD-SOU
10h 20m1 stop
$755Aer Lingus
Find Deal
Fri, Sep 12 - Fri, Sep 19
Aer Lingus Logo
9:40 am - 3:50 pmSOU-IAD
11h 10m1 stop
Aer Lingus Logo
5:20 pm - 8:40 amIAD-SOU
10h 20m1 stop
$837Aer Lingus
Find Deal
Thu, Aug 28 - Wed, Sep 3
KLM Logo
9:20 am - 3:35 pmSOU-IAD
11h 15m1 stop
KLM Logo
5:25 pm - 8:45 amIAD-SOU
10h 20m1 stop
$851KLM
Find Deal
Fri, Sep 12 - Fri, Sep 19
Logo
9:40 am - 10:10 pmSOU-IAD
17h 30m2 stops
Logo
8:30 pm - 7:30 pmIAD-SOU
18h 00m2 stops
$853
Find Deal
Thu, Aug 28 - Wed, Sep 3
KLM Logo
9:20 am - 7:37 pmSOU-IAD
15h 17m2 stops
KLM Logo
5:25 pm - 8:45 amIAD-SOU
10h 20m1 stop
$857KLM
Find Deal
Fri, Sep 12 - Fri, Sep 19
Virgin Atlantic Logo
9:20 am - 1:53 pmSOU-IAD
33h 33m2 stops
Virgin Atlantic Logo
8:17 pm - 8:45 amIAD-SOU
55h 28m2 stops
$869Virgin Atlantic
Find Deal
Fri, Sep 12 - Fri, Sep 19
Logo
9:20 am - 3:20 pmSOU-IAD
35h 00m3 stops
Logo
5:50 pm - 8:15 pmIAD-SOU
21h 25m3 stops
$875
Find Deal
Thu, Aug 28 - Wed, Sep 3
Logo
8:15 pm - 6:55 pmSOU-IAD
27h 40m2 stops
Logo
5:20 pm - 5:30 pmIAD-SOU
19h 10m2 stops
$884
Find Deal
Fri, Sep 12 - Fri, Sep 19
KLM Logo
5:35 pm - 3:35 pmSOU-IAD
27h 00m1 stop
KLM Logo
5:25 pm - 5:00 pmIAD-SOU
18h 35m1 stop
$930KLM
Find Deal
Thu, Aug 28 - Wed, Sep 3
Delta Logo
9:20 am - 3:35 pmSOU-IAD
11h 15m1 stop
Delta Logo
6:15 pm - 5:00 pmIAD-SOU
17h 45m2 stops
$977Delta
Find Deal
Thu, Aug 28 - Wed, Sep 3

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
Sep 12
SOU9:40 amSouthampton Eastleigh
14h 15m
1 stop
IAD6:55 pmWashington, D.C. Dulles Intl
Sep 19
IAD5:20 pmWashington, D.C. Dulles Intl
10h 20m
1 stop
SOU8:40 amSouthampton Eastleigh
$755
Find similar
Aer Lingus
Aug 28
SOU9:40 amSouthampton Eastleigh
11h 10m
1 stop
IAD3:50 pmWashington, D.C. Dulles Intl
Sep 3
IAD5:20 pmWashington, D.C. Dulles Intl
10h 20m
1 stop
SOU8:40 amSouthampton Eastleigh
$837
Find similar

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

Our best KLM deals on Southampton to Washington, D.C. Dulles Intl Airport flight tickets
KLM
Sep 12
SOU9:20 amSouthampton Eastleigh
11h 15m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Sep 19
IAD5:25 pmWashington, D.C. Dulles Intl
10h 20m
1 stop
SOU8:45 amSouthampton Eastleigh
$851
Find similar
KLM
Sep 12
SOU9:20 amSouthampton Eastleigh
15h 17m
2 stops
IAD7:37 pmWashington, D.C. Dulles Intl
Sep 19
IAD5:25 pmWashington, D.C. Dulles Intl
10h 20m
1 stop
SOU8:45 amSouthampton Eastleigh
$857
Find similar
KLM
Aug 28
SOU5:35 pmSouthampton Eastleigh
27h 00m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Sep 3
IAD5:25 pmWashington, D.C. Dulles Intl
18h 35m
1 stop
SOU5:00 pmSouthampton Eastleigh
$930
Find similar

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 July 31, 2025.
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 9/12

9:40 am-6:55 pm

1 stop14h 15m

Washington, D.C. Dulles Intl

Fri 9/19

5:20 pm-8:40 am

1 stop10h 20m

$755

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 8/28

9:40 am-3:50 pm

1 stop11h 10m

Washington, D.C. Dulles Intl

Wed 9/3

5:20 pm-8:40 am

1 stop10h 20m

$837

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 9/12

9:20 am-3:35 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Fri 9/19

5:25 pm-8:45 am

1 stop10h 20m

$851

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 8/28

9:40 am-10:10 pm

2 stops17h 30m

Washington, D.C. Dulles Intl

Wed 9/3

8:30 pm-7:30 pm

2 stops18h 00m

$853

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 9/12

9:20 am-7:37 pm

2 stops15h 17m

Washington, D.C. Dulles Intl

Fri 9/19

5:25 pm-8:45 am

1 stop10h 20m

$857

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 9/12

9:20 am-1:53 pm

2 stops33h 33m

Washington, D.C. Dulles Intl

Fri 9/19

8:17 pm-8:45 am

2 stops55h 28m

$869

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 8/28

9:20 am-3:20 pm

3 stops35h 00m

Washington, D.C. Dulles Intl

Wed 9/3

5:50 pm-8:15 pm

3 stops21h 25m

$875

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 9/12

8:15 pm-6:55 pm

2 stops27h 40m

Washington, D.C. Dulles Intl

Fri 9/19

5:20 pm-5:30 pm

2 stops19h 10m

$884

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 8/28

5:35 pm-3:35 pm

1 stop27h 00m

Washington, D.C. Dulles Intl

Wed 9/3

5:25 pm-5:00 pm

1 stop18h 35m

$930

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 8/28

9:20 am-3:35 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Wed 9/3

6:15 pm-5:00 pm

2 stops17h 45m

$977

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 $826. 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 $939.

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 evening is the least expensive time of day to depart. momondo users have found prices as low as $743 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $880 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

Best Price Found

$660

Fastest flight time

11h 10m

Direct flights

None
The best one-way flight to Washington, D.C. Dulles Intl Airport from Southampton in the past 72 hours is $660. The best round-trip flight deal from Southampton to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $755.
The fastest flight from Southampton to Washington, D.C. Dulles Intl Airport takes 11h 10m
There are no direct flights from Southampton to Washington, D.C. Dulles Intl Airport. Popular non-direct route for this connection is Southampton Eastleigh Airport - 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 10m 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
Gettysburg
Arlington
National Harbor
Winchester
Woodbridge
Laurel
Tysons
Silver Spring
Waldorf
Fredericksburg
Manassas
Harpers Ferry
Towson
Rockville
Colonial Beach
Gaithersburg
Fairfax
Reston
Glen Burnie

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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