On Bornholm, Dantaxi provides taxi services on the entire island. There are selected locations where you’ll find a Taxi: On Torvet in Rønne (The square), at the ferry terminal in Rønne, and at Bornholm’s Airport. However, it is always good to order a taxi if you need one. That way you’ll be sure that there is a Taxi ready for you. It is easy to book. You can read more here.
If you arrive on Bornholm by plane, you can easily get to Rønne and the rest of the island by taxi and BAT’s buses.