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Cheap flights from London Southend Airport to Washington, D.C. Dulles Intl Airport from £391

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 19/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEN — IAD
25 Feb — 4 Mar1
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 26 January 2026.

Wed 8/407:05
SEN
-
IAD
2 stops16h 55m
Multiple Airlines
Wed 22/420:30
IAD
-
SEN
2 stops19h 55m
Multiple Airlines
Deal found 25/1£588
Fri 27/310:00
SEN
-
IAD
1 stop14h 30m
Multiple Airlines
Thu 9/418:15
IAD
-
SEN
1 stop11h 30m
Multiple Airlines
Deal found 24/1£778
Tue 10/307:35
SEN
-
IAD
1 stop13h 30m
Multiple Airlines
Tue 17/319:05
IAD
-
SEN
2 stops23h 40m
Multiple Airlines
Deal found 24/1£917

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 26 January 2026.

Round-trip from

£588

One-way from

£391

Popular in

July

Cheapest in

February

Average price

£465
8/4-22/4
  • 8/4-22/4
  • 4 total stops
  • 36h 50m total
  • London to Washington, D.C.
Search Deals
19/3
  • 19/3
  • 3 total stops
  • 40h 30m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£55 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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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 26 January 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

Southend

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Wed 8/4

07:05-19:00

2 stops16h 55m

Washington, D.C. Dulles Intl

Wed 22/4

20:30-21:25

2 stops19h 55m

£588

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Fri 27/3

10:00-20:30

1 stop14h 30m

Washington, D.C. Dulles Intl

Thu 9/4

18:15-10:45

1 stop11h 30m

£778

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 10/3

07:35-17:05

1 stop13h 30m

Washington, D.C. Dulles Intl

Tue 17/3

19:05-22:45

2 stops23h 40m

£917

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Thu 19/3

07:15-19:45

3 stops40h 30m

£391

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 19/5

06:30-20:35

2 stops19h 05m

£399

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Fri 19/6

20:05-19:10

2 stops28h 05m

£404

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Fri 13/2

16:05-15:15

3 stops28h 10m

£435

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sun 15/3

07:10-19:45

2 stops16h 35m

£442

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Mon 25/5

07:30-20:35

2 stops18h 05m

£449

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 17/3

20:20-16:35

2 stops24h 15m

£457

Flights are sorted by cheapest return flights first.

Deals found on 25/1

Showing 1-10 of 11 results
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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
College Park

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

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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.

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