Quickest 2h 31min
There are 1 flight1 train company operating 2 routes - 220, S1, and 4 buses from SZG to KLU. The cheapest train costs $36 and is 2h 46min.
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There are 4 ways to travel from SZG to KLU. 1 flight, 4 trains, 4 buses and 1 by car are possible between the two areas. The by car from SZG to KLU is the cheapest. The by car from SZG to KLU is the fastest. The train operated by ÖBB running from Salzburg Hbf to Klagenfurt Hbf is the most convenient.
It's important to check each mode when booking your ticket so that you can find the best method for you. The cost of each type varies differently, so be sure to use Faretrotter to keep an eye out!