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Cheap flights from Southampton to Washington, D.C. from £392

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 5/9. 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

Discover deals from 900+ travel sites with momondo.

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

Cheap return flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
17:20 - 15:30SOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
27h 10m2 stops Dublin Madrid Barajas
Aer Lingus Logo
17:00 - 16:50IAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
18h 50m2 stops Madrid Barajas Dublin
£481Aer Lingus
Tue, 1 Sep - Mon, 7 Sep
Aer Lingus Logo
09:20 - 17:20SOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
36h 00m2 stops Dublin Madrid Barajas
Aer Lingus Logo
17:50 - 19:30IAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
20h 40m2 stops Madrid Barajas Dublin
£525Aer Lingus
Thu, 29 Oct - Thu, 5 Nov
Aer Lingus Logo
20:00 - 15:30SOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
24h 30m2 stops Dublin Madrid Barajas
Aer Lingus Logo
17:00 - 16:50IAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
18h 50m2 stops Madrid Barajas Dublin
£538Aer Lingus
Tue, 1 Sep - Mon, 7 Sep
Aer Lingus Logo
17:20 - 18:50SOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
30h 30m2 stops Dublin Madrid Barajas
Aer Lingus Logo
17:00 - 16:50IAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
18h 50m2 stops Madrid Barajas Dublin
£545Aer Lingus
Mon, 14 Sep - Fri, 25 Sep
Aer Lingus Logo
09:20 - 17:20SOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
36h 00m2 stops Dublin Madrid Barajas
Aer Lingus Logo
17:50 - 19:30IAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
20h 40m2 stops Madrid Barajas Dublin
£553Aer Lingus
Thu, 29 Oct - Thu, 5 Nov
Aer Lingus Logo
09:20 - 17:20SOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
36h 00m2 stops Dublin Madrid Barajas
Aer Lingus Logo
17:50 - 19:30IAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
20h 40m2 stops Madrid Barajas Dublin
£555Aer Lingus
Thu, 29 Oct - Thu, 5 Nov
Aer Lingus Logo
09:20 - 17:20SOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
36h 00m2 stops Dublin Madrid Barajas
Aer Lingus Logo
17:50 - 19:30IAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
20h 40m2 stops Madrid Barajas Dublin
£556Aer Lingus
Thu, 29 Oct - Thu, 5 Nov
Aer Lingus Logo
20:00 - 15:30SOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
24h 30m2 stops Dublin Madrid Barajas
Aer Lingus Logo
17:15 - 16:50IAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
18h 35m1 stop Dublin
£565Aer Lingus
Tue, 1 Sep - Mon, 7 Sep
Multiple Airlines Logo
09:20 - 17:20SOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
36h 00m2 stops Dublin Madrid Barajas
Multiple Airlines Logo
21:45 - 19:30IAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
16h 45m2 stops London Heathrow Dublin
£628Multiple Airlines
Thu, 29 Oct - Thu, 5 Nov
KLM Logo
09:05 - 15:35SOU  Southampton Eastleigh-IAD Washington, D.C. Dulles Intl
11h 30m1 stop Amsterdam Schiphol
KLM Logo
17:30 - 16:50IAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
18h 20m1 stop Amsterdam Schiphol
£637KLM
Mon, 14 Sep - Fri, 25 Sep

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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
6 Dec
SOU09:20Southampton Eastleigh
15h 10m
1 stop
IAD19:30Washington, D.C. Dulles Intl
19 Jan
IAD17:05Washington, D.C. Dulles Intl
10h 35m
1 stop
SOU08:40Southampton Eastleigh
£734
British Airways
4 Dec
SOU20:00Southampton Eastleigh
24h 35m
1 stop
IAD15:35Washington, D.C. Dulles Intl
21 Jan
IAD17:05Washington, D.C. Dulles Intl
18h 30m
1 stop
SOU16:35Southampton Eastleigh
£742
British Airways
17 Sept
SOU20:00Southampton Eastleigh
24h 45m
1 stop
IAD15:45Washington, D.C. Dulles Intl
20 Sept
IAD17:15Washington, D.C. Dulles Intl
10h 25m
1 stop
SOU08:40Southampton Eastleigh
£745

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
1 Sept
SOU17:20Southampton Eastleigh
27h 10m
2 stops
IAD15:30Washington, D.C. Dulles Intl
7 Sept
IAD17:00Washington, D.C. Dulles Intl
18h 50m
2 stops
SOU16:50Southampton Eastleigh
£481
Aer Lingus
29 Oct
SOU09:20Southampton Eastleigh
36h 00m
2 stops
IAD17:20Washington, D.C. Dulles Intl
5 Nov
IAD17:50Washington, D.C. Dulles Intl
20h 40m
2 stops
SOU19:30Southampton Eastleigh
£525
Aer Lingus
1 Sept
SOU20:00Southampton Eastleigh
24h 30m
2 stops
IAD15:30Washington, D.C. Dulles Intl
7 Sept
IAD17:00Washington, D.C. Dulles Intl
18h 50m
2 stops
SOU16:50Southampton Eastleigh
£538

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 9 August 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 return flight

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Tue 1/9

17:20-15:30

2 stops27h 10m

Washington, D.C. Dulles Intl

Mon 7/9

17:00-16:50

2 stops18h 50m

£481

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-17:20

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 5/11

17:50-19:30

2 stops20h 40m

£525

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Tue 1/9

20:00-15:30

2 stops24h 30m

Washington, D.C. Dulles Intl

Mon 7/9

17:00-16:50

2 stops18h 50m

£538

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Mon 14/9

17:20-18:50

2 stops30h 30m

Washington, D.C. Dulles Intl

Fri 25/9

17:00-16:50

2 stops18h 50m

£545

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-17:20

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 5/11

17:50-19:30

2 stops20h 40m

£553

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-17:20

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 5/11

17:50-19:30

2 stops20h 40m

£555

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-17:20

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 5/11

17:50-19:30

2 stops20h 40m

£556

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Tue 1/9

20:00-15:30

2 stops24h 30m

Washington, D.C. Dulles Intl

Mon 7/9

17:15-16:50

1 stop18h 35m

£565

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-17:20

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 5/11

21:45-19:30

2 stops16h 45m

£628
Fastest return journey

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Mon 14/9

09:05-15:35

1 stop11h 30m

Washington, D.C. Dulles Intl

Fri 25/9

17:30-16:50

1 stop18h 20m

£637

Flights are sorted by cheapest return 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?

According to our data, Friday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from Southampton. The lowest ticket price found for a Friday departure recently was £560. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Sunday is the most expensive day to depart from Southampton because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £605.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

The cheapest time of day to fly to Washington, D.C. Dulles Intl Airport is at midday when flights can be purchased for as low as £568. In contrast, the most expensive time of day to depart to Washington, D.C. Dulles Intl Airport is in the morning when prices are around £579.

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 return 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.
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?

    The distance between Southampton Eastleigh and Washington, D.C. Dulles Intl is about 3637.8 mi. By plane, this route typically takes 11h 15m.

  • 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 refresh daily.

  • How many operators does momondo search for flights from Southampton Eastleigh Airport to Washington, D.C. Dulles Intl Airport?

  • How old do you have to be to fly from Southampton Eastleigh Airport to Washington, D.C. Dulles Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 travel and health documents you'll need for your trip to Washington, D.C. Dulles Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Southampton to Washington, D.C. Dulles Intl Airport?

Best airlines flying from Southampton to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Southampton to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Aer LingusPriceFrom £449Free CancellationRating
7.3
1,693 reviews
Search Aer Lingus flights

Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
College Park
Springfield
Fairfax
Arlington
Gettysburg
Linthicum Heights
National Harbor
Winchester
Ellicott City
Cambridge
Glen Burnie
Westminster
Laurel
Lutherville Timonium
Lexington Park
Leesburg
Woodbridge
Bethesda
Sterling

Why use momondo?

Why should I use momondo to find a flight deal from Southampton to Washington, D.C.?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Southampton to Washington, D.C. for you.

Can I find flights from Southampton to Washington, D.C. with flexible booking policies on momondo?

momondo does allow users to show only those flights to Washington, D.C. from Southampton which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Southampton to Washington, D.C.?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Southampton to Washington, D.C..

I’m not ready to book a flight from Southampton to Washington, D.C. right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Southampton to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

An easier way to manage your Washington, D.C. Dulles Intl Airport trip

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