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Cheap flights from Southampton to Washington, D.C. from £440

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/5. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — WAS
2 Mar — 9 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Southampton to Washington, D.C.

Enter your travel dates to find the best prices.

Cheapest flights from Southampton to Washington, D.C.
Explore the most affordable flight options available from Southampton to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 January 2026.

Fri 27/220:10
SOU
-
IAD
1 stop24h 10m
Multiple Airlines
Tue 3/317:40
IAD
-
SOU
2 stops13h 15m
Multiple Airlines
Deal found 30/1£715
Sun 15/317:45
SOU
-
IAD
1 stop27h 20m
KLM
Sun 22/319:05
IAD
-
SOU
1 stop18h 00m
KLM
Deal found 29/1£741
Fri 27/208:50
SOU
-
IAD
2 stops16h 55m
Delta
Tue 3/312:35
IAD
-
SOU
2 stops14h 45m
Delta
Deal found 30/1£749
Sun 15/309:30
SOU
-
DCA
2 stops17h 06m
Delta
Sun 22/306:14
DCA
-
SOU
2 stops22h 06m
Delta
Deal found 29/1£778
Fri 27/217:35
SOU
-
DCA
2 stops27h 52m
KLM
Tue 3/317:00
DCA
-
SOU
2 stops19h 00m
KLM
Deal found 30/1£784
Sun 15/320:10
SOU
-
IAD
2 stops28h 45m
Aer Lingus
Sun 22/322:45
IAD
-
SOU
2 stops16h 55m
Aer Lingus
Deal found 29/1£817
Wed 4/312:25
SOU
-
IAD
1 stop12h 05m
British Airways
Sun 8/322:00
IAD
-
SOU
1 stop17h 40m
British Airways
Deal found 30/1£834
Fri 27/208:00
SOU
-
BWI
3 stops19h 53m
Multiple Airlines
Tue 3/319:40
BWI
-
SOU
2 stops16h 50m
Multiple Airlines
Deal found 30/1£866
Fri 27/206:50
SOU
-
BWI
2 stops16h 55m
British Airways
Tue 3/320:35
BWI
-
SOU
2 stops19h 25m
British Airways
Deal found 30/1£894
Sun 15/320:10
SOU
-
BWI
3 stops31h 49m
Multiple Airlines
Sun 22/310:04
BWI
-
SOU
3 stops29h 36m
Multiple Airlines
Deal found 29/1£964
Sun 15/309:30
SOU
-
DCA
2 stops17h 05m
Multiple Airlines
Sun 22/316:10
DCA
-
SOU
3 stops21h 20m
Multiple Airlines
Deal found 29/1£1,701
Sun 15/309:30
SOU
-
BWI
2 stops17h 31m
Delta
Sun 22/315:35
BWI
-
SOU
2 stops21h 30m
Delta
Deal found 29/1£3,283

Find flight deals from Southampton to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Southampton (SOU) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 31 January 2026.

Round-trip from

£715

One-way from

£440

Popular in

July

Cheapest in

February

Average price

£468
27/2-3/3
  • 27/2-3/3
  • 3 total stops
  • 37h 25m total
  • Southampton to Washington, D.C.
Search Deals
28/5
  • 28/5
  • 2 total stops
  • 15h 15m total
  • Southampton to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£55 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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Cheapflights 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, Cheapflights users made 858,174 searches. Data last updated 31 January 2026.
Use the filters below to find and compare flights from Southampton to Washington, D.C. that are best for you.

Fly from

Southampton

Fly to

Washington, D.C.

Route

Depart

Return

Price

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 27/2

20:10-15:20

1 stop24h 10m

Washington, D.C. Dulles Intl

Tue 3/3

17:40-11:55

2 stops13h 15m

£715

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 15/3

17:45-17:05

1 stop27h 20m

Washington, D.C. Dulles Intl

Sun 22/3

19:05-17:05

1 stop18h 00m

£741

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Sun 15/3

09:30-22:36

2 stops17h 06m

Washington, D.C. Reagan-National

Sun 22/3

06:14-08:20

2 stops22h 06m

£778

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Fri 27/2

17:35-16:27

2 stops27h 52m

Washington, D.C. Reagan-National

Tue 3/3

17:00-17:00

2 stops19h 00m

£784

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 4/3

12:25-19:30

1 stop12h 05m

Washington, D.C. Dulles Intl

Sun 8/3

22:00-19:40

1 stop17h 40m

£834

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Fri 27/2

08:00-22:53

3 stops19h 53m

Baltimore/Washington

Tue 3/3

19:40-17:30

2 stops16h 50m

£866

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Fri 27/2

06:50-18:45

2 stops16h 55m

Baltimore/Washington

Tue 3/3

20:35-21:00

2 stops19h 25m

£894

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Sun 15/3

20:10-23:59

3 stops31h 49m

Baltimore/Washington

Sun 22/3

10:04-19:40

3 stops29h 36m

£964

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Sun 15/3

09:30-22:35

2 stops17h 05m

Washington, D.C. Reagan-National

Sun 22/3

16:10-17:30

3 stops21h 20m

£1,701

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Sun 15/3

09:30-23:01

2 stops17h 31m

Baltimore/Washington

Sun 22/3

15:35-17:05

2 stops21h 30m

£3,283

Flights are sorted by cheapest return flights first.

Deals found on 30/1

Showing 1-10 of 30 results
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Best time to book a flight from Southampton to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Southampton with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Southampton to Washington, D.C.

What is the cheapest month to book a flight from Southampton to Washington, D.C.?

Currently, February is the cheapest month in which you can book a flight from Southampton to Washington, D.C. (average of £222). Flying from Southampton to Washington, D.C. in June is currently the most expensive (average of £458). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What’s the top stopover airport for flights from Southampton to Washington, D.C.?

Share of one-stop return flights from Southampton to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Dublin (DUB) – chosen by Cheapflights users on 77% of one-stop itineraries from Southampton to Washington, D.C. on Cheapflights.

What’s the cheapest stopover airport for flights from Southampton to Washington, D.C.?

Average return fare for one-stop flights from Southampton to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Dublin (DUB) is the most affordable one-stop option, with an average return flight price of £615.

What’s the fastest stopover option from Southampton to Washington, D.C.?

Shortest average travel time for one-stop one-way flights from Southampton to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 11h 10m.

Which airport typically offers the quickest stopover for flights from Southampton to Washington, D.C.?

Average stopover duration for one-stop one-way flights from Southampton to Washington, D.C., chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 28m.

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated 31 January 2026.
Read reviews from past customers who have flown with Aer Lingus from Southampton to Washington, D.C.. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,444 reviews
Check prices

Entertainment

6.9

Boarding

7.4

Overall

7.2

Crew

8.0

Food

6.6

Comfort

7.1

Reviews

1 / 20
6.0
Good

Anonymous,Dec 2025

MAN - DUB

They did not list a gate until it was time to board.
Aer Lingus
7.2
Good
1,444 reviews
Aer Lingus
7.2
Good
1,444 reviews
Check prices

Entertainment

6.9

Boarding

7.4

Overall

7.2

Crew

8.0

Food

6.6

Comfort

7.1

Reviews

1 / 20
6.0
Good

Anonymous,Dec 2025

MAN - DUB

They did not list a gate until it was time to board.

Related info for your journey

Find useful and relevant information for your journey from Southampton to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Southampton to Washington, D.C.?

    Southampton Eastleigh (SOU) is the airport you will fly out of if you book a flight from Southampton to Washington, D.C.. You should not have trouble finding flights to Washington, D.C. from Eastleigh; the airport handles an average of 0 outbound flights to Washington, D.C. per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Southampton airport to Washington, D.C.. It is only a 3.5 mi journey to Eastleigh (SOU) from Southampton’s city center.

  • How long is the flight from Southampton to Washington, D.C.?

    For as low as £834, KLM can have you in Washington, D.C. from Southampton in 12h 05m. The distance from Southampton to Washington, D.C. is about 3639 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most popular routes from Southampton to Washington, D.C.?

    The most popular route from Southampton to Washington, D.C. is Southampton Eastleigh - Washington, D.C. Dulles Intl. You may also consider Southampton Eastleigh - Washington, D.C. Reagan-National or Southampton Eastleigh - Baltimore/Washington.

  • Can I find deals for flights from Southampton to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Southampton to Washington, D.C. flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Southampton to Washington, D.C.?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Southampton to Washington, D.C..

  • Can I find deals for business class flights from Southampton to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Southampton to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Southampton to Washington, D.C.?

    Currently, February is the cheapest month in which you can book a flight from Southampton to Washington, D.C. (average of £222). Flying from Southampton to Washington, D.C. in June is currently the most expensive (average of £458). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Woodbridge
Arlington
Alexandria
College Park

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Alternative routes for Southampton to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Dulles Intl flights
Heathrow to Reagan-National flights
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Gatwick to Reagan-National flights
Luton to Dulles Intl flights
Manchester to Dulles Intl flights
Manchester to Reagan-National flights
Edinburgh to Dulles Intl flights
Birmingham to Dulles Intl flights
Birmingham to Reagan-National flights
Edinburgh to Reagan-National flights
Newcastle upon Tyne to Dulles Intl flights
Leeds to Dulles Intl flights
Newcastle upon Tyne to Reagan-National flights
Bristol to Dulles Intl flights
Southampton to Dulles Intl flights
London City to Reagan-National flights
Exeter to Dulles Intl flights
Southampton to Reagan-National flights
Norwich to Reagan-National flights
Leeds to Reagan-National flights
Grimsby to Dulles Intl flights
Bristol to Reagan-National flights
Doncaster to Dulles Intl flights
Norwich to Dulles Intl flights
Southend to Dulles Intl flights
Grimsby to Reagan-National flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Southampton to Washington, D.C.?

Deals for Southampton to Washington, D.C. flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Southampton to Washington, D.C.?

Cheapflights helps you find that perfect flight to Washington, D.C. from Southampton by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Southampton to Washington, D.C. with no change fees?

Yes, we can. To see specific flights from Southampton to Washington, D.C. with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Southampton to Washington, D.C. become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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