$511 Cheap Flights from Donegal (CFN) to Washington (IAD)

View $511 flight on Sat, Jan 24, 2026Opens in a new window

Popular airlines from Donegal (CFN) to Washington Dulles Intl. Airport (IAD)

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Cheap Flights from Donegal to Washington (CFN-IAD)

Prices were available within the past 7 days and start at $511 for one-way flights and $524 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Sat, Nov 22 - Sat, Dec 6
CFN
Donegal
IAD
Washington
$524 Roundtrip, found 15 hours ago
$524
Roundtrip
found 15 hours ago
Select Aer Lingus flight, departing Sat, Nov 22 from Donegal to Washington, returning Sat, Dec 6, priced at $524 found 15 hours ago
Aer Lingus
Sat, Nov 22 - Sat, Dec 6
CFN
Donegal
IAD
Washington
$543 Roundtrip, found 15 hours ago
$543
Roundtrip
found 15 hours ago
Select Aer Lingus flight, departing Sat, Nov 22 from Donegal to Washington, returning Sat, Dec 6, priced at $543 found 15 hours ago
Aer Lingus
Sat, Nov 22 - Sat, Dec 6
CFN
Donegal
IAD
Washington
$551 Roundtrip, found 15 hours ago
$551
Roundtrip
found 15 hours ago
Select Aer Lingus flight, departing Sat, Nov 22 from Donegal to Washington, returning Sat, Dec 6, priced at $551 found 15 hours ago
British Airways
Sat, Nov 22 - Sat, Dec 6
CFN
Donegal
IAD
Washington
$684 Roundtrip, found 15 hours ago
$684
Roundtrip
found 15 hours ago
Select British Airways flight, departing Sat, Nov 22 from Donegal to Washington, returning Sat, Dec 6, priced at $684 found 15 hours ago
British Airways
Sat, Nov 22 - Sat, Dec 6
CFN
Donegal
IAD
Washington
$707 Roundtrip, found 15 hours ago
$707
Roundtrip
found 15 hours ago
Select British Airways flight, departing Sat, Nov 22 from Donegal to Washington, returning Sat, Dec 6, priced at $707 found 15 hours ago
British Airways
Sat, Nov 22 - Sat, Dec 6
CFN
Donegal
IAD
Washington
$714 Roundtrip, found 15 hours ago
$714
Roundtrip
found 15 hours ago
Select British Airways flight, departing Sat, Nov 22 from Donegal to Washington, returning Sat, Dec 6, priced at $714 found 15 hours ago
Aer Lingus
Sat, Nov 22 - Sat, Dec 6
CFN
Donegal
IAD
Washington
$715 Roundtrip, found 15 hours ago
$715
Roundtrip
found 15 hours ago
Select Aer Lingus flight, departing Sat, Nov 22 from Donegal to Washington, returning Sat, Dec 6, priced at $715 found 15 hours ago
Aer Lingus
Sat, Nov 22 - Sat, Dec 6
CFN
Donegal
IAD
Washington
$723 Roundtrip, found 15 hours ago
$723
Roundtrip
found 15 hours ago
Select Aer Lingus flight, departing Sat, Nov 22 from Donegal to Washington, returning Sat, Dec 6, priced at $723 found 15 hours ago
Aer Lingus
Sat, Nov 22 - Sat, Dec 6
CFN
Donegal
IAD
Washington
$730 Roundtrip, found 15 hours ago
$730
Roundtrip
found 15 hours ago
Select Aer Lingus flight, departing Sat, Nov 22 from Donegal to Washington, returning Sat, Dec 6, priced at $730 found 15 hours ago
British Airways
Sat, Nov 22 - Sat, Dec 6
CFN
Donegal
IAD
Washington
$754 Roundtrip, found 15 hours ago
$754
Roundtrip
found 15 hours ago
Select British Airways flight, departing Sat, Nov 22 from Donegal to Washington, returning Sat, Dec 6, priced at $754 found 15 hours ago
Flights from Donegal (CFN) to Washington (IAD)
Origin airport
Donegal
Destination airport
Washington Dulles Intl.
Airlines serving
Aer Lingus, British Airways
Roundtrip price
$523
Distance
3289 mi

Donegal to Washington Flights

The cheapest times to fly from Donegal to Washington

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 Donegal to Washington are during the month of November. You can find some of the cheapest flights from Donegal to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Donegal to Washington

Sunday is one of the best days to book for cheap flights from Donegal to Washington: 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 Donegal to Washington

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 Donegal to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $511 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 Donegal to Washington 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 Donegal to Washington 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 Donegal Airport (CFN) to Washington Dulles Intl. Airport (IAD) cost?
Get a cheap one-way flight from $511 or cheap return flight from $524 from Donegal Airport (CFN) to Washington Dulles Intl. Airport (IAD) 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 Donegal Airport (CFN) to Washington Dulles Intl. Airport (IAD)?
The cheapest month to fly from CFN to IAD is November, when there's less demand. Off-peak months are usually when better flight deals are available between these airports.
What is the cheapest airline that flies from Donegal Airport (CFN) to Washington Dulles Intl. Airport (IAD)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest CFN to IAD flight.
How many flights per day from Donegal Airport (CFN) to Washington Dulles Intl. Airport (IAD)?
You'll need to catch a flight with a layover if you're traveling from Donegal Airport (CFN) to Washington Dulles Intl. Airport (IAD). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from CFN to IAD?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Donegal Airport (CFN) to Washington Dulles Intl. Airport (IAD)?
To avoid potential delays on the Donegal Airport (CFN) to Washington Dulles Intl. Airport (IAD) route, aim to fly before 3 PM. Later flights have a 22% higher chance of being canceled.**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 Donegal Airport (CFN) to Washington Dulles Intl. Airport (IAD) last-minute?
Last-minute fares from CFN to IAD are generally more expensive. For the cheapest rates, start looking for flights well in advance. That said, if you can play around with your travel dates, it's possible to find a cheap ticket right before your journey.
Is it cheaper to book a CFN to IAD flight and hotel package?
Compared with arranging flights and hotels separately, booking a CFN to IAD flight and hotel package with Expedia could result in significant savings. What's more, having it all in one place will take the hassle out of travel planning. Just pick your flights and select from our extensive range of hotels, then customize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Donegal Airport (CFN) to Washington Dulles Intl. Airport (IAD)?
Generally, it's possible to reschedule or cancel your CFN to IAD flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.