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

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1 Adults (11+)
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 October , November 2026

20 Oct - 23 Nov $ 1,640.00
STL
St Louis
Frontier Airlines
3 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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20 Oct - 23 Nov $ 1,681.00
STL
St Louis
Frontier Airlines
2 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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24 Oct - 23 Nov $ 1,820.00
STL
St Louis
Frontier Airlines
2 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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One-way flights to Klagenfurt from St Louis

2:40 PM - 9:45 AM
Sky Alps
3 Stops
37h 45m
STL - KLU
$ 817
Kiwi
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2:40 PM - 9:45 AM
Sky Alps
2 Stops
37h 45m
STL - KLU
$ 857
Kiwi
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2:40 PM - 12:40 PM
Sky Alps
2 Stops
17h 40m
STL - KLU
$ 996
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.