To find the return flight distance between Trieste to Zadar via Piran, Rovinj, Opatija, Lukovo, start with entering the locations in the control and click on Return Flight Distance. You can also add multiple destinations in between while returning from a location. If you are not aware of the routes, you can check the
Trieste to Piran Route via Piran, Rovinj, Opatija, Lukovo.