The only way from Graz to Köln is by flight. You should expect to be able to find tickets starting around $337, if you search flights from GRZ to CGN. The best time to book long flights is 5-6 weeks before your trip.
On your trip from Graz to Köln, it is best to book as soon as possible. It won't necessarily help reduce your price by a large amount, but will ensure that you have a spot on the bus or train.
|Cheapest Way||Flight — $337|
|Fastest Way||Flight — 6h 6min|
|Eco-Friendly Way||Flight — 549 lb CO2|
|Available Modes||1 modes — flight|