Find flights
When to book

Cheap flights from London Southend Airport to Washington, D.C. Dulles Intl Airport from £378

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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEN — IAD
12 Apr — 19 Apr1
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 13 March 2026.

Wed 15/408:25
SEN
-
IAD
2 stops17h 10m
Multiple Airlines
Sun 26/422:35
IAD
-
SEN
2 stops16h 00m
Multiple Airlines
Deal found 9/3£636
Sat 5/916:50
SEN
-
IAD
2 stops27h 20m
Multiple Airlines
Sat 26/920:30
IAD
-
SEN
2 stops14h 10m
Multiple Airlines
Deal found 11/3£659
Tue 7/407:00
SEN
-
IAD
3 stops37h 45m
Multiple Airlines
Sat 18/420:30
IAD
-
SEN
3 stops21h 50m
Multiple Airlines
Deal found 7/3£678
Sun 19/407:25
SEN
-
IAD
1 stop17h 10m
Multiple Airlines
Sat 2/518:15
IAD
-
SEN
1 stop11h 10m
Multiple Airlines
Deal found 9/3£789
Wed 22/408:25
SEN
-
IAD
2 stops35h 45m
Multiple Airlines
Wed 29/418:15
IAD
-
SEN
1 stop13h 45m
Multiple Airlines
Deal found 8/3£838
Mon 6/411:10
SEN
-
IAD
2 stops16h 49m
Multiple Airlines
Sun 19/418:15
IAD
-
SEN
1 stop11h 15m
Multiple Airlines
Deal found 10/3£880
Thu 23/417:15
SEN
-
IAD
2 stops31h 10m
Multiple Airlines
Thu 30/418:15
IAD
-
SEN
1 stop11h 30m
Multiple Airlines
Deal found 9/3£894
Mon 13/411:10
SEN
-
IAD
1 stop13h 25m
Multiple Airlines
Sun 19/418:15
IAD
-
SEN
1 stop11h 15m
Multiple Airlines
Deal found 12/3£934
Wed 25/307:10
SEN
-
IAD
1 stop14h 25m
Multiple Airlines
Sun 5/418:15
IAD
-
SEN
1 stop11h 15m
Multiple Airlines
Deal found 9/3£1,041
Tue 9/607:00
SEN
-
IAD
2 stops17h 00m
Multiple Airlines
Tue 9/622:35
IAD
-
SEN
2 stops18h 45m
Multiple Airlines
Deal found 11/3£1,480
Wed 18/307:10
SEN
-
IAD
1 stop14h 25m
Multiple Airlines
Thu 26/319:50
IAD
-
SEN
1 stop13h 00m
Multiple Airlines
Deal found 11/3£1,601

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 13 March 2026.

Round-trip from

£636

One-way from

£378

Popular in

July

Cheapest in

February

Average price

£513
15/4-26/4
  • 15/4-26/4
  • 4 total stops
  • 33h 10m total
  • London to Washington, D.C.
Search Deals
3/6
  • 3/6
  • 2 total stops
  • 27h 45m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£57 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 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 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 13 March 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

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sat 5/9

16:50-15:10

2 stops27h 20m

Washington, D.C. Dulles Intl

Sat 26/9

20:30-15:40

2 stops14h 10m

£659

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 7/4

07:00-15:45

3 stops37h 45m

Washington, D.C. Dulles Intl

Sat 18/4

20:30-23:20

3 stops21h 50m

£678

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sun 19/4

07:25-19:35

1 stop17h 10m

Washington, D.C. Dulles Intl

Sat 2/5

18:15-10:25

1 stop11h 10m

£789

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Wed 15/4

08:25-20:35

2 stops17h 10m

Washington, D.C. Dulles Intl

Sun 26/4

18:15-10:30

1 stop11h 15m

£835

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Mon 13/4

11:10-19:35

1 stop13h 25m

Washington, D.C. Dulles Intl

Sun 19/4

18:15-10:30

1 stop11h 15m

£934

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Wed 25/3

07:10-17:35

1 stop14h 25m

Washington, D.C. Dulles Intl

Sun 5/4

18:15-10:30

1 stop11h 15m

£1,041

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 9/6

07:00-19:00

2 stops17h 00m

Washington, D.C. Dulles Intl

Tue 9/6

22:35-22:20

2 stops18h 45m

£1,480

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Thu 23/4

13:55-15:35

1 stop30h 40m

Washington, D.C. Dulles Intl

Thu 30/4

18:15-10:45

1 stop11h 30m

£1,913
Fastest return journey

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 24/3

07:35-17:05

1 stop13h 30m

Washington, D.C. Dulles Intl

Fri 27/3

19:05-10:00

1 stop10h 55m

£2,080

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sat 28/3

07:15-17:05

1 stop13h 50m

Washington, D.C. Dulles Intl

Sat 28/3

19:50-18:45

2 stops18h 55m

£2,456

Flights are sorted by cheapest return flights first.

Deals found on 8/3

Showing 1-10 of 20 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
Woodbridge
Arlington
Alexandria
Sterling
College Park

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.