$518 Cheap Flights from St. Louis (STL) to Graz (GRZ)

View $518 flight on Mon, Oct 20, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Graz (GRZ)

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from St. Louis to Graz (STL-GRZ)

Prices were available within the past 7 days and start at $518 for one-way flights and $696 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, Oct 29 - Wed, Nov 12
STL
St. Louis
GRZ
Graz
$696 Roundtrip, found 2 days ago
$696
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Oct 29 from St. Louis to Graz, returning Wed, Nov 12, priced at $696 found 2 days ago
Air Canada
Mon, Oct 20 - Wed, Nov 5
STL
St. Louis
GRZ
Graz
$698 Roundtrip, found 2 days ago
$698
Roundtrip
found 2 days ago
Select Air Canada flight, departing Mon, Oct 20 from St. Louis to Graz, returning Wed, Nov 5, priced at $698 found 2 days ago
United
Sat, Oct 25 - Wed, Nov 5
STL
St. Louis
GRZ
Graz
$703 Roundtrip, found 2 days ago
$703
Roundtrip
found 2 days ago
Select United flight, departing Sat, Oct 25 from St. Louis to Graz, returning Wed, Nov 5, priced at $703 found 2 days ago
Air Canada
Mon, Oct 20 - Thu, Nov 20
STL
St. Louis
GRZ
Graz
$705 Roundtrip, found 1 day ago
$705
Roundtrip
found 1 day ago
Select Air Canada flight, departing Mon, Oct 20 from St. Louis to Graz, returning Thu, Nov 20, priced at $705 found 1 day ago
Air Canada
Wed, Oct 29 - Thu, Nov 13
STL
St. Louis
GRZ
Graz
$706 Roundtrip, found 2 days ago
$706
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Oct 29 from St. Louis to Graz, returning Thu, Nov 13, priced at $706 found 2 days ago
United
Sun, Oct 19 - Thu, Nov 6
STL
St. Louis
GRZ
Graz
$706 Roundtrip, found 2 days ago
$706
Roundtrip
found 2 days ago
Select United flight, departing Sun, Oct 19 from St. Louis to Graz, returning Thu, Nov 6, priced at $706 found 2 days ago
Lufthansa
Mon, Oct 20 - Thu, Nov 20
STL
St. Louis
GRZ
Graz
$707 Roundtrip, found 1 day ago
$707
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Mon, Oct 20 from St. Louis to Graz, returning Thu, Nov 20, priced at $707 found 1 day ago
Lufthansa
Mon, Oct 20 - Thu, Nov 20
STL
St. Louis
GRZ
Graz
$707 Roundtrip, found 1 day ago
$707
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Mon, Oct 20 from St. Louis to Graz, returning Thu, Nov 20, priced at $707 found 1 day ago
Air Canada
Mon, Oct 20 - Thu, Nov 6
STL
St. Louis
GRZ
Graz
$708 Roundtrip, found 2 days ago
$708
Roundtrip
found 2 days ago
Select Air Canada flight, departing Mon, Oct 20 from St. Louis to Graz, returning Thu, Nov 6, priced at $708 found 2 days ago
Austrian Airlines
Thu, Oct 16 - Fri, Nov 14
STL
St. Louis
GRZ
Graz
$861 Roundtrip, found 1 day ago
$861
Roundtrip
found 1 day ago
Select Austrian Airlines flight, departing Thu, Oct 16 from St. Louis to Graz, returning Fri, Nov 14, priced at $861 found 1 day ago
Flights from St. Louis (STL) to Graz (GRZ)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Graz
Airlines serving
Air Canada, Austrian Airlines, Lufthansa
Roundtrip price
$696
Distance
4959 mi

St. Louis to Graz Flights

The cheapest times to fly from St. Louis 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 St. Louis to Graz are during the month of October. You can find some of the cheapest flights from St. Louis to Graz with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Graz

Sunday is one of the best days to book for cheap flights from St. Louis 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 St. Louis 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 St. Louis to Graz in 2025. You can also book with separate airlines for your outbound and return journeys, from $518 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 St. Louis 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 St. Louis 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.

 

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Thalerhof Airport (GRZ) cost?
Get a cheap one-way flight from $518 or cheap return flight from $696 from Lambert-St. Louis Intl. Airport (STL) to Thalerhof Airport (GRZ) 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 Lambert-St. Louis Intl. Airport (STL) to Thalerhof Airport (GRZ)?
The cheapest month to fly from STL to GRZ is October, when demand is low. Off-peak season is typically when airlines offer better prices between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Thalerhof Airport (GRZ)?
Use the filters on Expedia to compare airlines and find the cheapest carrier that'll take you from STL to GRZ. Then, sort your results by "Price (lowest to highest)" to snag a good deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Thalerhof Airport (GRZ)?
There are no daily direct flights from Lambert-St. Louis Intl. Airport (STL) to Thalerhof Airport (GRZ). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be on your way in no time at all.
What day of the week has the most flights from STL to GRZ?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the airline, season 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 Lambert-St. Louis Intl. Airport (STL) to Thalerhof Airport (GRZ)?
Opt for a flight from Lambert-St. Louis Intl. Airport (STL) to Thalerhof Airport (GRZ) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this hour are on average 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 Lambert-St. Louis Intl. Airport (STL) to Thalerhof Airport (GRZ) last-minute?
Last-minute fares from STL to GRZ are typically more expensive. To lock in the lowest rates, start looking for flights as soon as possible. That said, if your travel plans are flexible, it's possible to land a cheap ticket right before you leave.
Is it cheaper to book a STL to GRZ flight and hotel package?
Opting for a STL to GRZ flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Pick from our impressive range of stays and then add car rentals, flights and activities 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 Lambert-St. Louis Intl. Airport (STL) to Thalerhof Airport (GRZ)?
In most cases, you're able to reschedule or cancel your STL to GRZ flight. However, there may be additional charges, especially if you booked over 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you want further information, go to our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.