| Grangemouth to Orbetello | 1,149.38 mi (1,849.75 km) |
| Grangemouth to Oria | 1,441.86 mi (2,320.44 km) |
| Grangemouth to Oristano | 1,245.79 mi (2,004.90 km) |
| Grangemouth to Orta Nova | 1,337.72 mi (2,152.85 km) |
| Grangemouth to Orte | 1,179.01 mi (1,897.43 km) |
| Grangemouth to Ortona | 1,241.53 mi (1,998.05 km) |
| Grangemouth to Orvieto | 1,156.46 mi (1,861.14 km) |
| Grangemouth to Orzinuovi | 942.21 mi (1,516.34 km) |
| Grangemouth to Osimo | 1,150.76 mi (1,851.97 km) |
| Grangemouth to Ospitaletto | 937.17 mi (1,508.23 km) |
| Grangemouth to Ostuni | 1,427.15 mi (2,296.77 km) |
| Grangemouth to Ottaviano | 1,330.54 mi (2,141.29 km) |
| Grangemouth to Ovada | 953.39 mi (1,534.33 km) |
| Grangemouth to Ozieri | 1,211.33 mi (1,949.45 km) |
| Grangemouth to Paceco | 1,454.47 mi (2,340.74 km) |
