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Cheap flights from Washington, D.C. to London from $347

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. to London departing on 4/14. 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

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Find the cheapest flights from Washington, D.C. to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:25 pm - 8:10 pm
IAD
-
SEN
21h 45m
2 stops
Multiple Airlines Logo
8:40 pm - 7:25 pm
SEN
-
IAD
27h 45m
3 stops
$716Multiple Airlines
Wed, Apr 8 - Fri, Apr 17
Multiple Airlines Logo
1:20 pm - 10:25 pm
IAD
-
SEN
28h 05m
2 stops
Multiple Airlines Logo
7:00 am - 11:35 am
SEN
-
IAD
33h 35m
2 stops
$765Multiple Airlines
Thu, Apr 30 - Mon, May 4
Multiple Airlines Logo
8:20 pm - 11:20 pm
IAD
-
SEN
22h 00m
2 stops
Multiple Airlines Logo
8:25 pm - 5:00 pm
SEN
-
IAD
25h 35m
2 stops
$772Multiple Airlines
Sat, Apr 25 - Tue, Apr 28
Multiple Airlines Logo
8:30 pm - 9:25 pm
IAD
-
SEN
19h 55m
2 stops
Multiple Airlines Logo
6:30 am - 8:35 pm
SEN
-
IAD
19h 05m
2 stops
$836Multiple Airlines
Wed, Apr 22 - Tue, May 5
Multiple Airlines Logo
5:15 pm - 9:25 pm
IAD
-
SEN
23h 10m
2 stops
Multiple Airlines Logo
6:30 am - 8:35 pm
SEN
-
IAD
19h 05m
2 stops
$885Multiple Airlines
Wed, Sep 9 - Tue, Sep 15
Multiple Airlines Logo
3:25 pm - 12:25 pm
IAD
-
SEN
16h 00m
2 stops
Multiple Airlines Logo
11:00 am - 3:45 pm
SEN
-
IAD
33h 45m
2 stops
$1,131Multiple Airlines
Sun, Aug 2 - Sun, Aug 9
Multiple Airlines Logo
3:25 pm - 12:25 pm
IAD
-
SEN
16h 00m
2 stops
Multiple Airlines Logo
11:00 am - 3:45 pm
SEN
-
IAD
33h 45m
2 stops
$1,179Multiple Airlines
Sun, Aug 2 - Sun, Aug 9
Multiple Airlines Logo
6:15 pm - 10:45 am
IAD
-
SEN
11h 30m
1 stop
Multiple Airlines Logo
10:10 am - 7:35 pm
SEN
-
IAD
14h 25m
1 stop
$1,240Multiple Airlines
Thu, Apr 23 - Thu, Apr 30
Multiple Airlines Logo
1:32 pm - 10:45 am
IAD
-
SEN
16h 13m
2 stops
Multiple Airlines Logo
10:10 am - 7:35 pm
SEN
-
IAD
14h 25m
1 stop
$1,243Multiple Airlines
Thu, May 7 - Thu, May 14
Multiple Airlines Logo
6:15 pm - 10:45 am
IAD
-
SEN
11h 30m
1 stop
Multiple Airlines Logo
10:10 am - 7:35 pm
SEN
-
IAD
14h 25m
1 stop
$1,258Multiple Airlines
Thu, May 7 - Thu, May 14

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 832,500 searches. Data last updated March 28, 2026.
Use the filters below to find and compare flights from Washington, D.C. to London Southend Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 4/8

5:25 pm-8:10 pm

2 stops21h 45m

London Southend

Fri 4/17

8:40 pm-7:25 pm

3 stops27h 45m

$716

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Thu 4/30

1:20 pm-10:25 pm

2 stops28h 05m

London Southend

Mon 5/4

7:00 am-11:35 am

2 stops33h 35m

$765

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sat 4/25

8:20 pm-11:20 pm

2 stops22h 00m

London Southend

Tue 4/28

8:25 pm-5:00 pm

2 stops25h 35m

$772

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 4/22

8:30 pm-9:25 pm

2 stops19h 55m

London Southend

Tue 5/5

6:30 am-8:35 pm

2 stops19h 05m

$836

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 9/9

5:15 pm-9:25 pm

2 stops23h 10m

London Southend

Tue 9/15

6:30 am-8:35 pm

2 stops19h 05m

$885

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sun 8/2

3:25 pm-12:25 pm

2 stops16h 00m

London Southend

Sun 8/9

11:00 am-3:45 pm

2 stops33h 45m

$1,131

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sun 8/2

3:25 pm-12:25 pm

2 stops16h 00m

London Southend

Sun 8/9

11:00 am-3:45 pm

2 stops33h 45m

$1,179
Quickest round-trip

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Thu 4/23

6:15 pm-10:45 am

1 stop11h 30m

London Southend

Thu 4/30

10:10 am-7:35 pm

1 stop14h 25m

$1,240

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Thu 5/7

1:32 pm-10:45 am

2 stops16h 13m

London Southend

Thu 5/14

10:10 am-7:35 pm

1 stop14h 25m

$1,243

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Thu 5/7

6:15 pm-10:45 am

1 stop11h 30m

London Southend

Thu 5/14

10:10 am-7:35 pm

1 stop14h 25m

$1,258

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 London from

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

How long does it take to fly to London Southend Airport?

Flight times from Washington, D.C. to London Southend Airport vary, but if you’re flying out of Baltimore and flying into London Heathrow Airport (one of the most popular routes), then the duration is 7h 20m on average. Another popular route from Washington, D.C. to London Southend Airport is flying from Washington, D.C. to London Heathrow Airport, which will take roughly 8h 21m. Keep in mind that layovers or delays could extend your travel time.

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

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

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

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

Fastest flight time

11h 15m

Direct flights

None
The fastest flight from Washington, D.C. to London Southend Airport takes 11h 15m
There are no direct flights from Washington, D.C. to London Southend Airport. There are no popular flight routes from Washington, D.C. to London Southend Airport.
Search flight deals

  • How far is Washington, D.C. to London Southend by plane?

    The straight-line distance from Washington, D.C. to London Southend is 3694.1 mi. A reasonable flight in good conditions will take 11h 15m.

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

    Prices for flights from Washington, D.C. to London Southend Airport were last updated today.

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

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Luton
Dover
Crawley
Slough
Wembley
Hayes
Croydon
Dartford
Brentwood
Guildford
Harrow
Cobham
Folkestone
Romford
Stansted
Watford
Richmond

Why use momondo?

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

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 London from Washington, D.C..

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

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

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

Once all potential Washington, D.C. to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to London from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your London Southend Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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