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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 July , August 2026

28 Jul - 28 Aug $ 1,560.00
STL
St Louis
Frontier Airlines
2 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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28 Jul - 28 Aug $ 1,650.00
STL
St Louis
Frontier Airlines
2 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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28 Jul - 31 Aug $ 1,733.00
STL
St Louis
Frontier Airlines
2 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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Last minute flights from St Louis to Klagenfurt

28 Jul - 01 Aug $ 2,365.00
STL
St Louis
Frontier Airlines
2 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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28 Jul - 01 Aug $ 2,455.00
STL
St Louis
Frontier Airlines
2 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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28 Jul - 01 Aug $ 2,599.00
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

6:02 AM - 9:45 AM
Sky Alps
2 Stops
46h 23m
STL - KLU
$ 784
Kiwi
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2:40 PM - 9:45 AM
Sky Alps
2 Stops
37h 45m
STL - KLU
$ 874
Kiwi
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8:55 AM - 1:20 PM
Austrian Airlines
2 Stops
22h 5m
STL - KLU
$ 1,017
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.