We took an 8:50 AM flight from Klagenfurt to Frankfurt Hahn (HHN) on Ryanair (an airline that we dislike from previous terrible service, however, this time they were efficient and we even arrived early). Frankfurt Hahn Airport (HHN) is not in Frankfurt at all, but over 100 km from Frankfurt!
Luckily, there is a regular bus service between HHN and Frankfurt by a company called Bohr. The tickets cost 12 Euros/person and they can be purchased either on the bus or at the information center, which is located at the entrance of Terminal A. We recommend that you purchase your tickets at the information counter, because the buses can get overcrowded. In our case, it was over sold and there were a lot more people standing around than could fit on the bus. These buses come every 1/2 hour so it’s not the end of the world if you miss a bus, but the next one might be just as crowded! When the time is near, it is probably best that you stand close to the bus pick up point, which is just right in front of Terminal A. The bus makes a stop at Frankfurt Main Airport (FRA) before continuing to its final destination of Frankfurt Hauptbahnhof Train Station (main train station). We arrived at Hauptbahnhof Train Station around 12:30, it took about an hour and forty five minutes for the entire journey. Also, our accommodation was only a block away from the train station, which was very convenient, and it was also easy to get to the main city attractions!