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Cheap flights from Washington, D.C. Dulles Intl Airport to London from £224

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to London departing on 7/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to London

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
22:55 - 20:15IAD-SEN
16h 20m2 stops
Multiple Airlines Logo
06:50 - 20:59SEN-IAD
19h 09m2 stops
£518Multiple Airlines
Find Deal
Sat, 29 Nov - Thu, 11 Dec
Multiple Airlines Logo
19:40 - 14:50IAD-SEN
14h 10m2 stops
Multiple Airlines Logo
07:15 - 18:30SEN-IAD
16h 15m2 stops
£527Multiple Airlines
Find Deal
Sun, 15 Feb - Sat, 21 Feb
Multiple Airlines Logo
19:40 - 14:50IAD-SEN
14h 10m2 stops
Multiple Airlines Logo
07:15 - 18:30SEN-IAD
16h 15m2 stops
£576Multiple Airlines
Find Deal
Sun, 30 Nov - Sat, 6 Dec
Multiple Airlines Logo
20:30 - 20:50IAD-SEN
19h 20m2 stops
Multiple Airlines Logo
07:15 - 17:15SEN-IAD
15h 00m2 stops
£585Multiple Airlines
Find Deal
Sat, 10 Jan - Mon, 12 Jan
Multiple Airlines Logo
21:05 - 22:25IAD-SEN
20h 20m2 stops
Multiple Airlines Logo
20:50 - 15:05SEN-IAD
47h 15m3 stops
£590Multiple Airlines
Find Deal
Sun, 29 Mar - Fri, 10 Apr
Multiple Airlines Logo
09:45 - 10:30IAD-SEN
19h 45m2 stops
Multiple Airlines Logo
07:10 - 20:05SEN-IAD
17h 55m2 stops
£632Multiple Airlines
Find Deal
Sun, 23 Nov - Wed, 26 Nov
Multiple Airlines Logo
19:40 - 20:10IAD-SEN
19h 30m2 stops
Multiple Airlines Logo
07:15 - 18:30SEN-IAD
16h 15m2 stops
£719Multiple Airlines
Find Deal
Sat, 13 Dec - Sat, 20 Dec
Multiple Airlines Logo
16:30 - 14:50IAD-SEN
17h 20m2 stops
Multiple Airlines Logo
06:40 - 15:50SEN-IAD
14h 10m2 stops
£727Multiple Airlines
Find Deal
Sun, 23 Nov - Fri, 28 Nov
Multiple Airlines Logo
18:00 - 14:50IAD-SEN
15h 50m2 stops
Multiple Airlines Logo
06:40 - 15:50SEN-IAD
14h 10m2 stops
£742Multiple Airlines
Find Deal
Sun, 23 Nov - Fri, 28 Nov
Multiple Airlines Logo
18:05 - 10:00IAD-SEN
10h 55m1 stop
Multiple Airlines Logo
06:40 - 16:05SEN-IAD
14h 25m1 stop
£768Multiple Airlines
Find Deal
Fri, 12 Dec - Fri, 19 Dec

momondo Fare Finder

 
Customise your flight search to find flights from Washington, D.C. Dulles Intl Airport to London Southend Airport 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, momondo users made 279,928 searches. Data last updated 29 October 2025.
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

Sat 29/11

22:55-20:15

2 stops16h 20m

London Southend

Thu 11/12

06:50-20:59

2 stops19h 09m

£518

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sun 15/2

19:40-14:50

2 stops14h 10m

London Southend

Sat 21/2

07:15-18:30

2 stops16h 15m

£527

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sun 30/11

19:40-14:50

2 stops14h 10m

London Southend

Sat 6/12

07:15-18:30

2 stops16h 15m

£576

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sat 10/1

20:30-20:50

2 stops19h 20m

London Southend

Mon 12/1

07:15-17:15

2 stops15h 00m

£585

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sun 29/3

21:05-22:25

2 stops20h 20m

London Southend

Fri 10/4

20:50-15:05

3 stops47h 15m

£590

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sun 23/11

09:45-10:30

2 stops19h 45m

London Southend

Wed 26/11

07:10-20:05

2 stops17h 55m

£632

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sat 13/12

19:40-20:10

2 stops19h 30m

London Southend

Sat 20/12

07:15-18:30

2 stops16h 15m

£719

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sun 23/11

16:30-14:50

2 stops17h 20m

London Southend

Fri 28/11

06:40-15:50

2 stops14h 10m

£727

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sun 23/11

18:00-14:50

2 stops15h 50m

London Southend

Fri 28/11

06:40-15:50

2 stops14h 10m

£742

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Fri 12/12

18:05-10:00

1 stop10h 55m

London Southend

Fri 19/12

06:40-16:05

1 stop14h 25m

£768

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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

Direct flights

None
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.
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  • 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 10h 55m 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.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
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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.

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