| Grapevine to Orbetello | 5,531.96 mi (8,902.82 km) |
| Grapevine to Oria | 5,876.21 mi (9,456.85 km) |
| Grapevine to Oristano | 5,522.29 mi (8,887.27 km) |
| Grapevine to Orta Nova | 5,762.26 mi (9,273.46 km) |
| Grapevine to Orte | 5,579.29 mi (8,979.00 km) |
| Grapevine to Ortona | 5,665.62 mi (9,117.94 km) |
| Grapevine to Orvieto | 5,557.40 mi (8,943.77 km) |
| Grapevine to Orzinuovi | 5,361.62 mi (8,628.70 km) |
| Grapevine to Osimo | 5,581.10 mi (8,981.92 km) |
| Grapevine to Ospitaletto | 5,361.07 mi (8,627.82 km) |
| Grapevine to Ostuni | 5,863.84 mi (9,436.93 km) |
| Grapevine to Ottaviano | 5,732.64 mi (9,225.79 km) |
| Grapevine to Ovada | 5,339.47 mi (8,593.05 km) |
| Grapevine to Ozieri | 5,513.25 mi (8,872.72 km) |
| Grapevine to Paceco | 5,772.40 mi (9,289.77 km) |
