How does momondo find its flight prices?

We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

What documentation or ID do you need to fly to London Southend Airport?

The necessary travel and health documents for your London Southend Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£248 Cheap Flights from Washington, D.C. Dulles Intl Airport to London Southend Airport in 2026

1 adult

0 bags

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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to London

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

19:40 - 21:00

IAD

SEN

20h 20m

2 stops

07:10 - 19:30

SEN

IAD

16h 20m

2 stops

£448Multiple Airlines

Wed, 4 Mar - Wed, 11 Mar

19:40 - 21:00

IAD

SEN

20h 20m

2 stops

07:10 - 18:30

SEN

IAD

16h 20m

2 stops

£451Multiple Airlines

Wed, 25 Feb - Wed, 4 Mar

19:40 - 21:00

IAD

SEN

20h 20m

2 stops

07:10 - 18:30

SEN

IAD

16h 20m

2 stops

£452Multiple Airlines

Wed, 25 Feb - Wed, 4 Mar

21:30 - 21:00

IAD

SEN

19h 30m

2 stops

07:10 - 18:15

SEN

IAD

15h 05m

2 stops

£515Multiple Airlines

Wed, 11 Mar - Wed, 18 Mar

09:55 - 12:50

IAD

SEN

22h 55m

2 stops

18:05 - 21:05

SEN

IAD

31h 00m

2 stops

£519Multiple Airlines

Thu, 19 Mar - Sun, 22 Mar

20:30 - 21:25

IAD

SEN

19h 55m

2 stops

17:30 - 20:35

SEN

IAD

32h 05m

3 stops

£552Multiple Airlines

Wed, 15 Apr - Sun, 19 Apr

18:00 - 12:50

IAD

SEN

13h 50m

2 stops

07:15 - 20:26

SEN

IAD

18h 11m

2 stops

£686Multiple Airlines

Thu, 26 Feb - Mon, 2 Mar

18:50 - 12:50

IAD

SEN

13h 00m

1 stop

07:15 - 16:35

SEN

IAD

14h 20m

1 stop

£728Multiple Airlines

Thu, 26 Feb - Mon, 2 Mar

18:30 - 19:45

IAD

SEN

21h 15m

2 stops

07:10 - 19:45

SEN

IAD

16h 35m

2 stops

£780Multiple Airlines

Mon, 16 Mar - Sun, 22 Mar

20:30 - 20:50

IAD

SEN

19h 20m

2 stops

07:10 - 17:15

SEN

IAD

15h 05m

2 stops

£798Multiple Airlines

Sat, 28 Feb - Wed, 4 Mar

momondo Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London Southend Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 4/3

19:40-21:00

2 stops20h 20m

London Southend

Wed 11/3

07:10-19:30

2 stops16h 20m

£448

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 25/2

19:40-21:00

2 stops20h 20m

London Southend

Wed 4/3

07:10-18:30

2 stops16h 20m

£451

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 25/2

19:40-21:00

2 stops20h 20m

London Southend

Wed 4/3

07:10-18:30

2 stops16h 20m

£452

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 11/3

21:30-21:00

2 stops19h 30m

London Southend

Wed 18/3

07:10-18:15

2 stops15h 05m

£515

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Thu 19/3

09:55-12:50

2 stops22h 55m

London Southend

Sun 22/3

18:05-21:05

2 stops31h 00m

£519

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 15/4

20:30-21:25

2 stops19h 55m

London Southend

Sun 19/4

17:30-20:35

3 stops32h 05m

£552

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Thu 26/2

18:00-12:50

2 stops13h 50m

London Southend

Mon 2/3

07:15-20:26

2 stops18h 11m

£686

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Thu 26/2

18:50-12:50

1 stop13h 00m

London Southend

Mon 2/3

07:15-16:35

1 stop14h 20m

£728

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Mon 16/3

18:30-19:45

2 stops21h 15m

London Southend

Sun 22/3

07:10-19:45

2 stops16h 35m

£780

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sat 28/2

20:30-20:50

2 stops19h 20m

London Southend

Wed 4/3

07:10-17:15

2 stops15h 05m

£798

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

When to book flights from Washington, D.C. Dulles Intl Airport to London Southend Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to London Southend Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Washington, D.C. Dulles Intl Airport to London Southend Airport (IAD to SEN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to London Southend Airport

Fastest flight time	13h 50m
Direct flights	None

The fastest flight from Washington, D.C. Dulles Intl Airport to London Southend Airport takes 13h 50m

There are no direct flights from Washington, D.C. Dulles Intl Airport to London Southend Airport. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to London Southend Airport.

Search flight deals

How far is Washington, D.C. Dulles Intl to London Southend by plane?
There are 3709.0 mi between Washington, D.C. Dulles Intl and London Southend. Typically, this will take 13h 50m by plane in normal conditions.
When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to London Southend Airport?
Prices for flights from Washington, D.C. Dulles Intl Airport to London Southend Airport are updated daily.
How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to London Southend Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Dulles Intl Airport to London Southend Airport.
What documentation or ID do you need to fly to London Southend Airport?
The necessary travel and health documents for your London Southend Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

How do I get Price Alerts for flights from Washington, D.C. Dulles Intl Airport to London Southend Airport?
You can take advantage of momondo’s Price Alerts by first searching for your flights to Washington, D.C. Dulles Intl Airport from London Southend Airport. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.
How can I save money on flights from Washington, D.C. Dulles Intl Airport to London Southend Airport with momondo?
Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.
How does momondo find its flight prices?
We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Eastbourne

Milton Keynes

Luton

Gatwick

Slough

Maidstone

Southend-on-Sea

Canterbury

Ipswich

Ilford

Guildford

Chelmsford

Hayes

Wembley

Dover

Folkestone

Colchester

Bedford

Worthing

Ramsgate

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to London?

It is quick and easy to find Washington, D.C. to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from Washington, D.C. to London with flexible booking policies on momondo?

Flights from Washington, D.C. to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Washington, D.C. to London?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Washington, D.C..

I’m not ready to book a flight from Washington, D.C. to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.