Karlovac is 55 km southwest of Zagreb on the A1 motorway, making it an easy stop if you are driving to Dalmatia. The drive from Zagreb takes under an hour.
Regular trains connect Karlovac to Zagreb (about 1 hour 15 minutes) and the railway line continues south towards Split, though the coastal section involves changing at Ogulin or Knin. Buses are faster and more frequent than trains for Zagreb, departing roughly every hour from the bus station near the city centre.
The nearest international airport is Zagreb (ZAG).