| Renfrew to Orbetello | 1,160.12 mi (1,867.04 km) |
| Renfrew to Oria | 1,456.53 mi (2,344.06 km) |
| Renfrew to Oristano | 1,252.07 mi (2,015.02 km) |
| Renfrew to Orta Nova | 1,351.54 mi (2,175.10 km) |
| Renfrew to Orte | 1,190.88 mi (1,916.54 km) |
| Renfrew to Ortona | 1,255.07 mi (2,019.84 km) |
| Renfrew to Orvieto | 1,168.28 mi (1,880.17 km) |
| Renfrew to Orzinuovi | 954.34 mi (1,535.86 km) |
| Renfrew to Osimo | 1,164.44 mi (1,873.99 km) |
| Renfrew to Ospitaletto | 949.61 mi (1,528.25 km) |
| Renfrew to Ostuni | 1,441.94 mi (2,320.58 km) |
| Renfrew to Ottaviano | 1,343.03 mi (2,161.40 km) |
| Renfrew to Ovada | 963.34 mi (1,550.34 km) |
| Renfrew to Ozieri | 1,218.48 mi (1,960.95 km) |
| Renfrew to Paceco | 1,463.50 mi (2,355.27 km) |
