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Cheap flights from Southampton to Washington, D.C. Dulles Intl Airport from £292

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 22/8. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — IAD
8 Jul — 15 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Southampton to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Southampton to Dulles Intl
Explore the most affordable flight options available from Southampton to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 June 2026.

Wed 8/709:20
SOU
-
IAD
1 stop14h 55m
British Airways
Fri 24/717:15
IAD
-
SOU
1 stop18h 35m
British Airways
Deal found 7/6£509
Mon 28/909:20
SOU
-
IAD
1 stop11h 25m
British Airways
Mon 5/1017:15
IAD
-
SOU
1 stop10h 25m
British Airways
Deal found 6/6£511
Thu 29/1009:20
SOU
-
IAD
1 stop11h 15m
British Airways
Thu 5/1117:05
IAD
-
SOU
1 stop18h 30m
British Airways
Deal found 6/6£513
Sun 5/720:00
SOU
-
IAD
1 stop28h 15m
British Airways
Sun 12/717:15
IAD
-
SOU
1 stop18h 35m
British Airways
Deal found 7/6£519
Fri 23/1020:00
SOU
-
IAD
1 stop24h 45m
British Airways
Sun 1/1121:00
IAD
-
SOU
1 stop17h 30m
British Airways
Deal found 6/6£524
Wed 1/717:20
SOU
-
IAD
1 stop27h 25m
British Airways
Tue 7/717:15
IAD
-
SOU
1 stop9h 50m
British Airways
Deal found 5/6£526
Sun 23/820:00
SOU
-
IAD
1 stop28h 25m
British Airways
Mon 31/817:15
IAD
-
SOU
1 stop10h 25m
British Airways
Deal found 6/6£531
Wed 22/720:00
SOU
-
IAD
1 stop24h 45m
British Airways
Mon 27/717:15
IAD
-
SOU
1 stop10h 25m
British Airways
Deal found 5/6£532
Fri 21/809:20
SOU
-
IAD
1 stop15h 05m
British Airways
Thu 3/917:15
IAD
-
SOU
1 stop10h 25m
British Airways
Deal found 6/6£546
Sat 24/1017:20
SOU
-
IAD
1 stop28h 15m
British Airways
Sat 31/1018:05
IAD
-
SOU
1 stop18h 30m
British Airways
Deal found 6/6£550

Find flight deals from Southampton to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Southampton (SOU) to Dulles Intl (IAD). 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 8 June 2026.

Round-trip from

£509

One-way from

£292

Popular in

June

Cheapest in

February

Average price

£595
British Airways
  • British Airways
  • 8/7-24/7
  • 2 total stops
  • 33h 30m total
  • Southampton to Washington, D.C.
Search Deals
22/8
  • 22/8
  • 3 total stops
  • 55h 55m total
  • Southampton to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£43 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 June 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Southampton to Dulles Intl 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 8 June 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
Fastest return journey

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

17:05-08:40

1 stop10h 35m

£511

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 23/7

20:00-15:45

1 stop24h 45m

Washington, D.C. Dulles Intl

Mon 27/7

17:15-08:40

1 stop10h 25m

£562

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 22/7

20:00-15:45

1 stop24h 45m

Washington, D.C. Dulles Intl

Tue 28/7

17:15-08:05

1 stop9h 50m

£562

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 21/8

09:20-15:45

1 stop11h 25m

Washington, D.C. Dulles Intl

Tue 1/9

22:25-19:00

2 stops15h 35m

£572

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sat 22/8

19:40-17:25

2 stops26h 45m

Washington, D.C. Dulles Intl

Thu 3/9

17:15-08:40

1 stop10h 25m

£585

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/10

08:40-16:45

1 stop12h 05m

Washington, D.C. Dulles Intl

Thu 5/11

19:59-17:00

2 stops16h 01m

£633

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-20:55

2 stops15h 35m

Washington, D.C. Dulles Intl

Thu 5/11

18:20-19:30

2 stops20h 10m

£653

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 5/7

20:00-19:15

1 stop28h 15m

Washington, D.C. Dulles Intl

Sun 12/7

21:00-17:45

2 stops15h 45m

£660
Cheapest one-way

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sat 22/8

20:00-10:45

2 stops43h 45m

£319
Fastest single journey

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 23/11

09:20-15:35

1 stop11h 15m

£435

Flights are sorted by cheapest return flights first.

Deals found on 4/6

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Best time to book a flight from Southampton to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl 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. Dulles Intl Airport

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

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

Dublin (DUB) – chosen by Cheapflights users on 75% of one-stop itineraries from Southampton to Washington, D.C. Dulles Intl Airport on Cheapflights.

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

Average return fare for one-stop flights from Southampton to Washington, D.C. Dulles Intl Airport, 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 £572.

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

Shortest average travel time for one-stop one-way flights from Southampton to Washington, D.C. Dulles Intl Airport, 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: 12h 05m.

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

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

Flights via Dublin (DUB) offer the fastest connection on this route, with an average stopover time of 3h 14m.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated 8 June 2026.
See what other customers who have flown with Aer Lingus from Southampton to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,600 reviews
Check prices

Boarding

7.4

Food

6.7

Crew

8.1

Overall

7.3

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DUB - EWR

Underpricer is a terrible organization that inserted itself as a “travel agent” simply by way of me booking on kayak. Never would I have willing assented to using underpricer. Further, we had a problem whereby two duplicate one-way flights from Dublin were inadvertently booked for me and my wife, stemming from a family emergency. My wife’s sister / my sister in law had a brain tumor and immediate surgery to remove it, which obviously impacted our previously planned travel arrangements. I tried to cancel the flight due to the extenuating circumstances. Underpricer said canceling was not possible, but a credit would be possible for the exact same flight - one way from Dublin - to be used in one year from the original flight date. I asked if it would be possible to make the credit a general credit to any participating AerLingus airport destination, which would allow more flexibility than having to go back to Ireland within a year. In order to pursue the credit, Underpricer requested documentary proof regarding my sister in laws brain tumor, which we gave them. Underpricer then asked us to document our relationship to the patient - so I gave them my marriage certificate to evidence my wife and her sister having the same last name. Underpricer asked for further proof, so we gave them copies of my passport, my wife’s passport, and my sister in laws passport. All of these hoops to jump through for Underpricer, with sporadic communication on their part throughout, only for them to say 3 days before the original booking that no credit was available - not even the one they originally offered. They said my only option was to pick a date within the next year to move the flight to - and of course to make that change, they charged me an additional $350 fee just to make that change. What a pathetic, fraudulent organization. Kayak should be embarrassed to be associated with Underpricer and should cease that relationship immediately. And for AerLingus, who only Underpricer could talk to regarding the booking (I was not permitted) to not understand our family’s situation and just stand by blanket policy that no credit is permitted, is equally disappointing.
Aer Lingus
7.3
Good
1,600 reviews
Aer Lingus
7.3
Good
1,600 reviews
Check prices

Boarding

7.4

Food

6.7

Crew

8.1

Overall

7.3

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DUB - EWR

Underpricer is a terrible organization that inserted itself as a “travel agent” simply by way of me booking on kayak. Never would I have willing assented to using underpricer. Further, we had a problem whereby two duplicate one-way flights from Dublin were inadvertently booked for me and my wife, stemming from a family emergency. My wife’s sister / my sister in law had a brain tumor and immediate surgery to remove it, which obviously impacted our previously planned travel arrangements. I tried to cancel the flight due to the extenuating circumstances. Underpricer said canceling was not possible, but a credit would be possible for the exact same flight - one way from Dublin - to be used in one year from the original flight date. I asked if it would be possible to make the credit a general credit to any participating AerLingus airport destination, which would allow more flexibility than having to go back to Ireland within a year. In order to pursue the credit, Underpricer requested documentary proof regarding my sister in laws brain tumor, which we gave them. Underpricer then asked us to document our relationship to the patient - so I gave them my marriage certificate to evidence my wife and her sister having the same last name. Underpricer asked for further proof, so we gave them copies of my passport, my wife’s passport, and my sister in laws passport. All of these hoops to jump through for Underpricer, with sporadic communication on their part throughout, only for them to say 3 days before the original booking that no credit was available - not even the one they originally offered. They said my only option was to pick a date within the next year to move the flight to - and of course to make that change, they charged me an additional $350 fee just to make that change. What a pathetic, fraudulent organization. Kayak should be embarrassed to be associated with Underpricer and should cease that relationship immediately. And for AerLingus, who only Underpricer could talk to regarding the booking (I was not permitted) to not understand our family’s situation and just stand by blanket policy that no credit is permitted, is equally disappointing.

Related info for your journey

Find useful and relevant information for your journey from Southampton to Dulles Intl. 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. Dulles Intl?

    Most people fly from Southampton Eastleigh (SOU) if they book a flight from Southampton to Washington, D.C. Dulles Intl. On average, Eastleigh has 0 outbound flights to Washington, D.C. Dulles Intl per day from 1 airline. Southampton Eastleigh is conveniently located just 3.5 mi from Southampton’s city center.

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

    Departing from Southampton to Washington, D.C. Dulles Intl Airport will take you 15h 10m. Southampton and Washington, D.C. Dulles Intl Airport are separated by a distance of 3639 mi.

  • What is the cheapest airline to fly from Southampton to Washington, D.C. Dulles Intl Airport round-trip?

    Cheapflights users have booked flights from Southampton to Washington, D.C. Dulles Intl Airport round-trip from £455.

  • Can I find deals for flights from Southampton to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Southampton to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Southampton to Dulles Intl?

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

  • Can I find deals for business class flights from Southampton to Dulles Intl?

    Yes. Cheapflights offers flight deals from Southampton to Dulles Intl 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. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Gaithersburg
Woodbridge
Alexandria
Sterling

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Alternative routes for Southampton to Dulles Intl

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

Top airline flying from Southampton to Dulles Intl

Discover the top airline that operate flights from Southampton to Dulles Intl. 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 8 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£455Average£596FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Southampton to Dulles Intl?

Cheapflights makes it easy to find Southampton to Dulles Intl flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Southampton to Dulles Intl?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Southampton to Dulles Intl.

Can Cheapflights find flights from Southampton to Dulles Intl with no change fees?

Need flexible booking options for your flight to Dulles Intl from Southampton? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Southampton to Dulles Intl become cheaper?

Yes, Cheapflights offers price alerts on Southampton to Dulles Intl flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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