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Cheap flights from London Southend Airport to Washington, D.C. from $505

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 11/13. 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 round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:10 am - 6:30 pmSEN-IAD
16h 20m2 stops
Multiple Airlines Logo
7:40 pm - 9:00 pmIAD-SEN
20h 20m2 stops
$646Multiple Airlines
Find Deal
Wed, Nov 26 - Wed, Dec 3
Multiple Airlines Logo
7:10 am - 6:30 pmSEN-IAD
16h 20m2 stops
Multiple Airlines Logo
7:40 pm - 8:50 pmIAD-SEN
20h 10m2 stops
$702Multiple Airlines
Find Deal
Wed, Dec 10 - Sat, Dec 13
Multiple Airlines Logo
6:50 am - 9:00 pmSEN-IAD
43h 10m3 stops
Multiple Airlines Logo
5:30 pm - 8:15 pmIAD-SEN
21h 45m2 stops
$704Multiple Airlines
Find Deal
Thu, Nov 20 - Sat, Nov 29
Multiple Airlines Logo
7:10 am - 9:00 pmSEN-IAD
18h 50m2 stops
Multiple Airlines Logo
5:30 pm - 7:45 pmIAD-SEN
21h 15m2 stops
$734Multiple Airlines
Find Deal
Sun, Feb 1 - Mon, Feb 16
Multiple Airlines Logo
6:30 am - 9:00 pmSEN-IAD
43h 30m3 stops
Multiple Airlines Logo
5:30 pm - 11:05 pmIAD-SEN
24h 35m3 stops
$783Multiple Airlines
Find Deal
Thu, Feb 5 - Tue, Feb 17
Multiple Airlines Logo
6:00 am - 9:00 pmSEN-IAD
44h 00m3 stops
Multiple Airlines Logo
10:55 pm - 8:10 pmIAD-SEN
16h 15m2 stops
$1,002Multiple Airlines
Find Deal
Thu, Dec 18 - Sat, Dec 27
Multiple Airlines Logo
6:40 am - 4:05 pmSEN-IAD
14h 25m1 stop
Multiple Airlines Logo
6:05 pm - 2:50 pmIAD-SEN
15h 45m1 stop
$1,206Multiple Airlines
Find Deal
Fri, Dec 26 - Sun, Jan 4
Multiple Airlines Logo
6:05 pm - 3:35 pmSEN-IAD
26h 30m2 stops
Multiple Airlines Logo
6:50 pm - 10:30 amIAD-SEN
10h 40m1 stop
$1,272Multiple Airlines
Find Deal
Sun, Nov 30 - Sun, Dec 7
Multiple Airlines Logo
7:10 am - 7:30 pmSEN-IAD
17h 20m2 stops
Multiple Airlines Logo
5:05 pm - 12:50 pmIAD-SEN
14h 45m2 stops
$1,344Multiple Airlines
Find Deal
Wed, Dec 3 - Thu, Dec 18
Multiple Airlines Logo
6:40 am - 4:05 pmSEN-IAD
14h 25m1 stop
Multiple Airlines Logo
6:05 pm - 10:00 amIAD-SEN
10h 55m1 stop
$1,391Multiple Airlines
Find Deal
Fri, Dec 19 - Fri, Jan 2

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated October 16, 2025.
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

Wed 11/26

7:10 am-6:30 pm

2 stops16h 20m

Washington, D.C. Dulles Intl

Wed 12/3

7:40 pm-9:00 pm

2 stops20h 20m

$646

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Wed 12/10

7:10 am-6:30 pm

2 stops16h 20m

Washington, D.C. Dulles Intl

Sat 12/13

7:40 pm-8:50 pm

2 stops20h 10m

$702

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Thu 11/20

6:50 am-9:00 pm

3 stops43h 10m

Washington, D.C. Dulles Intl

Sat 11/29

5:30 pm-8:15 pm

2 stops21h 45m

$704

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sun 2/1

7:10 am-9:00 pm

2 stops18h 50m

Washington, D.C. Dulles Intl

Mon 2/16

5:30 pm-7:45 pm

2 stops21h 15m

$734

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Thu 2/5

6:30 am-9:00 pm

3 stops43h 30m

Washington, D.C. Dulles Intl

Tue 2/17

5:30 pm-11:05 pm

3 stops24h 35m

$783

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Thu 12/18

6:00 am-9:00 pm

3 stops44h 00m

Washington, D.C. Dulles Intl

Sat 12/27

10:55 pm-8:10 pm

2 stops16h 15m

$1,002

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Fri 12/26

6:40 am-4:05 pm

1 stop14h 25m

Washington, D.C. Dulles Intl

Sun 1/4

6:05 pm-2:50 pm

1 stop15h 45m

$1,206

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Sun 11/30

6:05 pm-3:35 pm

2 stops26h 30m

Washington, D.C. Dulles Intl

Sun 12/7

6:50 pm-10:30 am

1 stop10h 40m

$1,272

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Wed 12/3

7:10 am-7:30 pm

2 stops17h 20m

Washington, D.C. Dulles Intl

Thu 12/18

5:05 pm-12:50 pm

2 stops14h 45m

$1,344

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Fri 12/19

6:40 am-4:05 pm

1 stop14h 25m

Washington, D.C. Dulles Intl

Fri 1/2

6:05 pm-10:00 am

1 stop10h 55m

$1,391

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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?

Our data shows that Thursday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $795. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London Southend Airport to Washington, D.C. Dulles Intl Airport for around $947.

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

Flying to Washington, D.C. Dulles Intl Airport from London Southend Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $743 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $871 on average. Flights to Washington, D.C. Dulles Intl Airport from London Southend Airport in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 round-trip 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

Direct flights

None
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?

    London Southend and Washington, D.C. Dulles Intl are 3709.0 mi apart from one another. A reasonable flight in good conditions will take 13h 50m.

  • 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?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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.

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Harpers Ferry
Towson
Rockville
Manassas
Reston
Fairfax
Gaithersburg
Glen Burnie

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from London.

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

Flights from London to Washington, D.C. 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 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.

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