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Cheap flights from Washington, D.C. Dulles Intl Airport to London from £208

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 15/10. 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

Logo
19:40 - 20:50IAD-SEN
20h 10m2 stops
Logo
07:10 - 18:30SEN-IAD
16h 20m2 stops
£456
Find Deal
Sat, 15 Nov - Wed, 26 Nov
Logo
22:20 - 19:35IAD-SEN
16h 15m2 stops
Logo
20:25 - 15:20SEN-IAD
47h 55m3 stops
£553
Find Deal
Sun, 5 Oct - Tue, 14 Oct
Logo
19:40 - 17:15IAD-SEN
16h 35m2 stops
Logo
07:15 - 18:30SEN-IAD
16h 15m2 stops
£587
Find Deal
Wed, 26 Nov - Sat, 6 Dec
Logo
21:30 - 19:35IAD-SEN
18h 05m2 stops
Logo
07:15 - 20:26SEN-IAD
18h 11m2 stops
£594
Find Deal
Sat, 1 Nov - Sat, 8 Nov
Logo
18:50 - 20:10IAD-SEN
20h 20m2 stops
Logo
07:15 - 16:05SEN-IAD
13h 50m1 stop
£1,320
Find Deal
Sat, 27 Dec - Sat, 3 Jan
Logo
19:59 - 17:25IAD-SEN
16h 26m2 stops
Logo
08:00 - 17:35SEN-IAD
13h 35m1 stop
£1,553
Find Deal
Sat, 25 Oct - Fri, 31 Oct
Logo
18:30 - 17:25IAD-SEN
17h 55m1 stop
Logo
08:00 - 17:35SEN-IAD
13h 35m1 stop
£1,606
Find Deal
Sat, 25 Oct - Fri, 31 Oct

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 5 September 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 15/11

19:40-20:50

2 stops20h 10m

London Southend

Wed 26/11

07:10-18:30

2 stops16h 20m

£456

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sun 5/10

22:20-19:35

2 stops16h 15m

London Southend

Tue 14/10

20:25-15:20

3 stops47h 55m

£553

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 26/11

19:40-17:15

2 stops16h 35m

London Southend

Sat 6/12

07:15-18:30

2 stops16h 15m

£587

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sat 1/11

21:30-19:35

2 stops18h 05m

London Southend

Sat 8/11

07:15-20:26

2 stops18h 11m

£594

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sat 27/12

18:50-20:10

2 stops20h 20m

London Southend

Sat 3/1

07:15-16:05

1 stop13h 50m

£1,320

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sat 25/10

19:59-17:25

2 stops16h 26m

London Southend

Fri 31/10

08:00-17:35

1 stop13h 35m

£1,553

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sat 25/10

18:30-17:25

1 stop17h 55m

London Southend

Fri 31/10

08:00-17:35

1 stop13h 35m

£1,606

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 15/10

22:20-16:25

3 stops37h 05m

£208

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 12/11

22:30-12:30

3 stops33h 00m

£211

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 26/11

22:30-12:30

3 stops33h 00m

£211

Flights are sorted by cheapest return flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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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 16h 15m 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?

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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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