$607 Cheap Flights from Washington (DCA) to Londonderry (LDY)

View $607 flight on Wed, Oct 15, 2025Opens in a new window

Popular airlines from Ronald Reagan Washington National Airport (DCA) to Londonderry (LDY-City of Derry)

Cheap Flights from Washington to Londonderry (DCA-LDY)

Prices were available within the past 7 days and start at $607 for one-way flights and $1,064 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Oct 15 - Wed, Oct 22
DCA
Washington
LDY
Londonderry
$1,064 Roundtrip, found 6 hours ago
$1,064
Roundtrip
found 6 hours ago
Select United flight, departing Wed, Oct 15 from Washington to Londonderry, returning Wed, Oct 22, priced at $1,064 found 6 hours ago
United
Wed, Oct 15 - Wed, Oct 22
DCA
Washington
LDY
Londonderry
$1,164 Roundtrip, found 6 hours ago
$1,164
Roundtrip
found 6 hours ago
Select United flight, departing Wed, Oct 15 from Washington to Londonderry, returning Wed, Oct 22, priced at $1,164 found 6 hours ago
United
Wed, Oct 15 - Wed, Oct 22
DCA
Washington
LDY
Londonderry
$1,296 Roundtrip, found 6 hours ago
$1,296
Roundtrip
found 6 hours ago
Select United flight, departing Wed, Oct 15 from Washington to Londonderry, returning Wed, Oct 22, priced at $1,296 found 6 hours ago
United
Mon, Oct 13 - Fri, Oct 17
DCA
Washington
LDY
Londonderry
$2,361 Roundtrip, found 4 hours ago
$2,361
Roundtrip
found 4 hours ago
Select United flight, departing Mon, Oct 13 from Washington to Londonderry, returning Fri, Oct 17, priced at $2,361 found 4 hours ago
United
Fri, Oct 17 - Tue, Oct 21
DCA
Washington
LDY
Londonderry
$2,590 Roundtrip, found 20 hours ago
$2,590
Roundtrip
found 20 hours ago
Select United flight, departing Fri, Oct 17 from Washington to Londonderry, returning Tue, Oct 21, priced at $2,590 found 20 hours ago
United
Fri, Oct 17 - Tue, Oct 21
DCA
Washington
LDY
Londonderry
$2,591 Roundtrip, found 2 hours ago
$2,591
Roundtrip
found 2 hours ago
Select United flight, departing Fri, Oct 17 from Washington to Londonderry, returning Tue, Oct 21, priced at $2,591 found 2 hours ago
United
Mon, Oct 13 - Fri, Oct 17
DCA
Washington
LDY
Londonderry
$2,661 Roundtrip, found 4 hours ago
$2,661
Roundtrip
found 4 hours ago
Select United flight, departing Mon, Oct 13 from Washington to Londonderry, returning Fri, Oct 17, priced at $2,661 found 4 hours ago
United
Fri, Oct 17 - Tue, Oct 21
DCA
Washington
LDY
Londonderry
$2,951 Roundtrip, found 2 hours ago
$2,951
Roundtrip
found 2 hours ago
Select United flight, departing Fri, Oct 17 from Washington to Londonderry, returning Tue, Oct 21, priced at $2,951 found 2 hours ago
United
Fri, Oct 17 - Tue, Oct 21
DCA
Washington
LDY
Londonderry
$3,500 Roundtrip, found 20 hours ago
$3,500
Roundtrip
found 20 hours ago
Select United flight, departing Fri, Oct 17 from Washington to Londonderry, returning Tue, Oct 21, priced at $3,500 found 20 hours ago
Flights from Washington (DCA) to Londonderry (LDY)
Origin airport
Ronald Reagan Washington National
Destination airport
City of Derry
Roundtrip price
$1,063
Distance
3324 mi

Washington to Londonderry Flights

The cheapest times to fly from Washington to Londonderry

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Londonderry are during the month of October. You can find some of the cheapest flights from Washington to Londonderry with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Londonderry

Sunday is one of the best days to book for cheap flights from Washington to Londonderry: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Londonderry

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Londonderry in 2025. You can also book with separate airlines for your outbound and return journeys, from $607 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Londonderry flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Londonderry airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Ronald Reagan Washington National Airport (DCA) to City of Derry Airport (LDY) cost?
Lock in a cheap one-way flight from $607 or cheap return flight from $1,064 from Ronald Reagan Washington National Airport (DCA) to City of Derry Airport (LDY) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Ronald Reagan Washington National Airport (DCA) to City of Derry Airport (LDY)?
October is the cheapest month to fly from DCA to LDY. Planning your trip for the off-season is often the key to finding better deals on flights.
What is the cheapest airline that flies from Ronald Reagan Washington National Airport (DCA) to City of Derry Airport (LDY)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest DCA to LDY flight.
How many flights per day from Ronald Reagan Washington National Airport (DCA) to City of Derry Airport (LDY)?
There are no daily nonstop flights from Ronald Reagan Washington National Airport (DCA) to City of Derry Airport (LDY). But you can choose flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from DCA to LDY?
Generally you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can change based on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Ronald Reagan Washington National Airport (DCA) to City of Derry Airport (LDY)?
To land at City of Derry Airport (LDY) on time, book a flight that takes off from Ronald Reagan Washington National Airport (DCA) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Ronald Reagan Washington National Airport (DCA) to City of Derry Airport (LDY) last-minute?
Holding off until just before your departure to book a ticket from DCA to LDY generally means paying more. While you may find some last-minute offers, they're not always guaranteed. Keep your travel schedule open to boost your chances of scoring a bargain.
Is it cheaper to book a DCA to LDY flight and hotel package?
Compared with arranging flights and hotels separately, booking a DCA to LDY flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one easy place takes the hassle out of planning your trip. Simply pick your flights and select from our wide range of hotels, then personalize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Ronald Reagan Washington National Airport (DCA) to City of Derry Airport (LDY)?
If you booked your DCA to LDY flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

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*Available to One Key members.