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Cheap flights from Southampton to Washington, D.C. from $467

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 9/7. 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

Find the cheapest flights from Southampton to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
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
$680British Airways
Mon, Sep 7 - Mon, Sep 14
British Airways Logo
5:05 pm - 8:30 pm
SOU
-
IAD
31h 25m
1 stop
British Airways Logo
5:05 pm - 4:35 pm
IAD
-
SOU
18h 30m
1 stop
$683British Airways
Thu, Oct 29 - Thu, Nov 5
British Airways Logo
5:05 pm - 8:30 pm
SOU
-
IAD
31h 25m
1 stop
British Airways Logo
5:05 pm - 4:35 pm
IAD
-
SOU
18h 30m
1 stop
$685British Airways
Thu, Oct 29 - Thu, Nov 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
$686British Airways
Wed, Jul 15 - Wed, Jul 22
British Airways Logo
5:05 pm - 8:30 pm
SOU
-
IAD
31h 25m
1 stop
British Airways Logo
5:05 pm - 4:35 pm
IAD
-
SOU
18h 30m
1 stop
$687British Airways
Thu, Oct 29 - Thu, Nov 5
British Airways Logo
8:00 pm - 3:45 pm
SOU
-
IAD
24h 45m
1 stop
British Airways Logo
5:15 pm - 8:40 am
IAD
-
SOU
10h 25m
1 stop
$694British Airways
Wed, Jul 22 - Wed, Jul 29
British Airways Logo
8:00 pm - 3:45 pm
SOU
-
IAD
24h 45m
1 stop
British Airways Logo
9:05 pm - 7:30 pm
IAD
-
SOU
17h 25m
1 stop
$697British Airways
Fri, Aug 21 - Tue, Aug 25
British Airways Logo
8:00 pm - 7:10 pm
SOU
-
IAD
28h 10m
1 stop
British Airways Logo
5:15 pm - 4:50 pm
IAD
-
SOU
18h 35m
1 stop
$699British Airways
Fri, Aug 21 - Tue, Aug 25
British Airways Logo
8:00 pm - 3:45 pm
SOU
-
IAD
24h 45m
1 stop
British Airways Logo
9:05 pm - 7:30 pm
IAD
-
SOU
17h 25m
1 stop
$701British Airways
Fri, Aug 21 - Tue, Aug 25
British Airways Logo
9:20 am - 7:10 pm
SOU
-
IAD
14h 50m
1 stop
British Airways Logo
5:15 pm - 8:40 am
IAD
-
SOU
10h 25m
1 stop
$728British Airways
Thu, Aug 27 - Mon, Aug 31

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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
Oct 29
SOU8:40 amSouthampton Eastleigh
12h 05m
1 stop
IAD4:45 pmWashington, D.C. Dulles Intl
Nov 5
IAD1:00 pmWashington, D.C. Dulles Intl
14h 10m
2 stops
SOU8:10 amSouthampton Eastleigh
$734
KLM
Oct 29
SOU8:40 amSouthampton Eastleigh
18h 22m
2 stops
IAD11:02 pmWashington, D.C. Dulles Intl
Nov 5
IAD1:00 pmWashington, D.C. Dulles Intl
14h 10m
2 stops
SOU8:10 amSouthampton Eastleigh
$739
KLM
Oct 29
SOU5:30 pmSouthampton Eastleigh
26h 47m
2 stops
IAD4:17 pmWashington, D.C. Dulles Intl
Nov 5
IAD1:00 pmWashington, D.C. Dulles Intl
14h 10m
2 stops
SOU8:10 amSouthampton Eastleigh
$754

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
Sep 7
SOU9:20 amSouthampton Eastleigh
11h 25m
1 stop
IAD3:45 pmWashington, D.C. Dulles Intl
Sep 14
IAD5:15 pmWashington, D.C. Dulles Intl
10h 25m
1 stop
SOU8:40 amSouthampton Eastleigh
$680
British Airways
Oct 29
SOU5:05 pmSouthampton Eastleigh
31h 25m
1 stop
IAD8:30 pmWashington, D.C. Dulles Intl
Nov 5
IAD5:05 pmWashington, D.C. Dulles Intl
18h 30m
1 stop
SOU4:35 pmSouthampton Eastleigh
$683
British Airways
Oct 29
SOU5:05 pmSouthampton Eastleigh
31h 25m
1 stop
IAD8:30 pmWashington, D.C. Dulles Intl
Nov 5
IAD5:05 pmWashington, D.C. Dulles Intl
18h 30m
1 stop
SOU4:35 pmSouthampton Eastleigh
$685

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 June 27, 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
Quickest round-trip

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 9/7

9:20 am-3:45 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

Mon 9/14

5:15 pm-8:40 am

1 stop10h 25m

$680

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 10/29

5:05 pm-8:30 pm

1 stop31h 25m

Washington, D.C. Dulles Intl

Thu 11/5

5:05 pm-4:35 pm

1 stop18h 30m

$683

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 10/29

5:05 pm-8:30 pm

1 stop31h 25m

Washington, D.C. Dulles Intl

Thu 11/5

5:05 pm-4:35 pm

1 stop18h 30m

$685

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 7/15

9:20 am-3:45 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

Wed 7/22

5:15 pm-8:40 am

1 stop10h 25m

$686

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 10/29

5:05 pm-8:30 pm

1 stop31h 25m

Washington, D.C. Dulles Intl

Thu 11/5

5:05 pm-4:35 pm

1 stop18h 30m

$687

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 7/22

8:00 pm-3:45 pm

1 stop24h 45m

Washington, D.C. Dulles Intl

Wed 7/29

5:15 pm-8:40 am

1 stop10h 25m

$694

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 8/21

8:00 pm-3:45 pm

1 stop24h 45m

Washington, D.C. Dulles Intl

Tue 8/25

9:05 pm-7:30 pm

1 stop17h 25m

$697

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 8/21

8:00 pm-7:10 pm

1 stop28h 10m

Washington, D.C. Dulles Intl

Tue 8/25

5:15 pm-4:50 pm

1 stop18h 35m

$699

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 8/21

8:00 pm-3:45 pm

1 stop24h 45m

Washington, D.C. Dulles Intl

Tue 8/25

9:05 pm-7:30 pm

1 stop17h 25m

$701

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 8/27

9:20 am-7:10 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Mon 8/31

5:15 pm-8:40 am

1 stop10h 25m

$728

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 $750. 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 $897.

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 $796 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $808 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 25m

Direct flights

None
The fastest flight from Southampton to Washington, D.C. Dulles Intl Airport takes 11h 25m
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

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 25m 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
Arlington
Gettysburg
Winchester
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Colonial Beach
Linthicum Heights
Rockville
Silver Spring
Towson
Manassas
Sterling
Tysons
Springfield
Fairfax

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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