In October I will be traveling from Paris to Hannover, Germany. I will need to decide if it's better to go by train (my preference) or fly. And by better I mean for cost and time efficiency. What do you travel experts think?
We will probably go from Hannover to Cologne, likely by a relatives car. We will need to end up eventually in Frankfurt to fly home. To take a train from Cologne - Frankfurt is it more cost effective to buy advance train tickets, or can they be purchased for the same price on the day of travel?
Thanks!!