There are various means of transport to get around the Kvarner region. Unfortunately a car is the most convenient mode of transport, especially if travelling with a bike. However there are public transport options to most locations, although not to Platak.
Buses are by fat the most useful means of public transport throughout both the region and Croatia.
The biggest bus company is Autotrans, which incidentally is based in Rijeka. However there are numerous other companies. The islands are almost exclusively served by Autotrans. There is no one website that covers all bus routes. The best is Bus Croatia (xxxxxx), some but all Autotrans routes are covered so it's best to also check their website (xxxxxxx). Most tickets can now be bought online and printed. Otherwise tickets can be bought at bus stations, or on the buses when boarding in a location without a bus station.
Bags put in the storage space under the bus are charged 7 or 8 Kuna a bag.
Buses do not normally carry bicycles The drivers sometimes allow it if you ask them directly but this can not be relied upon. If accepted expect to pay about 20 Kuna per bicycle.
There ferry network is not as comprehensive as in the south of Croatia. The fast passenger catamarans run only once a day to Cres, Losinj, Rab and Pag. The car ferries from Istria to Cres and from Krk to Cres and Rab run regularly. As a passenger it is easiest just to buy a bus ticket to your destination which includes the ferry ride.
Irritatingly the ferries charge more for a bicycle than for a passenger, but it's still pretty cheap.
Jadrolinija is the biggest reffy company in Croatia, and baed in Rijeka. Time tiaetables can be found here However the catamarans re run by a different company “Krilo” which means Wing (xxxxxxx).
Catamarans do not carry bicycles.
The rail network in the region is very limited, with only a few trains a day and mainly at inconvenient times. However a few of the trains do carry bicycles which makes them useful to get to the mountains. At present only the 05:45 train from Rijeka towards Zagreb.
The trains is winter are also a reliable way to visit Delnice which has an excellent ice rink.
Autotrolej has an extensive network of cheap local and county buses, covering the Rijeka and Opatija. The regional buses go to several useful places for hiking and trail running. The details are listed with individual routes.
There are single tickets for between 1 and 4 zones. Daily tickets are available for either 1 or al 4 zones. Daily tickets are usually the best option if you are taking more than one trip in a day. Tickets are available at all kiosks which are on almost every street corner in throughout the region. Single tickets can also be bought from the driver but cost a little more.