| Clydebank to Orbetello | 1,161.52 mi (1,869.29 km) |
| Clydebank to Oria | 1,457.80 mi (2,346.11 km) |
| Clydebank to Oristano | 1,253.57 mi (2,017.43 km) |
| Clydebank to Orta Nova | 1,352.84 mi (2,177.19 km) |
| Clydebank to Orte | 1,192.25 mi (1,918.74 km) |
| Clydebank to Ortona | 1,256.38 mi (2,021.95 km) |
| Clydebank to Orvieto | 1,169.65 mi (1,882.37 km) |
| Clydebank to Orzinuovi | 955.70 mi (1,538.04 km) |
| Clydebank to Osimo | 1,165.75 mi (1,876.09 km) |
| Clydebank to Ospitaletto | 950.96 mi (1,530.42 km) |
| Clydebank to Ostuni | 1,443.21 mi (2,322.62 km) |
| Clydebank to Ottaviano | 1,344.38 mi (2,163.57 km) |
| Clydebank to Ovada | 964.76 mi (1,552.62 km) |
| Clydebank to Ozieri | 1,219.96 mi (1,963.33 km) |
| Clydebank to Paceco | 1,464.94 mi (2,357.59 km) |
