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Cheap flights from London Southend Airport to Washington, D.C. Dulles Intl Airport from £336

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEN — IAD
25 Aug — 1 Sep1
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 July 2026.

Thu 3/917:15
SEN
-
IAD
2 stops31h 10m
Multiple Airlines
Thu 10/918:15
IAD
-
SEN
1 stop11h 30m
Multiple Airlines
Deal found 22/7£846
Thu 30/720:40
SEN
-
IAD
3 stops27h 20m
Multiple Airlines
Thu 27/820:30
IAD
-
SEN
2 stops17h 40m
Multiple Airlines
Deal found 22/7£884
Mon 27/716:00
SEN
-
IAD
2 stops32h 00m
Multiple Airlines
Sun 9/821:00
IAD
-
SEN
2 stops20h 25m
Multiple Airlines
Deal found 26/7£915
Tue 4/807:00
SEN
-
IAD
2 stops17h 00m
Multiple Airlines
Mon 17/817:40
IAD
-
SEN
2 stops14h 50m
Multiple Airlines
Deal found 24/7£1,068
Mon 27/719:20
SEN
-
IAD
2 stops24h 50m
Multiple Airlines
Thu 30/717:45
IAD
-
SEN
2 stops17h 15m
Multiple Airlines
Deal found 26/7£1,093
Sat 1/808:40
SEN
-
IAD
2 stops15h 20m
Multiple Airlines
Tue 4/821:00
IAD
-
SEN
2 stops20h 20m
Multiple Airlines
Deal found 25/7£1,094
Sat 25/708:40
SEN
-
IAD
2 stops15h 20m
Multiple Airlines
Sun 26/721:00
IAD
-
SEN
2 stops20h 25m
Multiple Airlines
Deal found 24/7£1,175
Sat 1/808:40
SEN
-
IAD
2 stops15h 20m
Multiple Airlines
Sat 8/821:00
IAD
-
SEN
2 stops20h 10m
Multiple Airlines
Deal found 25/7£1,254
Fri 7/806:30
SEN
-
IAD
2 stops17h 30m
Multiple Airlines
Thu 20/817:45
IAD
-
SEN
2 stops14h 15m
Multiple Airlines
Deal found 26/7£1,368
Sat 25/708:40
SEN
-
IAD
2 stops15h 20m
Multiple Airlines
Sat 1/821:00
IAD
-
SEN
2 stops20h 10m
Multiple Airlines
Deal found 24/7£1,385

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 July 2026.

Round-trip from

£846

One-way from

£336

Popular in

June

Cheapest in

February

Average price

£572
3/9-10/9
  • 3/9-10/9
  • 3 total stops
  • 42h 40m total
  • London to Washington, D.C.
Search Deals
1/9
  • 1/9
  • 2 total stops
  • 37h 40m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£39 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 July 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 26 July 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

Thu 3/9

17:15-19:25

2 stops31h 10m

Washington, D.C. Dulles Intl

Thu 10/9

18:15-10:45

1 stop11h 30m

£846

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Fri 7/8

06:30-19:00

2 stops17h 30m

Washington, D.C. Dulles Intl

Thu 20/8

17:45-13:00

2 stops14h 15m

£1,368

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sun 23/8

07:35-19:25

2 stops16h 50m

Washington, D.C. Dulles Intl

Sun 23/8

21:45-18:50

2 stops16h 05m

£1,398

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Mon 7/9

11:10-16:05

1 stop33h 55m

Washington, D.C. Dulles Intl

Mon 14/9

17:15-07:55

2 stops33h 40m

£1,531
Fastest return journey

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Wed 26/8

12:15-19:35

1 stop12h 20m

Washington, D.C. Dulles Intl

Wed 26/8

21:45-16:40

1 stop13h 55m

£1,626

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Wed 2/9

16:50-15:35

1 stop27h 45m

Washington, D.C. Dulles Intl

Mon 7/9

17:40-07:55

2 stops33h 15m

£1,819
Cheapest one-way

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Fri 23/10

07:15-15:30

3 stops37h 15m

£341

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sun 30/8

19:50-15:10

3 stops48h 20m

£350

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Wed 7/10

15:40-18:50

3 stops32h 10m

£377

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Fri 11/9

11:20-10:45

3 stops28h 25m

£392

Flights are sorted by cheapest return flights first.

Deals found on 22/7

Showing 1-10 of 16 resultsSorted by cheapest first
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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
Gaithersburg
Oxon Hill
Hanover
Woodbridge
Alexandria
Sterling

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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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