Find flights
When to book

Cheap flights from London Southend Airport to Washington, D.C. Dulles Intl Airport from £414

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 18/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEN — IAD
23 May — 30 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Southend to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Southend to Dulles Intl
Explore the most affordable flight options available from Southend to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 April 2026.

Thu 23/406:30
SEN
-
IAD
3 stops38h 15m
Multiple Airlines
Tue 28/421:05
IAD
-
SEN
3 stops20h 55m
Multiple Airlines
Deal found 21/4£645
Thu 14/510:10
SEN
-
IAD
1 stop14h 25m
Multiple Airlines
Thu 28/518:15
IAD
-
SEN
1 stop11h 30m
Multiple Airlines
Deal found 22/4£760
Wed 1/712:15
SEN
-
IAD
1 stop12h 20m
Multiple Airlines
Sat 11/718:15
IAD
-
SEN
1 stop20h 05m
Multiple Airlines
Deal found 19/4£773
Mon 20/411:10
SEN
-
IAD
2 stops29h 25m
Multiple Airlines
Wed 22/413:20
IAD
-
SEN
2 stops18h 40m
Multiple Airlines
Deal found 19/4£858
Sun 21/607:25
SEN
-
IAD
1 stop17h 10m
Multiple Airlines
Sun 28/618:15
IAD
-
SEN
1 stop11h 15m
Multiple Airlines
Deal found 20/4£966
Sun 3/507:25
SEN
-
IAD
1 stop17h 10m
Multiple Airlines
Sat 16/518:15
IAD
-
SEN
1 stop11h 10m
Multiple Airlines
Deal found 18/4£980
Sat 18/708:40
SEN
-
IAD
2 stops15h 20m
Multiple Airlines
Sat 18/722:35
IAD
-
SEN
2 stops18h 25m
Multiple Airlines
Deal found 20/4£1,089
Sun 7/616:25
SEN
-
IAD
2 stops51h 45m
Multiple Airlines
Sun 14/618:15
IAD
-
SEN
1 stop11h 15m
Multiple Airlines
Deal found 23/4£1,118
Sun 5/707:35
SEN
-
IAD
2 stops16h 40m
Multiple Airlines
Sun 5/722:35
IAD
-
SEN
2 stops15h 15m
Multiple Airlines
Deal found 20/4£1,380
Wed 10/608:25
SEN
-
IAD
2 stops15h 35m
Multiple Airlines
Wed 10/622:35
IAD
-
SEN
2 stops18h 15m
Multiple Airlines
Deal found 21/4£1,566

Find flight deals from Southend to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Southend (SEN) 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 23 April 2026.

Round-trip from

£760

One-way from

£414

Popular in

July

Cheapest in

February

Average price

£526
14/5-28/5
  • 14/5-28/5
  • 2 total stops
  • 25h 55m total
  • London to Washington, D.C.
Search Deals
18/10
  • 18/10
  • 3 total stops
  • 27h 55m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£47 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Southend 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 23 April 2026.
Use the filters below to find and compare flights from London Southend Airport 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

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Thu 14/5

10:10-19:35

1 stop14h 25m

Washington, D.C. Dulles Intl

Thu 28/5

18:15-10:45

1 stop11h 30m

£760

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Wed 1/7

12:15-19:35

1 stop12h 20m

Washington, D.C. Dulles Intl

Sat 11/7

18:15-19:20

1 stop20h 05m

£773

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sun 21/6

07:25-19:35

1 stop17h 10m

Washington, D.C. Dulles Intl

Sun 28/6

18:15-10:30

1 stop11h 15m

£966

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sun 3/5

07:25-19:35

1 stop17h 10m

Washington, D.C. Dulles Intl

Sat 16/5

18:15-10:25

1 stop11h 10m

£980

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sat 18/7

08:40-19:00

2 stops15h 20m

Washington, D.C. Dulles Intl

Sat 18/7

22:35-22:00

2 stops18h 25m

£1,089

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sun 7/6

16:25-15:10

2 stops51h 45m

Washington, D.C. Dulles Intl

Sun 14/6

18:15-10:30

1 stop11h 15m

£1,118

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Wed 10/6

08:25-19:00

2 stops15h 35m

Washington, D.C. Dulles Intl

Wed 10/6

22:35-21:50

2 stops18h 15m

£1,566
Cheapest one-way

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 5/5

07:00-15:10

3 stops37h 10m

£414

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Thu 30/4

06:30-15:45

3 stops38h 15m

£415

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 2/6

06:30-15:10

2 stops37h 40m

£417

Flights are sorted by cheapest return flights first.

Deals found on 22/4

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Best time to book a flight from Southend to Dulles Intl

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

Related info for your journey

Find useful and relevant information for your journey from Southend to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Southend 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.

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
Arlington
Alexandria
Sterling

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.

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 Southend to Dulles Intl?

Cheapflights makes it easy to find Southend 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 Southend to Dulles Intl?

Cheapflights simply makes it quick and affordable to book flights from Southend to Dulles Intl by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Need flexible booking options for your flight to Dulles Intl from Southend? 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 Southend to Dulles Intl become cheaper?

Of course! You can now track prices for flights from Southend to Dulles Intl and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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.