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Cheap flights from London Southend Airport to Washington, D.C. from £441

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Southend Airport to Washington, D.C. departing on 18/1. 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 London Southend Airport to Washington, D.C.

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
07:10 - 18:07
SEN
-
IAD
39h 57m2 stops
Multiple Airlines Logo
18:50 - 10:30
IAD
-
SEN
10h 40m1 stop
£851Multiple Airlines
Sun, 22 Feb - Sun, 1 Mar
Multiple Airlines Logo
18:05 - 16:35
SEN
-
IAD
27h 30m1 stop
Multiple Airlines Logo
18:50 - 10:30
IAD
-
SEN
10h 40m1 stop
£1,851Multiple Airlines
Sun, 22 Feb - Sun, 1 Mar

momondo Fare Finder

 
Customise your flight search to find flights from London Southend Airport to Washington, D.C. Dulles Intl 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 9 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

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sun 22/2

07:10-18:07

2 stops39h 57m

Washington, D.C. Dulles Intl

Sun 1/3

18:50-10:30

1 stop10h 40m

£851

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sun 22/2

18:05-16:35

1 stop27h 30m

Washington, D.C. Dulles Intl

Sun 1/3

18:50-10:30

1 stop10h 40m

£1,851

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sun 18/1

07:10-15:15

3 stops37h 05m

£441

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Wed 4/2

07:10-16:24

2 stops14h 14m

£456

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Mon 26/1

07:20-18:30

2 stops16h 10m

£457

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sun 22/3

07:10-19:45

2 stops16h 35m

£464

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Fri 16/1

07:35-21:00

2 stops18h 25m

£482

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Mon 26/1

12:20-11:45

3 stops28h 25m

£486

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 7/7

06:20-19:00

2 stops17h 40m

£489

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 7/7

06:20-19:00

2 stops17h 40m

£490

Flights are sorted by cheapest return flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from London Southend Airport to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

According to our data, Thursday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from London Southend Airport. The lowest ticket price found for a Thursday departure recently was £585. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Sunday is the most expensive day to depart from London Southend Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £636.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

The cheapest time of day to fly to Washington, D.C. Dulles Intl Airport is at midday when flights can be purchased for as low as £594. In contrast, the most expensive time of day to depart to Washington, D.C. Dulles Intl Airport is in the afternoon when prices are around £604.

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

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

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

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

Fastest flight time

17h 05m

Direct flights

None
The fastest flight from London Southend Airport to Washington, D.C. Dulles Intl Airport takes 17h 05m
There are no direct flights from London Southend Airport to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from London Southend Airport to Washington, D.C. Dulles Intl Airport.
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  • How far is London Southend to Washington, D.C. Dulles Intl by plane?

    A flight from London Southend to Washington, D.C. Dulles Intl will travel around 3709.0 mi. 17h 05m is a normal flight duration for this route.

  • When did momondo last update prices for flights from London Southend Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from London Southend Airport to Washington, D.C. Dulles Intl Airport are updated daily.

  • How old do you have to be to fly from London Southend Airport to Washington, D.C. Dulles Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Southend Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents you'll need for your trip to Washington, D.C. Dulles Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Laurel
College Park
Alexandria
Fairfax
Arlington
Linthicum Heights
Bethesda
Glen Burnie
Lutherville Timonium
Front Royal
Winchester
Ellicott City
Cambridge
Westminster
Woodbridge
Ashburn
Sterling
Silver Spring
Owings Mills
National Harbor

Why use momondo?

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

It is quick and easy to find London to Washington, D.C. 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 Washington, D.C. that suits you.

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

Yes. All flights to Washington, D.C. from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo helps you find the best flight between London and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from London and alert you when they change.

An easier way to manage your Washington, D.C. Dulles Intl Airport trip

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