$495 Cheap Flights from Houston (IAH) to Graz (GRZ)

View $495 flight on Wed, Dec 3, 2025Opens in a new window

Popular airlines from George Bush Intercontinental Airport (IAH) to Graz (GRZ)

Cheap Flights from Houston to Graz (IAH-GRZ)

Prices were available within the past 7 days and start at $495 for one-way flights and $667 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, Dec 3 - Tue, Dec 9
IAH
Houston
GRZ
Graz
$667 Roundtrip, found 6 hours ago
$667
Roundtrip
found 6 hours ago
Select Air Canada flight, departing Wed, Dec 3 from Houston to Graz, returning Tue, Dec 9, priced at $667 found 6 hours ago
Air Canada
Wed, Dec 3 - Tue, Dec 9
IAH
Houston
GRZ
Graz
$674 Roundtrip, found 6 hours ago
$674
Roundtrip
found 6 hours ago
Select Air Canada flight, departing Wed, Dec 3 from Houston to Graz, returning Tue, Dec 9, priced at $674 found 6 hours ago
Air Canada
Wed, Dec 3 - Tue, Dec 9
IAH
Houston
GRZ
Graz
$676 Roundtrip, found 6 hours ago
$676
Roundtrip
found 6 hours ago
Select Air Canada flight, departing Wed, Dec 3 from Houston to Graz, returning Tue, Dec 9, priced at $676 found 6 hours ago
Air Canada
Wed, Dec 3 - Tue, Dec 9
IAH
Houston
GRZ
Graz
$680 Roundtrip, found 6 hours ago
$680
Roundtrip
found 6 hours ago
Select Air Canada flight, departing Wed, Dec 3 from Houston to Graz, returning Tue, Dec 9, priced at $680 found 6 hours ago
Lufthansa
Tue, Aug 11 - Tue, Aug 25
IAH
Houston
GRZ
Graz
$682 Roundtrip, found 17 hours ago
$682
Roundtrip
found 17 hours ago
Select Lufthansa flight, departing Tue, Aug 11 from Houston to Graz, returning Tue, Aug 25, priced at $682 found 17 hours ago
Air Canada
Wed, Dec 3 - Tue, Dec 9
IAH
Houston
GRZ
Graz
$682 Roundtrip, found 6 hours ago
$682
Roundtrip
found 6 hours ago
Select Air Canada flight, departing Wed, Dec 3 from Houston to Graz, returning Tue, Dec 9, priced at $682 found 6 hours ago
Austrian Airlines
Wed, Dec 3 - Tue, Dec 9
IAH
Houston
GRZ
Graz
$685 Roundtrip, found 6 hours ago
$685
Roundtrip
found 6 hours ago
Select Austrian Airlines flight, departing Wed, Dec 3 from Houston to Graz, returning Tue, Dec 9, priced at $685 found 6 hours ago
Air Canada
Wed, Dec 3 - Tue, Dec 9
IAH
Houston
GRZ
Graz
$687 Roundtrip, found 6 hours ago
$687
Roundtrip
found 6 hours ago
Select Air Canada flight, departing Wed, Dec 3 from Houston to Graz, returning Tue, Dec 9, priced at $687 found 6 hours ago
United
Mon, Dec 15 - Wed, Jan 7
IAH
Houston
GRZ
Graz
$856 Roundtrip, found 4 days ago
$856
Roundtrip
found 4 days ago
Select United flight, departing Mon, Dec 15 from Houston to Graz, returning Wed, Jan 7, priced at $856 found 4 days ago
Swiss International Air Lines
Tue, Aug 11 - Tue, Aug 25
IAH
Houston
GRZ
Graz
$960 Roundtrip, found 17 hours ago
$960
Roundtrip
found 17 hours ago
Select Swiss International Air Lines flight, departing Tue, Aug 11 from Houston to Graz, returning Tue, Aug 25, priced at $960 found 17 hours ago

Frequently asked questions

How much does a flight from George Bush Intercontinental Airport (IAH) to Thalerhof Airport (GRZ) cost?
Get a cheap one-way flight from $495 or cheap return flight from $667 from George Bush Intercontinental Airport (IAH) to Thalerhof Airport (GRZ) 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 George Bush Intercontinental Airport (IAH) to Thalerhof Airport (GRZ)?
December is the least expensive month to fly from IAH to GRZ. Avoiding peak travel times is often the key to finding better deals on flights.
What is the cheapest airline that flies from George Bush Intercontinental Airport (IAH) to Thalerhof Airport (GRZ)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll fly you from IAH to GRZ. Then, sort your results by "Price (lowest to highest)" to pick up a great deal.
How many flights per day from George Bush Intercontinental Airport (IAH) to Thalerhof Airport (GRZ)?
You'll have to book a flight with a layover if you're traveling from George Bush Intercontinental Airport (IAH) to Thalerhof Airport (GRZ). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from IAH to GRZ?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*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 Thalerhof Airport (GRZ)?
To avoid possible delays on the George Bush Intercontinental Airport (IAH) to Thalerhof Airport (GRZ) route, fly before 3 PM. Flights after this time have a 22% higher chance of cancellation.**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 Thalerhof Airport (GRZ) last-minute?
Waiting until just before your trip to book a flight from IAH to GRZ generally means paying more. While it's possible to find some last-minute offers, they're not always guaranteed. Be flexible with your itinerary for the best chance of snagging a bargain.
Is it cheaper to book an IAH to GRZ flight and hotel package?
Booking an IAH to GRZ flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Pick from our wide range of accommodations and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from George Bush Intercontinental Airport (IAH) to Thalerhof Airport (GRZ)?
You can usually reschedule or cancel your IAH to GRZ flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
George Bush Intercontinental
Destination airport
Graz
Airlines serving
Air Canada, Austrian Airlines, Lufthansa, Swiss International Air Lines
Roundtrip price
$667
Distance
5598 mi

Book with confidence

Houston to Graz Flights

The cheapest times to fly from Houston to Graz

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

 

The best time to book a flight from Houston to Graz

Sunday is one of the best days to book for cheap flights from Houston to Graz: 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 Graz

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 Graz in 2025. You can also book with separate airlines for your outbound and return journeys, from $495 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 Graz 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 Graz 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.

 

Houston to Graz Flights

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*Available to One Key members.