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Cheap flights from Southampton to Washington, D.C. from £475

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 14/7. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — WAS
8 Jun — 15 Jun1
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 9 May 2026.

Sat 6/609:20
SOU
-
IAD
1 stop14h 40m
Aer Lingus
Fri 12/621:00
IAD
-
SOU
1 stop17h 30m
Aer Lingus
Deal found 8/5£619
Thu 29/1009:20
SOU
-
IAD
1 stop15h 10m
Aer Lingus
Thu 5/1121:00
IAD
-
SOU
1 stop17h 30m
Aer Lingus
Deal found 5/5£667
Thu 29/1009:20
SOU
-
IAD
1 stop15h 10m
Multiple Airlines
Thu 5/1118:20
IAD
-
SOU
2 stops17h 15m
Multiple Airlines
Deal found 8/5£717
Fri 12/618:25
SOU
-
IAD
2 stops29h 35m
Multiple Airlines
Tue 16/617:15
IAD
-
SOU
1 stop18h 35m
Multiple Airlines
Deal found 7/5£720
Thu 18/609:20
SOU
-
IAD
1 stop14h 40m
Aer Lingus
Thu 25/620:45
IAD
-
SOU
1 stop17h 45m
Aer Lingus
Deal found 4/5£735
Sat 6/609:20
SOU
-
DCA
2 stops18h 08m
Multiple Airlines
Fri 12/618:55
DCA
-
SOU
2 stops19h 35m
Multiple Airlines
Deal found 8/5£765
Sat 20/620:00
SOU
-
IAD
2 stops24h 30m
Aer Lingus
Sat 27/617:15
IAD
-
SOU
1 stop10h 20m
Aer Lingus
Deal found 6/5£766
Thu 29/1020:00
SOU
-
BWI
2 stops27h 45m
Multiple Airlines
Thu 5/1120:35
BWI
-
SOU
2 stops17h 55m
Multiple Airlines
Deal found 8/5£806
Thu 29/1017:30
SOU
-
IAD
1 stop27h 15m
KLM
Thu 5/1117:35
IAD
-
SOU
1 stop9h 30m
KLM
Deal found 4/5£813
Thu 29/1008:50
SOU
-
BWI
2 stops28h 26m
KLM
Thu 5/1113:00
BWI
-
SOU
2 stops14h 05m
KLM
Deal found 6/5£817
Wed 29/706:50
SOU
-
BWI
2 stops17h 50m
British Airways
Mon 3/821:30
BWI
-
SOU
2 stops18h 25m
British Airways
Deal found 4/5£838
Tue 28/708:55
SOU
-
BWI
2 stops15h 45m
British Airways
Mon 3/821:30
BWI
-
SOU
2 stops18h 25m
British Airways
Deal found 4/5£839

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 9 May 2026.

Round-trip from

£619

One-way from

£475

Popular in

July

Cheapest in

February

Average price

£509
Aer Lingus
  • Aer Lingus
  • 6/6-12/6
  • 2 total stops
  • 32h 10m total
  • Southampton to Washington, D.C.
Search Deals
14/7
  • 14/7
  • 3 total stops
  • 30h 15m total
  • Southampton to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£42 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 9 May 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 - 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

£734

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 18/6

09:20-19:00

1 stop14h 40m

Washington, D.C. Dulles Intl

Thu 25/6

20:45-19:30

1 stop17h 45m

£735

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Sat 6/6

09:20-22:28

2 stops18h 08m

Washington, D.C. Reagan-National

Fri 12/6

18:55-19:30

2 stops19h 35m

£765

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Thu 29/10

20:00-19:45

2 stops27h 45m

Baltimore/Washington

Thu 5/11

20:35-19:30

2 stops17h 55m

£806

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/10

08:50-16:45

1 stop11h 55m

Washington, D.C. Dulles Intl

Thu 5/11

12:30-08:05

2 stops14h 35m

£816

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Thu 29/10

08:50-22:55

2 stops18h 05m

Baltimore/Washington

Thu 5/11

13:00-08:05

2 stops14h 05m

£817

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/10

08:50-23:02

2 stops18h 12m

Washington, D.C. Dulles Intl

Thu 5/11

12:30-08:05

2 stops14h 35m

£817

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 19/10

09:20-19:15

1 stop14h 55m

Washington, D.C. Dulles Intl

Thu 29/10

22:00-16:35

1 stop14h 35m

£823
Fastest return journey

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Tue 28/7

09:15-15:45

1 stop11h 30m

Washington, D.C. Dulles Intl

Wed 5/8

17:15-08:40

1 stop10h 25m

£824

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Wed 29/7

06:50-19:40

2 stops17h 50m

Baltimore/Washington

Mon 3/8

21:30-20:55

2 stops18h 25m

£838

Flights are sorted by cheapest return flights first.

Deals found on 4/5

Showing 1-10 of 41 resultsSorted by cheapest first
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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’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 73% 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 £575.

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 Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 11h 15m.

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.

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 1 airline has 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 £816, Aer Lingus can have you in Washington, D.C. from Southampton in 11h 55m. 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 is the cheapest airline to fly from Southampton to Washington, D.C. round-trip?

    Our cheapest airline available from Southampton to Washington, D.C. is Aer Lingus. Our recent data shows that you can find tickets from as low as £446 on this airline.

  • 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 - Baltimore/Washington. You may also consider Southampton Eastleigh - Washington, D.C. Dulles Intl or Southampton Eastleigh - Washington, D.C. Reagan-National.

  • 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.

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
Gaithersburg
Woodbridge
Arlington
Alexandria

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Southampton to Washington, D.C.

Discover the top airline that operate flights from Southampton to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 9 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£446Average£584FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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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