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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 10/1. 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 round-trip flights

Logo
11:05 am - 7:30 pmSEN-IAD
13h 25m1 stop
Logo
9:20 pm - 8:50 pmIAD-SEN
18h 30m1 stop
$1,194
Find Deal
Mon, Oct 6 - Wed, Oct 15
Logo
8:05 pm - 8:50 pmSEN-IAD
53h 45m2 stops
Logo
9:20 pm - 8:50 pmIAD-SEN
18h 30m1 stop
$1,264
Find Deal
Mon, Oct 6 - Wed, Oct 15

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 September 10, 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

Mon 10/6

11:05 am-7:30 pm

1 stop13h 25m

Washington, D.C. Dulles Intl

Wed 10/15

9:20 pm-8:50 pm

1 stop18h 30m

$1,194

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Mon 10/6

8:05 pm-8:50 pm

2 stops53h 45m

Washington, D.C. Dulles Intl

Wed 10/15

9:20 pm-8:50 pm

1 stop18h 30m

$1,264

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Wed 10/1

5:30 pm-3:20 pm

3 stops26h 50m

$505

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 9/30

8:25 pm-3:20 pm

3 stops47h 55m

$506

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Mon 10/6

11:05 am-3:06 pm

3 stops33h 01m

$507

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 9/30

8:25 pm-3:20 pm

3 stops47h 55m

$508

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Fri 9/26

4:15 pm-2:25 pm

2 stops51h 10m

$510

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 9/30

8:25 pm-8:50 pm

2 stops29h 25m

$519

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Fri 9/26

4:15 pm-9:17 am

3 stops46h 02m

$525

LondonWashington, D.C.

SEN - IAD

SENIAD

London Southend

Tue 9/30

8:25 pm-3:20 pm

2 stops47h 55m

$528

Flights are sorted by cheapest round-trip 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?

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 $806. 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 $938.

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 at noon when prices are $869 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

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 25m.

  • 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
Gettysburg
National Harbor
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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