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Cheap flights from Southampton to Washington, D.C. from $542

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 9/13. 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.
Aer Lingus Logo
8:00 pm - 3:30 pmSOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
24h 30m2 stops Dublin Madrid Barajas
Aer Lingus Logo
5:00 pm - 4:50 pmIAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
18h 50m2 stops Madrid Barajas Dublin
$633Aer Lingus
Tue, Sep 1 - Mon, Sep 7
Aer Lingus Logo
5:20 pm - 3:30 pmSOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
27h 10m2 stops Dublin Madrid Barajas
Aer Lingus Logo
5:00 pm - 4:50 pmIAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
18h 50m2 stops Madrid Barajas Dublin
$649Aer Lingus
Tue, Sep 1 - Mon, Sep 7
Aer Lingus Logo
9:20 am - 5:20 pmSOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
36h 00m2 stops Dublin Madrid Barajas
Aer Lingus Logo
5:50 pm - 7:30 pmIAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
20h 40m2 stops Madrid Barajas Dublin
$749Aer Lingus
Thu, Oct 29 - Thu, Nov 5
Aer Lingus Logo
9:20 am - 5:20 pmSOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
36h 00m2 stops Dublin Madrid Barajas
Aer Lingus Logo
5:50 pm - 7:30 pmIAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
20h 40m2 stops Madrid Barajas Dublin
$750Aer Lingus
Thu, Oct 29 - Thu, Nov 5
Aer Lingus Logo
8:00 pm - 3:30 pmSOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
24h 30m2 stops Dublin Madrid Barajas
Aer Lingus Logo
5:15 pm - 4:50 pmIAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
18h 35m1 stop Dublin
$762Aer Lingus
Tue, Sep 1 - Mon, Sep 7
Aer Lingus Logo
8:00 pm - 3:30 pmSOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
24h 30m2 stops Dublin Madrid Barajas
Aer Lingus Logo
5:15 pm - 4:50 pmIAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
18h 35m1 stop Dublin
$764Aer Lingus
Tue, Sep 1 - Mon, Sep 7
Aer Lingus Logo
9:20 am - 5:20 pmSOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
36h 00m2 stops Dublin Madrid Barajas
Aer Lingus Logo
9:00 pm - 4:35 pmIAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
14h 35m1 stop Dublin
$771Aer Lingus
Thu, Oct 29 - Thu, Nov 5
Aer Lingus Logo
9:20 am - 5:20 pmSOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
36h 00m2 stops Dublin Madrid Barajas
Aer Lingus Logo
9:00 pm - 4:35 pmIAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
14h 35m1 stop Dublin
$772Aer Lingus
Thu, Oct 29 - Thu, Nov 5
Aer Lingus Logo
9:20 am - 5:20 pmSOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
36h 00m2 stops Dublin Madrid Barajas
Aer Lingus Logo
9:00 pm - 4:35 pmIAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
14h 35m1 stop Dublin
$795Aer Lingus
Thu, Oct 29 - Thu, Nov 5
Aer Lingus Logo
9:20 am - 4:35 pmSOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
11h 15m1 stop Dublin
Aer Lingus Logo
5:50 pm - 7:30 pmIAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
20h 40m2 stops Madrid Barajas Dublin
$815Aer Lingus
Thu, Oct 29 - Thu, Nov 5

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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 1
SOU8:00 pmSouthampton Eastleigh
24h 30m
2 stops
IAD3:30 pmWashington, D.C. Dulles Intl
Sep 7
IAD5:00 pmWashington, D.C. Dulles Intl
18h 50m
2 stops
SOU4:50 pmSouthampton Eastleigh
$633
Aer Lingus
Sep 1
SOU5:20 pmSouthampton Eastleigh
27h 10m
2 stops
IAD3:30 pmWashington, D.C. Dulles Intl
Sep 7
IAD5:00 pmWashington, D.C. Dulles Intl
18h 50m
2 stops
SOU4:50 pmSouthampton Eastleigh
$649
Aer Lingus
Oct 29
SOU9:20 amSouthampton Eastleigh
36h 00m
2 stops
IAD5:20 pmWashington, D.C. Dulles Intl
Nov 5
IAD5:50 pmWashington, D.C. Dulles Intl
20h 40m
2 stops
SOU7:30 pmSouthampton Eastleigh
$749

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
Dec 6
SOU9:20 amSouthampton Eastleigh
15h 10m
1 stop
IAD7:30 pmWashington, D.C. Dulles Intl
Jan 19
IAD5:05 pmWashington, D.C. Dulles Intl
10h 35m
1 stop
SOU8:40 amSouthampton Eastleigh
$991
British Airways
Oct 7
SOU9:20 amSouthampton Eastleigh
11h 25m
1 stop
IAD3:45 pmWashington, D.C. Dulles Intl
Oct 14
IAD5:15 pmWashington, D.C. Dulles Intl
18h 35m
1 stop
SOU4:50 pmSouthampton Eastleigh
$997
British Airways
Dec 4
SOU8:00 pmSouthampton Eastleigh
24h 35m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Jan 21
IAD5:05 pmWashington, D.C. Dulles Intl
18h 30m
1 stop
SOU4:35 pmSouthampton Eastleigh
$1,001

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 August 11, 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 Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Tue 9/1

8:00 pm-3:30 pm

2 stops24h 30m

Washington, D.C. Dulles Intl

Mon 9/7

5:00 pm-4:50 pm

2 stops18h 50m

$633

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Tue 9/1

5:20 pm-3:30 pm

2 stops27h 10m

Washington, D.C. Dulles Intl

Mon 9/7

5:00 pm-4:50 pm

2 stops18h 50m

$649

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Thu 10/29

9:20 am-5:20 pm

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 11/5

5:50 pm-7:30 pm

2 stops20h 40m

$749

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Thu 10/29

9:20 am-5:20 pm

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 11/5

5:50 pm-7:30 pm

2 stops20h 40m

$750

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Tue 9/1

8:00 pm-3:30 pm

2 stops24h 30m

Washington, D.C. Dulles Intl

Mon 9/7

5:15 pm-4:50 pm

1 stop18h 35m

$762

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Tue 9/1

8:00 pm-3:30 pm

2 stops24h 30m

Washington, D.C. Dulles Intl

Mon 9/7

5:15 pm-4:50 pm

1 stop18h 35m

$764

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Thu 10/29

9:20 am-5:20 pm

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 11/5

9:00 pm-4:35 pm

1 stop14h 35m

$771

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Thu 10/29

9:20 am-5:20 pm

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 11/5

9:00 pm-4:35 pm

1 stop14h 35m

$772

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Thu 10/29

9:20 am-5:20 pm

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 11/5

9:00 pm-4:35 pm

1 stop14h 35m

$795
Quickest round-trip

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Thu 10/29

9:20 am-4:35 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 11/5

5:50 pm-7:30 pm

2 stops20h 40m

$815

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 $741. 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 $862.

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 morning is the least expensive time of day to depart. momondo users have found prices as low as $784 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $805 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

16h 25m

Direct flights

None
The fastest flight from Southampton to Washington, D.C. Dulles Intl Airport takes 16h 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 16h 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
Linthicum Heights
Rockville
Silver Spring
Towson
Sterling
Colonial Beach
Springfield
Fairfax
Tysons
Edgewood

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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