| Kastav to Oestrich-Winkel | 434.80 mi (699.75 km) |
| Kastav to Offenburg | 370.34 mi (596.00 km) |
| Kastav to Oftersheim | 385.74 mi (620.79 km) |
| Kastav to Ohrdruf | 411.94 mi (662.95 km) |
| Kastav to Ohringen | 348.41 mi (560.71 km) |
| Kastav to Olbernhau | 368.61 mi (593.22 km) |
| Kastav to Olching | 242.19 mi (389.77 km) |
| Kastav to Oldenburg | 603.35 mi (971.00 km) |
| Kastav to Oldenburg in Holstein | 635.50 mi (1,022.74 km) |
| Kastav to Olfen | 541.24 mi (871.04 km) |
| Kastav to Olpe | 491.53 mi (791.04 km) |
| Kastav to Olsberg | 492.53 mi (792.66 km) |
| Kastav to Oranienburg | 512.33 mi (824.51 km) |
| Kastav to Ortenberg | 422.42 mi (679.83 km) |
| Kastav to Oschatz | 413.34 mi (665.20 km) |
