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Cheap flights from Washington, D.C. to London from $280

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 10/15. 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 Washington, D.C. to London

Cheap round-trip flights

Logo
10:05 pm - 4:40 pmIAD-SEN
13h 35m2 stops
Logo
7:15 am - 7:50 pmSEN-IAD
16h 35m3 stops
$737
Find Deal
Wed, Oct 22 - Sat, Nov 1
Logo
10:00 pm - 7:35 pmIAD-SEN
17h 35m2 stops
Logo
7:15 am - 7:30 pmSEN-IAD
17h 15m2 stops
$764
Find Deal
Thu, Oct 30 - Sat, Nov 8
Logo
8:40 pm - 5:15 pmBWI-SEN
16h 35m2 stops
Logo
7:35 am - 6:40 pmSEN-BWI
16h 05m2 stops
$764
Find Deal
Wed, Oct 29 - Tue, Nov 4
Logo
9:30 pm - 7:35 pmIAD-SEN
18h 05m2 stops
Logo
7:15 am - 6:50 pmSEN-IAD
16h 35m3 stops
$766
Find Deal
Thu, Oct 30 - Sat, Nov 8
Logo
5:20 pm - 4:40 pmIAD-SEN
18h 20m2 stops
Logo
7:15 am - 8:30 pmSEN-IAD
17h 15m2 stops
$770
Find Deal
Wed, Oct 22 - Sat, Nov 1
Logo
8:30 pm - 3:45 pmBWI-SEN
14h 15m2 stops
Logo
8:00 am - 7:40 pmSEN-BWI
15h 40m2 stops
$770
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Thu, Oct 23 - Fri, Oct 31
Logo
10:05 pm - 7:35 pmIAD-SEN
16h 30m2 stops
Logo
7:15 am - 7:50 pmSEN-IAD
16h 35m3 stops
$774
Find Deal
Thu, Oct 23 - Sat, Nov 1
Logo
8:40 pm - 5:15 pmIAD-SEN
16h 35m2 stops
Logo
7:35 am - 6:30 pmSEN-IAD
15h 55m2 stops
$781
Find Deal
Wed, Oct 29 - Tue, Nov 4
Logo
10:05 pm - 11:20 pmIAD-SEN
20h 15m2 stops
Logo
8:35 pm - 7:59 pmSEN-IAD
28h 24m2 stops
$815
Find Deal
Sat, Sep 27 - Thu, Oct 2
Logo
10:25 pm - 7:40 pmIAD-SEN
17h 15m2 stops
Logo
7:35 am - 4:05 pmSEN-IAD
13h 30m1 stop
$865
Find Deal
Tue, Oct 28 - Fri, Nov 7

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 September 11, 2025.
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

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 10/22

10:05 pm-4:40 pm

2 stops13h 35m

London Southend

Sat 11/1

7:15 am-7:50 pm

3 stops16h 35m

$737

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Thu 10/30

10:00 pm-7:35 pm

2 stops17h 35m

London Southend

Sat 11/8

7:15 am-7:30 pm

2 stops17h 15m

$764

BaltimoreLondon

BWI - SEN

BWISEN

Baltimore/Washington

Wed 10/29

8:40 pm-5:15 pm

2 stops16h 35m

London Southend

Tue 11/4

7:35 am-6:40 pm

2 stops16h 05m

$764

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Thu 10/30

9:30 pm-7:35 pm

2 stops18h 05m

London Southend

Sat 11/8

7:15 am-6:50 pm

3 stops16h 35m

$766

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 10/22

5:20 pm-4:40 pm

2 stops18h 20m

London Southend

Sat 11/1

7:15 am-8:30 pm

2 stops17h 15m

$770

BaltimoreLondon

BWI - SEN

BWISEN

Baltimore/Washington

Thu 10/23

8:30 pm-3:45 pm

2 stops14h 15m

London Southend

Fri 10/31

8:00 am-7:40 pm

2 stops15h 40m

$770

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Thu 10/23

10:05 pm-7:35 pm

2 stops16h 30m

London Southend

Sat 11/1

7:15 am-7:50 pm

3 stops16h 35m

$774

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Wed 10/29

8:40 pm-5:15 pm

2 stops16h 35m

London Southend

Tue 11/4

7:35 am-6:30 pm

2 stops15h 55m

$781

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Sat 9/27

10:05 pm-11:20 pm

2 stops20h 15m

London Southend

Thu 10/2

8:35 pm-7:59 pm

2 stops28h 24m

$815

Washington, D.C.London

IAD - SEN

IADSEN

Washington, D.C. Dulles Intl

Tue 10/28

10:25 pm-7:40 pm

2 stops17h 15m

London Southend

Fri 11/7

7:35 am-4:05 pm

1 stop13h 30m

$865

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 05m 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 15m. 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

Direct flights

None
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.
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  • 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 13h 35m.

  • 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
Dover
Luton
Slough
Milton Keynes
Hayes
Guildford
Dartford
Crawley
Stansted
Chelmsford
Brentwood
Ilford
Folkestone
Colchester
Watford
Richmond
Canterbury
Wembley

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

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