High-speed route

Koralmbahn

Graz → Klagenfurt · Austria

Distance: 130 km
Fastest time: 45 min
Top speed: 250 km/h
Operator: ÖBB
Train: ÖBB Railjet · Cityjet
Countries: Austria
In service since: 2025

Austria’s game-changer of December 2025: the 33 km Koralm Tunnel cuts Graz–Klagenfurt from nearly three hours to 45 minutes, forging a new Baltic–Adriatic high-speed axis.

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