$577 Cheap Flights from Houston (IAH) to Knock (NOC)

View $577 flight on Mon, Aug 18, 2025Opens in a new window

Popular airlines from George Bush Intercontinental Airport (IAH) to Knock (NOC-Ireland West)

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Cheap Flights from Houston to Knock (IAH-NOC)

Prices were available within the past 7 days and start at $577 for one-way flights and $916 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, Aug 18 - Sun, Aug 24
IAH
Houston
NOC
Knock
$916 Roundtrip, found 3 days ago
$916
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Aug 18 from Houston to Knock, returning Sun, Aug 24, priced at $916 found 3 days ago
Air Canada
Mon, Aug 18 - Sun, Aug 24
IAH
Houston
NOC
Knock
$923 Roundtrip, found 3 days ago
$923
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Aug 18 from Houston to Knock, returning Sun, Aug 24, priced at $923 found 3 days ago
Air Canada
Mon, Aug 18 - Sun, Aug 24
IAH
Houston
NOC
Knock
$948 Roundtrip, found 3 days ago
$948
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Aug 18 from Houston to Knock, returning Sun, Aug 24, priced at $948 found 3 days ago
British Airways
Mon, Aug 18 - Sun, Aug 24
IAH
Houston
NOC
Knock
$974 Roundtrip, found 3 days ago
$974
Roundtrip
found 3 days ago
Select British Airways flight, departing Mon, Aug 18 from Houston to Knock, returning Sun, Aug 24, priced at $974 found 3 days ago
Air Canada
Sun, Aug 10 - Sun, Aug 17
IAH
Houston
NOC
Knock
$979 Roundtrip, found 6 days ago
$979
Roundtrip
found 6 days ago
Select Air Canada flight, departing Sun, Aug 10 from Houston to Knock, returning Sun, Aug 17, priced at $979 found 6 days ago
Air Canada
Sun, Aug 10 - Sun, Aug 17
IAH
Houston
NOC
Knock
$985 Roundtrip, found 6 days ago
$985
Roundtrip
found 6 days ago
Select Air Canada flight, departing Sun, Aug 10 from Houston to Knock, returning Sun, Aug 17, priced at $985 found 6 days ago
American Airlines
Thu, Jul 31 - Thu, Aug 7
IAH
Houston
NOC
Knock
$987 Roundtrip, found 2 days ago
$987
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Jul 31 from Houston to Knock, returning Thu, Aug 7, priced at $987 found 2 days ago
British Airways
Sun, Aug 10 - Sun, Aug 17
IAH
Houston
NOC
Knock
$988 Roundtrip, found 6 days ago
$988
Roundtrip
found 6 days ago
Select British Airways flight, departing Sun, Aug 10 from Houston to Knock, returning Sun, Aug 17, priced at $988 found 6 days ago
Aer Lingus
Thu, Jul 31 - Thu, Aug 7
IAH
Houston
NOC
Knock
$1,007 Roundtrip, found 2 days ago
$1,007
Roundtrip
found 2 days ago
Select Aer Lingus flight, departing Thu, Jul 31 from Houston to Knock, returning Thu, Aug 7, priced at $1,007 found 2 days ago
Iberia
Thu, Jul 31 - Thu, Aug 7
IAH
Houston
NOC
Knock
$1,015 Roundtrip, found 2 days ago
$1,015
Roundtrip
found 2 days ago
Select Iberia flight, departing Thu, Jul 31 from Houston to Knock, returning Thu, Aug 7, priced at $1,015 found 2 days ago
Flights from Houston (IAH) to Knock (NOC)
Origin airport
George Bush Intercontinental
Destination airport
Ireland West
Roundtrip price
$916
Distance
4437 mi

Houston to Knock Flights

The cheapest times to fly from Houston 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 Houston to Knock are during the month of August. You can find some of the cheapest flights from Houston to Knock with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Houston to Knock

Sunday is one of the best days to book for cheap flights from Houston 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 Houston 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 Houston to Knock in 2025. You can also book with separate airlines for your outbound and return journeys, from $577 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 Houston 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 Houston 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 George Bush Intercontinental Airport (IAH) to Ireland West Airport (NOC) cost?
Discover the latest flight deals from IAH to NOC by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from IAH to NOC?
The cheapest flights from IAH to NOC are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from IAH to NOC?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from IAH to NOC. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from George Bush Intercontinental Airport (IAH) to Ireland West Airport (NOC)?
There aren't any daily direct flights from George Bush Intercontinental Airport (IAH) 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 in no time at all.
What day of the week has the most flights from IAH to NOC?
Generally you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* However, this can change based on the time of year, 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 George Bush Intercontinental Airport (IAH) to Ireland West Airport (NOC)?
To reach Ireland West Airport (NOC) without delays, choose a flight that leaves George Bush Intercontinental Airport (IAH) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 George Bush Intercontinental Airport (IAH) to Ireland West Airport (NOC) last-minute?
Last-minute bookings from IAH to NOC are typically more expensive. To lock in the best rates, start searching for flights early. That being said, if you're flexible with your travel dates, it's possible to find a cheap fare right before your journey.
Is it cheaper to book an IAH to NOC flight and hotel package?
Compared with arranging hotels and flights separately, booking an IAH to NOC flight and hotel package with Expedia could result in significant savings. Better still, managing everything in one place will take the stress out of planning your trip. Just pick your flights and choose from our extensive range of hotels, then tailor your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from George Bush Intercontinental Airport (IAH) to Ireland West Airport (NOC)?
If you booked your IAH to NOC flight in the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.

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*Available to One Key members.