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Cheap flights from Washington, D.C. to London from $317

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 5/18. 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
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
8:55 pm - 5:25 pm
IAD
-
LTN
15h 30m
1 stop
Multiple Airlines Logo
1:10 pm - 7:35 pm
LTN
-
IAD
11h 25m
1 stop
$647Multiple Airlines
Fri, May 8 - Tue, May 12
Multiple Airlines Logo
5:05 pm - 1:45 pm
IAD
-
LTN
15h 40m
2 stops
Multiple Airlines Logo
8:00 am - 3:10 pm
LTN
-
IAD
36h 10m
2 stops
$653Multiple Airlines
Tue, Apr 14 - Thu, Apr 30
Multiple Airlines Logo
5:15 pm - 9:15 am
IAD
-
LTN
11h 00m
1 stop
Multiple Airlines Logo
8:15 am - 3:45 pm
LTN
-
IAD
12h 30m
1 stop
$658Multiple Airlines
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
8:55 pm - 3:45 pm
IAD
-
LTN
13h 50m
1 stop
Multiple Airlines Logo
8:15 am - 3:45 pm
LTN
-
IAD
12h 30m
1 stop
$659Multiple Airlines
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
5:15 pm - 5:25 pm
IAD
-
LTN
19h 10m
1 stop
Multiple Airlines Logo
1:00 pm - 7:10 pm
LTN
-
IAD
11h 10m
1 stop
$660Multiple Airlines
Fri, May 1 - Thu, May 7
Multiple Airlines Logo
8:55 pm - 3:45 pm
IAD
-
LTN
13h 50m
1 stop
Multiple Airlines Logo
8:15 am - 3:45 pm
LTN
-
IAD
12h 30m
1 stop
$662Multiple Airlines
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
9:05 pm - 1:25 pm
IAD
-
LTN
11h 20m
1 stop
Multiple Airlines Logo
1:10 pm - 7:35 pm
LTN
-
IAD
11h 25m
1 stop
$666Multiple Airlines
Tue, Sep 8 - Tue, Sep 15
Multiple Airlines Logo
5:15 pm - 9:15 am
IAD
-
LTN
11h 00m
1 stop
Multiple Airlines Logo
6:15 am - 3:45 pm
LTN
-
IAD
14h 30m
1 stop
$667Multiple Airlines
Mon, Sep 7 - Wed, Sep 16
Multiple Airlines Logo
8:30 pm - 1:15 pm
BWI
-
LTN
11h 45m
1 stop
Multiple Airlines Logo
6:15 am - 7:25 pm
LTN
-
BWI
18h 10m
1 stop
$668Multiple Airlines
Sat, May 16 - Wed, May 20
Multiple Airlines Logo
9:05 pm - 1:25 pm
IAD
-
LTN
11h 20m
1 stop
Multiple Airlines Logo
8:15 am - 3:45 pm
LTN
-
IAD
12h 30m
1 stop
$668Multiple Airlines
Tue, Sep 8 - Mon, Sep 14

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to London Luton 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 24, 2026.
Use the filters below to find and compare flights from Washington, D.C. to London Luton Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Fri 5/8

8:55 pm-5:25 pm

1 stop15h 30m

London Luton

Tue 5/12

1:10 pm-7:35 pm

1 stop11h 25m

$647

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Tue 4/14

5:05 pm-1:45 pm

2 stops15h 40m

London Luton

Thu 4/30

8:00 am-3:10 pm

2 stops36h 10m

$653

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Mon 5/4

5:15 pm-9:15 am

1 stop11h 00m

London Luton

Mon 5/11

8:15 am-3:45 pm

1 stop12h 30m

$658

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Mon 5/4

8:55 pm-3:45 pm

1 stop13h 50m

London Luton

Mon 5/11

8:15 am-3:45 pm

1 stop12h 30m

$659

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Fri 5/1

5:15 pm-5:25 pm

1 stop19h 10m

London Luton

Thu 5/7

1:00 pm-7:10 pm

1 stop11h 10m

$660

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Mon 5/4

8:55 pm-3:45 pm

1 stop13h 50m

London Luton

Mon 5/11

8:15 am-3:45 pm

1 stop12h 30m

$662
Quickest round-trip

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Tue 9/8

9:05 pm-1:25 pm

1 stop11h 20m

London Luton

Tue 9/15

1:10 pm-7:35 pm

1 stop11h 25m

$666

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Mon 9/7

5:15 pm-9:15 am

1 stop11h 00m

London Luton

Wed 9/16

6:15 am-3:45 pm

1 stop14h 30m

$667

BaltimoreLondon

BWI - LTN

BWILTN

Baltimore/Washington

Sat 5/16

8:30 pm-1:15 pm

1 stop11h 45m

London Luton

Wed 5/20

6:15 am-7:25 pm

1 stop18h 10m

$668

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Tue 9/8

9:05 pm-1:25 pm

1 stop11h 20m

London Luton

Mon 9/14

8:15 am-3:45 pm

1 stop12h 30m

$668

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 Luton 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 often are flights from Washington, D.C. to London delayed?

Historically, on average around 25% of flights between Washington, D.C. and London have experienced a delay on any given week. The average delay length over the past 12 months has been 21 minutes.

What is the most punctual flight time for Washington, D.C. to London flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Monday has historically seen more delays on average compared to the rest of the week.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to London Luton 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 Luton Airport (WAS to LTN) flight deals and tips

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

Fastest flight time

10h 05m

Direct flights

None
The fastest flight from Washington, D.C. to London Luton Airport takes 10h 05m
There are no direct flights from Washington, D.C. to London Luton Airport. There are no popular flight routes from Washington, D.C. to London Luton Airport.
Search flight deals

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

    London Luton is 3644.3 mi away from Washington, D.C.. A reasonable flight in good conditions will take 10h 05m.

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

    Prices for flights from Washington, D.C. to London Luton Airport are refreshed on a daily basis.

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to London Luton Airport.

  • What documentation or ID do you need to fly to London Luton Airport?

    The travel and health documents you'll need for your trip to London Luton 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 London Luton Airport. It is always advisable to seek 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
Slough
Crawley
Wembley
Hayes
Dartford
Croydon
Harrow
Watford
Brentwood
Guildford
Stansted
Cobham
Folkestone
Romford
Richmond

Why use momondo?

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

It is quick and easy to find Washington, D.C. to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

Flights from Washington, D.C. to London 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 Washington, D.C. to London?

momondo provides multiple filters to help you find the best flight to London from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Washington, D.C. and alert you when they change.

An easier way to manage your London Luton Airport trip

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