Dutch team probably flew in on KLM or NWA, unless they couldn't get there using those airlines
But then, I don't think they came in as a group. Each team (skaters, etc.) probably came in on their own and had to make their own arrangements (probably pay their own tickets too).
I do know the skaters have been somewhere high up in the mountains for several weeks to get acclimated to the altitude, maybe others are doing the same.
Dutch bob team most likely flew in from their latest tournament somewhere in the Alps, etc.