I'm planning to buy train tickets online for Oslo Airport to Geilo.
If i buy these online in advance (minipris or normal) will they be for a specific train or for the line i'm travelling with ?
Especially for the oslo airport - oslo central part. (Oslo-Geilo is one specific train that i must have to get there on the same day.
( when buying you choose specific trains, but i'm not sure how fast i will be though the airport.
Thanks for any info.