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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
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
£469Aer Lingus
Tue, 1 Sep - Mon, 7 Sep
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
£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
£555Aer 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
£564Aer Lingus
Tue, 1 Sep - Mon, 7 Sep
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
£566Aer 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
21:00 - 16:35IAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
14h 35m1 stop Dublin
£571Aer 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
21:00 - 16:35IAD  Washington, D.C. Dulles Intl-SOU Southampton Eastleigh
14h 35m1 stop Dublin
£572Aer Lingus
Thu, 29 Oct - Thu, 5 Nov
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
£627Multiple Airlines
Thu, 29 Oct - Thu, 5 Nov
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
£635Multiple Airlines
Thu, 29 Oct - Thu, 5 Nov

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Delta flights from Southampton to Washington, D.C.

Our best Delta deals on Southampton to Washington, D.C. flight tickets
Delta
29 Oct
SOU08:40Southampton Eastleigh
12h 05m
1 stop
IAD16:45Washington, D.C. Dulles Intl
5 Nov
IAD17:45Washington, D.C. Dulles Intl
9h 25m
1 stop
SOU08:10Southampton Eastleigh
£655
Delta
29 Oct
SOU08:40Southampton Eastleigh
18h 24m
2 stops
BWI23:04Baltimore/Washington
5 Nov
BWI06:10Baltimore/Washington
21h 00m
2 stops
SOU08:10Southampton Eastleigh
£657
Delta
29 Oct
SOU08:40Southampton Eastleigh
18h 24m
2 stops
BWI23:04Baltimore/Washington
5 Nov
BWI06:10Baltimore/Washington
21h 00m
2 stops
SOU08:10Southampton Eastleigh
£658

British Airways flights from Southampton to Washington, D.C.

Our best British Airways deals on Southampton to Washington, D.C. 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
7 Oct
SOU09:20Southampton Eastleigh
11h 25m
1 stop
IAD15:45Washington, D.C. Dulles Intl
14 Oct
IAD17:15Washington, D.C. Dulles Intl
18h 35m
1 stop
SOU16:50Southampton Eastleigh
£738
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
£741

momondo Fare Finder

 
Customise your flight search to find flights from Southampton to Washington, D.C. 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 11 August 2026.
Use the filters below to find and compare flights from Southampton to Washington, D.C. 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

20:00-15:30

2 stops24h 30m

Washington, D.C. Dulles Intl

Mon 7/9

17:00-16:50

2 stops18h 50m

£469

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

£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

£555
Fastest return journey

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

£564

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

£566

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

21:00-16:35

1 stop14h 35m

£571

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

21:00-16:35

1 stop14h 35m

£572

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

£627

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

£635

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.

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.?

On average, the least expensive day to fly to Washington, D.C. from Southampton is on a Friday. momondo users have found tickets for Friday departures for as low as £560. However, this price may fluctuate depending on the airline, the season, and holidays. 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.?

At midday is the cheapest time of day to fly from Southampton to Washington, D.C. when you can find flight prices for as low as £567. Flying to Washington, D.C. at midday is an ideal time because this is during off-peak travel hours. Flights to Washington, D.C. are more costly in the morning, with an average ticket price of £578. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from Southampton to Washington, D.C.

Are you open to changing your travel dates? Check out the ideal times to fly from Southampton to Washington, D.C. according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Southampton to Washington, D.C. (SOU to WAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Southampton to Washington, D.C.

Fastest flight time

16h 25m

Direct flights

None
The fastest flight from Southampton to Washington, D.C. takes 16h 25m
There are no direct flights from Southampton to Washington, D.C.. There are no popular flight routes from Southampton to Washington, D.C..
Search flight deals

Frequently asked questions about flying from Southampton to Washington, D.C.

  • How far is Southampton Eastleigh to Washington, D.C. by plane?

    Washington, D.C. is 3622.6 mi away from Southampton Eastleigh. 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.?

    Prices for flights from Southampton Eastleigh Airport to Washington, D.C. are refreshed on a daily basis.

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

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

    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..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The necessary travel and health documents for your Washington, D.C. 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.

Best airlines flying from Southampton to Washington, D.C.

Compare and see reviews for airlines that fly from Southampton to Washington, D.C. 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
Ellicott City
Cambridge
Glen Burnie
Westminster
Laurel
Lutherville Timonium
Lexington Park
Woodbridge
Bethesda
Silver Spring
Rockville
Landover

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Southampton to Washington, D.C. . Millions of users trust and use momondo every year so you are in good hands.

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

Flights from Southampton to Washington, D.C. with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington, D.C. from Southampton.

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. trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport