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Cheap flights from Southampton to Washington, D.C. from £433

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 22/8. 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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0 bags

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Cheap return flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
09:20 - 19:00
SOU
-
IAD
14h 40m
1 stop
Aer Lingus Logo
21:00 - 19:30
IAD
-
SOU
17h 30m
1 stop
£618Aer Lingus
Sat, 6 Jun - Fri, 12 Jun
Aer Lingus Logo
09:20 - 20:30
SOU
-
IAD
15h 10m
1 stop
Aer Lingus Logo
21:00 - 16:35
IAD
-
SOU
14h 35m
1 stop
£666Aer Lingus
Thu, 29 Oct - Thu, 5 Nov
Aer Lingus Logo
09:20 - 16:35
SOU
-
IAD
11h 15m
1 stop
Aer Lingus Logo
21:00 - 19:30
IAD
-
SOU
17h 30m
1 stop
£668Aer Lingus
Thu, 29 Oct - Thu, 5 Nov
Multiple Airlines Logo
09:20 - 16:35
SOU
-
IAD
11h 15m
1 stop
Multiple Airlines Logo
21:45 - 19:30
IAD
-
SOU
16h 45m
2 stops
£716Multiple Airlines
Thu, 29 Oct - Thu, 5 Nov
Multiple Airlines Logo
18:25 - 19:00
SOU
-
IAD
29h 35m
2 stops
Multiple Airlines Logo
17:15 - 16:50
IAD
-
SOU
18h 35m
1 stop
£718Multiple Airlines
Fri, 12 Jun - Tue, 16 Jun
Multiple Airlines Logo
09:20 - 16:35
SOU
-
IAD
11h 15m
1 stop
Multiple Airlines Logo
21:00 - 17:40
IAD
-
SOU
15h 40m
2 stops
£732Multiple Airlines
Thu, 29 Oct - Thu, 5 Nov
Multiple Airlines Logo
09:20 - 16:35
SOU
-
IAD
11h 15m
1 stop
Multiple Airlines Logo
21:45 - 19:30
IAD
-
SOU
16h 45m
2 stops
£734Multiple Airlines
Thu, 29 Oct - Thu, 5 Nov
Aer Lingus Logo
09:20 - 19:00
SOU
-
IAD
14h 40m
1 stop
Aer Lingus Logo
17:00 - 19:30
IAD
-
SOU
21h 30m
2 stops
£753Aer Lingus
Sat, 6 Jun - Fri, 12 Jun
Aer Lingus Logo
20:00 - 15:30
SOU
-
IAD
24h 30m
2 stops
Aer Lingus Logo
17:15 - 08:35
IAD
-
SOU
10h 20m
1 stop
£764Aer Lingus
Sat, 20 Jun - Sat, 27 Jun
Multiple Airlines Logo
18:25 - 19:00
SOU
-
IAD
29h 35m
2 stops
Multiple Airlines Logo
17:15 - 08:35
IAD
-
SOU
34h 20m
2 stops
£785Multiple Airlines
Fri, 12 Jun - Tue, 16 Jun

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
6 Jun
SOU09:20Southampton Eastleigh
14h 40m
1 stop
IAD19:00Washington, D.C. Dulles Intl
12 Jun
IAD21:00Washington, D.C. Dulles Intl
17h 30m
1 stop
SOU19:30Southampton Eastleigh
£618
Aer Lingus
29 Oct
SOU09:20Southampton Eastleigh
15h 10m
1 stop
IAD20:30Washington, D.C. Dulles Intl
5 Nov
IAD21:00Washington, D.C. Dulles Intl
14h 35m
1 stop
SOU16:35Southampton Eastleigh
£666
Aer Lingus
29 Oct
SOU09:20Southampton Eastleigh
11h 15m
1 stop
IAD16:35Washington, D.C. Dulles Intl
5 Nov
IAD21:00Washington, D.C. Dulles Intl
17h 30m
1 stop
SOU19:30Southampton Eastleigh
£668

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
16 Sept
SOU09:20Southampton Eastleigh
15h 05m
1 stop
IAD19:25Washington, D.C. Dulles Intl
30 Sept
IAD20:55Washington, D.C. Dulles Intl
14h 55m
1 stop
SOU16:50Southampton Eastleigh
£823
British Airways
16 Sept
SOU09:20Southampton Eastleigh
11h 25m
1 stop
IAD15:45Washington, D.C. Dulles Intl
30 Sept
IAD17:45Washington, D.C. Dulles Intl
16h 00m
2 stops
SOU14:45Southampton Eastleigh
£833
British Airways
16 Sept
SOU08:55Southampton Eastleigh
16h 25m
2 stops
IAD20:20Washington, D.C. Dulles Intl
30 Sept
IAD17:45Washington, D.C. Dulles Intl
16h 00m
2 stops
SOU14:45Southampton Eastleigh
£862

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 10 May 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 - IAD

SOUIAD

Southampton Eastleigh

Sat 6/6

09:20-19:00

1 stop14h 40m

Washington, D.C. Dulles Intl

Fri 12/6

21:00-19:30

1 stop17h 30m

£618

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-20:30

1 stop15h 10m

Washington, D.C. Dulles Intl

Thu 5/11

21:00-16:35

1 stop14h 35m

£666

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-16:35

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 5/11

21:00-19:30

1 stop17h 30m

£668

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-16:35

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 5/11

21:45-19:30

2 stops16h 45m

£716

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 12/6

18:25-19:00

2 stops29h 35m

Washington, D.C. Dulles Intl

Tue 16/6

17:15-16:50

1 stop18h 35m

£718
Fastest return journey

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-16:35

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 5/11

21:00-17:40

2 stops15h 40m

£732

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-16:35

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 5/11

21:45-19:30

2 stops16h 45m

£734

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sat 6/6

09:20-19:00

1 stop14h 40m

Washington, D.C. Dulles Intl

Fri 12/6

17:00-19:30

2 stops21h 30m

£753

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sat 20/6

20:00-15:30

2 stops24h 30m

Washington, D.C. Dulles Intl

Sat 27/6

17:15-08:35

1 stop10h 20m

£764

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 12/6

18:25-19:00

2 stops29h 35m

Washington, D.C. Dulles Intl

Tue 16/6

17:15-08:35

2 stops34h 20m

£785

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, Wednesday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from Southampton. The lowest ticket price found for a Wednesday departure recently was £561. 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 £602.

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 £551. 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 £578.

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 £445Free CancellationRating
7.3
1,551 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
Fairfax
Springfield
Arlington
Gettysburg
Linthicum Heights
Front Royal
Glen Burnie
Winchester
Laurel
Ellicott City
Lutherville Timonium
Cambridge
Westminster
Lexington Park
Leesburg
Ashburn
Sterling
Woodbridge

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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