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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 June , July 2026

29 Jun - 21 Jul $ 1,790.00
STL
St Louis
Frontier Airlines
3 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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29 Jun - 25 Jul $ 1,844.00
STL
St Louis
Frontier Airlines
3 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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30 Jun - 21 Jul $ 1,861.00
STL
St Louis
Frontier Airlines
3 STOPS
KLU
Klagenfurt
KLU
Klagenfurt
Frontier Airlines
3 STOPS
STL
St Louis
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One-way flights to Klagenfurt from St Louis

1:20 PM - 10:40 AM
Eurowings
3 Stops
39h 50m
STL - KLU
$ 936
Kiwi
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2:15 PM - 1:20 PM
Austrian Airlines
3 Stops
40h 45m
STL - KLU
$ 1,005
Kiwi
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1:20 PM - 9:45 AM
Sky Alps
3 Stops
39h 5m
STL - KLU
$ 1,006
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.