Find flights
When to book
FAQs

Cheap flights from Southampton to Washington, D.C. from £608

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — WAS
26 Apr — 3 May1
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 27 March 2026.

Wed 8/409:20
SOU
-
IAD
2 stops15h 00m
Multiple Airlines
Tue 14/420:30
IAD
-
SOU
2 stops18h 00m
Multiple Airlines
Deal found 24/3£608
Mon 11/509:20
SOU
-
IAD
1 stop11h 25m
Multiple Airlines
Mon 18/517:15
IAD
-
SOU
1 stop10h 25m
Multiple Airlines
Deal found 26/3£623
Sat 9/509:20
SOU
-
IAD
1 stop14h 50m
Aer Lingus
Sat 16/517:15
IAD
-
SOU
1 stop10h 20m
Aer Lingus
Deal found 25/3£633
Sun 19/720:45
SOU
-
BWI
2 stops27h 55m
British Airways
Mon 24/821:30
BWI
-
SOU
2 stops16h 55m
British Airways
Deal found 26/3£656
Sun 19/720:45
SOU
-
BWI
2 stops27h 55m
British Airways
Tue 25/819:25
BWI
-
SOU
2 stops20h 40m
British Airways
Deal found 26/3£665
Mon 11/509:20
SOU
-
DCA
2 stops18h 39m
Multiple Airlines
Mon 18/506:00
DCA
-
SOU
2 stops21h 40m
Multiple Airlines
Deal found 26/3£667
Sun 19/720:45
SOU
-
BWI
2 stops27h 55m
British Airways
Wed 26/819:25
BWI
-
SOU
2 stops18h 35m
British Airways
Deal found 26/3£668
Mon 11/506:50
SOU
-
IAD
2 stops15h 35m
British Airways
Mon 18/520:55
IAD
-
SOU
1 stop17h 35m
British Airways
Deal found 26/3£668
Thu 23/417:20
SOU
-
IAD
1 stop31h 05m
British Airways
Mon 27/417:15
IAD
-
SOU
1 stop10h 25m
British Airways
Deal found 25/3£674
Wed 22/708:55
SOU
-
BWI
2 stops15h 45m
British Airways
Tue 25/819:25
BWI
-
SOU
2 stops20h 40m
British Airways
Deal found 26/3£676
Wed 22/708:55
SOU
-
BWI
2 stops15h 45m
British Airways
Wed 26/819:25
BWI
-
SOU
2 stops18h 35m
British Airways
Deal found 26/3£679
Sun 19/720:45
SOU
-
IAD
2 stops27h 30m
British Airways
Thu 27/822:25
IAD
-
SOU
2 stops15h 35m
British Airways
Deal found 26/3£682

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 27 March 2026.

Round-trip from

£608

Popular in

July

Cheapest in

February

Average price

£521
8/4-14/4
  • 8/4-14/4
  • 4 total stops
  • 33h 00m total
  • Southampton to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£54 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 27 March 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

Wed 8/4

09:20-19:20

2 stops15h 00m

Washington, D.C. Dulles Intl

Tue 14/4

20:30-19:30

2 stops18h 00m

£608

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Sun 19/7

20:45-19:40

2 stops27h 55m

Baltimore/Washington

Mon 24/8

21:30-19:25

2 stops16h 55m

£656

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Mon 20/7

19:55-19:40

2 stops28h 45m

Baltimore/Washington

Wed 26/8

19:25-19:00

2 stops18h 35m

£668

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 11/5

06:50-17:25

2 stops15h 35m

Washington, D.C. Dulles Intl

Mon 18/5

20:55-19:30

1 stop17h 35m

£668

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 23/4

17:20-19:25

1 stop31h 05m

Washington, D.C. Dulles Intl

Mon 27/4

17:15-08:40

1 stop10h 25m

£674

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Wed 22/7

08:55-19:40

2 stops15h 45m

Baltimore/Washington

Tue 25/8

19:25-21:05

2 stops20h 40m

£676

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Tue 21/7

19:55-15:45

2 stops24h 50m

Washington, D.C. Dulles Intl

Thu 27/8

22:25-19:00

2 stops15h 35m

£682

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Tue 26/5

06:50-19:40

2 stops17h 50m

Baltimore/Washington

Tue 2/6

21:30-17:40

2 stops15h 10m

£715

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Tue 26/5

06:50-19:40

2 stops17h 50m

Baltimore/Washington

Wed 3/6

21:30-17:40

2 stops15h 10m

£715

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Fri 26/6

06:50-19:40

2 stops17h 50m

Baltimore/Washington

Sat 25/7

21:30-19:00

2 stops16h 30m

£742

Flights are sorted by cheapest return flights first.

Deals found on 26/3

Showing 1-10 of 46 resultsSorted by cheapest first
1
2
3
...
5

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, January is the cheapest month in which you can book a flight from Southampton to Washington, D.C. (average of £336). Flying from Southampton to Washington, D.C. in July is currently the most expensive (average of £461). 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 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 £586.

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 £656, British Airways can have you in Washington, D.C. from Southampton in 27h 55m. The distance from Southampton to Washington, D.C. is about 3597 mi.

  • 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 £454 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 - Washington, D.C. Dulles Intl. You may also consider Southampton Eastleigh - Baltimore/Washington 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.

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

    Currently, January is the cheapest month in which you can book a flight from Southampton to Washington, D.C. (average of £336). Flying from Southampton to Washington, D.C. in July is currently the most expensive (average of £461). 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
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 27 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£454Average£595FlexibilityNo 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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.