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Cheap flights from St Louis (STL) to Klagenfurt (KLU)

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0 Children (2~11)
0 Infants (0~2)
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How to find the cheapest flight from St Louis (STL) to Klagenfurt (KLU)

How to find the cheapest flight from St Louis (STL) to Klagenfurt (KLU)
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How to find the cheapest flight from St Louis (STL) to Klagenfurt (KLU)
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How to find the cheapest flight from St Louis (STL) to Klagenfurt (KLU)
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Cheap flights from St Louis to Klagenfurt in April , May 2026

23 Apr - 28 May $ 1,581.00
STL
St Louis
Frontier Airlines
3 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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29 Apr - 28 May $ 1,610.00
STL
St Louis
Frontier Airlines
3 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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23 Apr - 30 May $ 1,663.00
STL
St Louis
Frontier Airlines
3 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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Last minute flights from St Louis to Klagenfurt

23 Apr - 01 May $ 1,907.00
STL
St Louis
Frontier Airlines
3 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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23 Apr - 01 May $ 1,923.00
STL
St Louis
Alaska Airlines
3 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Alaska Airlines
3 STOPS
STL
St Louis
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One-way flights to Klagenfurt from St Louis

11:25 AM - 10:35 PM
Austrian Airlines
3 Stops
28h 55m
STL - KLU
$ 837
Kiwi
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1:02 PM - 10:35 PM
Austrian Airlines
3 Stops
27h 18m
STL - KLU
$ 950
Kiwi
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1:46 PM - 10:35 PM
Austrian Airlines
3 Stops
26h 34m
STL - KLU
$ 953
Kiwi
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How to find the cheapest flight from St Louis (STL) to Klagenfurt (KLU)

Related info for your journey
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How to find the cheapest flight from St Louis (STL) to Klagenfurt (KLU)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Klagenfurt (KLU)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.