$482 Cheap Flights from Washington (IAD) to Knock (NOC)

View $482 flight on Sun, Oct 12, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Knock (NOC-Ireland West)

Cheap Flights from Washington to Knock (IAD-NOC)

Prices were available within the past 7 days and start at $482 for one-way flights and $750 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Fri, Nov 28 - Fri, Dec 5
IAD
Washington
NOC
Knock
$750 Roundtrip, found 4 days ago
$750
Roundtrip
found 4 days ago
Select British Airways flight, departing Fri, Nov 28 from Washington to Knock, returning Fri, Dec 5, priced at $750 found 4 days ago
Aer Lingus
Wed, Oct 15 - Tue, Oct 21
IAD
Washington
NOC
Knock
$755 Roundtrip, found 1 day ago
$755
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Wed, Oct 15 from Washington to Knock, returning Tue, Oct 21, priced at $755 found 1 day ago
Aer Lingus
Tue, Mar 10 - Tue, Mar 24
IAD
Washington
NOC
Knock
$790 Roundtrip, found 1 day ago
$790
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Tue, Mar 10 from Washington to Knock, returning Tue, Mar 24, priced at $790 found 1 day ago
Aer Lingus
Mon, Oct 6 - Mon, Oct 13
IAD
Washington
NOC
Knock
$805 Roundtrip, found 6 days ago
$805
Roundtrip
found 6 days ago
Select Aer Lingus flight, departing Mon, Oct 6 from Washington to Knock, returning Mon, Oct 13, priced at $805 found 6 days ago
Air Canada
Wed, Mar 11 - Mon, Mar 23
IAD
Washington
NOC
Knock
$826 Roundtrip, found 5 days ago
$826
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed, Mar 11 from Washington to Knock, returning Mon, Mar 23, priced at $826 found 5 days ago
Air Canada
Wed, Mar 11 - Mon, Mar 23
IAD
Washington
NOC
Knock
$833 Roundtrip, found 5 days ago
$833
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed, Mar 11 from Washington to Knock, returning Mon, Mar 23, priced at $833 found 5 days ago
Air Canada
Wed, Mar 11 - Mon, Mar 23
IAD
Washington
NOC
Knock
$839 Roundtrip, found 5 days ago
$839
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed, Mar 11 from Washington to Knock, returning Mon, Mar 23, priced at $839 found 5 days ago
Aer Lingus
Mon, Jan 12 - Sun, Jan 18
IAD
Washington
NOC
Knock
$844 Roundtrip, found 2 days ago
$844
Roundtrip
found 2 days ago
Select Aer Lingus flight, departing Mon, Jan 12 from Washington to Knock, returning Sun, Jan 18, priced at $844 found 2 days ago
Iberia
Tue, Mar 10 - Tue, Mar 24
IAD
Washington
NOC
Knock
$861 Roundtrip, found 1 day ago
$861
Roundtrip
found 1 day ago
Select Iberia flight, departing Tue, Mar 10 from Washington to Knock, returning Tue, Mar 24, priced at $861 found 1 day ago
American Airlines
Tue, Mar 10 - Tue, Mar 24
IAD
Washington
NOC
Knock
$865 Roundtrip, found 1 day ago
$865
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Mar 10 from Washington to Knock, returning Tue, Mar 24, priced at $865 found 1 day ago
Flights from Washington (IAD) to Knock (NOC)
Origin airport
Washington Dulles Intl.
Destination airport
Ireland West
Airlines serving
Aer Lingus, British Airways
Roundtrip price
$750
Distance
3285 mi

Washington to Knock Flights

The cheapest times to fly from Washington to Knock

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

 

The best time to book a flight from Washington to Knock

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

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 Knock in 2025. You can also book with separate airlines for your outbound and return journeys, from $482 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 Knock 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 Knock 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 Washington Dulles Intl. Airport (IAD) to Ireland West Airport (NOC) cost?
Secure a cheap one-way flight from $482 or cheap return flight from $750 from Washington Dulles Intl. Airport (IAD) to Ireland West Airport (NOC) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Ireland West Airport (NOC)?
Planning your trip for November can help you save, as it's the cheapest month for flights between IAD and NOC. You'll typically find the lowest fares during the off-season.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Ireland West Airport (NOC)?
To find the cheapest airline flying from IAD to NOC, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Ireland West Airport (NOC)?
There aren't any daily direct flights departing from Washington Dulles Intl. Airport (IAD) to Ireland West Airport (NOC). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be cruising above the clouds before you know it.
What day of the week has the most flights from IAD to NOC?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* However, this can vary depending on the season, carrier 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 Washington Dulles Intl. Airport (IAD) to Ireland West Airport (NOC)?
To avoid possible delays on the Washington Dulles Intl. Airport (IAD) to Ireland West Airport (NOC) route, aim to fly before 3 PM. Flights after this time are 22% more likely to be 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 Washington Dulles Intl. Airport (IAD) to Ireland West Airport (NOC) last-minute?
Booking your plane ticket from IAD to NOC shortly before your journey is generally more expensive. But if you're flexible with your departure dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book an IAD to NOC flight and hotel package?
Compared with arranging hotels and flights separately, booking an IAD to NOC flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place will take the stress out of planning your trip. Simply secure your flights and choose from our extensive range of stays, then personalize your trip with other add-ons like activities and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Ireland West Airport (NOC)?
In most cases, you're able to cancel or reschedule your IAD to NOC flight. However, additional charges may apply, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's policies and fees on flight changes, or if you want further information, head to our Customer Service portal.

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*Available to One Key members.