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Cheap flights from London Southend Airport to Washington, D.C. from $439

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 9/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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
4:55 pm - 5:00 pm
SEN
-
IAD
29h 05m
2 stops
Multiple Airlines Logo
8:20 pm - 7:35 pm
IAD
-
SEN
18h 15m
2 stops
$1,009Multiple Airlines
Fri, Sep 11 - Sat, Sep 19
Multiple Airlines Logo
4:00 pm - 7:00 pm
SEN
-
IAD
32h 00m
2 stops
Multiple Airlines Logo
8:30 pm - 4:40 pm
IAD
-
SEN
15h 10m
2 stops
$1,061Multiple Airlines
Mon, Jul 13 - Wed, Jul 15
Multiple Airlines Logo
6:30 am - 7:00 pm
SEN
-
IAD
17h 30m
2 stops
Multiple Airlines Logo
9:00 pm - 10:25 pm
IAD
-
SEN
20h 25m
2 stops
$1,063Multiple Airlines
Fri, Jul 17 - Sun, Jul 19
Multiple Airlines Logo
4:00 pm - 7:00 pm
SEN
-
IAD
32h 00m
2 stops
Multiple Airlines Logo
8:30 pm - 4:40 pm
IAD
-
SEN
15h 10m
2 stops
$1,067Multiple Airlines
Mon, Jul 13 - Wed, Jul 15
Multiple Airlines Logo
4:00 pm - 7:00 pm
SEN
-
IAD
32h 00m
2 stops
Multiple Airlines Logo
8:30 pm - 4:40 pm
IAD
-
SEN
15h 10m
2 stops
$1,080Multiple Airlines
Mon, Jul 13 - Wed, Jul 15
Multiple Airlines Logo
10:10 am - 7:35 pm
SEN
-
IAD
14h 25m
1 stop
Multiple Airlines Logo
6:15 pm - 10:45 am
IAD
-
SEN
11h 30m
1 stop
$1,116Multiple Airlines
Thu, Sep 3 - Thu, Sep 17
Multiple Airlines Logo
4:35 pm - 3:10 pm
SEN
-
IAD
27h 35m
2 stops
Multiple Airlines Logo
9:45 pm - 4:40 pm
IAD
-
SEN
13h 55m
1 stop
$1,123Multiple Airlines
Thu, Aug 20 - Wed, Aug 26
Multiple Airlines Logo
6:30 am - 7:00 pm
SEN
-
IAD
17h 30m
2 stops
Multiple Airlines Logo
8:30 pm - 4:40 pm
IAD
-
SEN
15h 10m
2 stops
$1,156Multiple Airlines
Tue, Jul 14 - Wed, Jul 15
Multiple Airlines Logo
4:35 pm - 3:10 pm
SEN
-
IAD
27h 35m
2 stops
Multiple Airlines Logo
6:15 pm - 10:45 am
IAD
-
SEN
11h 30m
1 stop
$1,205Multiple Airlines
Thu, Aug 20 - Thu, Aug 27
Multiple Airlines Logo
4:35 pm - 3:10 pm
SEN
-
IAD
27h 35m
2 stops
Multiple Airlines Logo
6:15 pm - 10:45 am
IAD
-
SEN
11h 30m
1 stop
$1,206Multiple Airlines
Thu, Aug 20 - Thu, Aug 27

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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 July 9, 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

Cheapest round-trip

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Fri 9/11

4:55 pm-5:00 pm

2 stops29h 05m

Washington, D.C. Dulles Intl

Sat 9/19

8:20 pm-7:35 pm

2 stops18h 15m

$1,009

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Mon 7/13

4:00 pm-7:00 pm

2 stops32h 00m

Washington, D.C. Dulles Intl

Wed 7/15

8:30 pm-4:40 pm

2 stops15h 10m

$1,061

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Fri 7/17

6:30 am-7:00 pm

2 stops17h 30m

Washington, D.C. Dulles Intl

Sun 7/19

9:00 pm-10:25 pm

2 stops20h 25m

$1,063

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Mon 7/13

4:00 pm-7:00 pm

2 stops32h 00m

Washington, D.C. Dulles Intl

Wed 7/15

8:30 pm-4:40 pm

2 stops15h 10m

$1,067

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Mon 7/13

4:00 pm-7:00 pm

2 stops32h 00m

Washington, D.C. Dulles Intl

Wed 7/15

8:30 pm-4:40 pm

2 stops15h 10m

$1,080
Quickest round-trip

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Thu 9/3

10:10 am-7:35 pm

1 stop14h 25m

Washington, D.C. Dulles Intl

Thu 9/17

6:15 pm-10:45 am

1 stop11h 30m

$1,116

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Thu 8/20

4:35 pm-3:10 pm

2 stops27h 35m

Washington, D.C. Dulles Intl

Wed 8/26

9:45 pm-4:40 pm

1 stop13h 55m

$1,123

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 7/14

6:30 am-7:00 pm

2 stops17h 30m

Washington, D.C. Dulles Intl

Wed 7/15

8:30 pm-4:40 pm

2 stops15h 10m

$1,156

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Thu 8/20

4:35 pm-3:10 pm

2 stops27h 35m

Washington, D.C. Dulles Intl

Thu 8/27

6:15 pm-10:45 am

1 stop11h 30m

$1,205

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Thu 8/20

4:35 pm-3:10 pm

2 stops27h 35m

Washington, D.C. Dulles Intl

Thu 8/27

6:15 pm-10:45 am

1 stop11h 30m

$1,206

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 $744. 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 $908.

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 afternoon is the least expensive time of day to depart. momondo users have found prices as low as $790 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $807 on average. Flights to Washington, D.C. Dulles Intl Airport from London Southend Airport at noon 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

Fastest flight time

17h 30m

Direct flights

None
The fastest flight from London Southend Airport to Washington, D.C. Dulles Intl Airport takes 17h 30m
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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Frequently asked questions about flying from London Southend Airport to Washington, D.C. Dulles Intl Airport

  • 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 17h 30m.

  • 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
Arlington
Gettysburg
Winchester
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Linthicum Heights
Rockville
Colonial Beach
Towson
Manassas
Silver Spring
Sterling
Tysons
Springfield
Fairfax

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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