| Grimes to Orbetello | 4,987.35 mi (8,026.36 km) |
| Grimes to Oria | 5,322.59 mi (8,565.89 km) |
| Grimes to Oristano | 4,996.91 mi (8,041.75 km) |
| Grimes to Orta Nova | 5,210.49 mi (8,385.48 km) |
| Grimes to Orte | 5,031.53 mi (8,097.47 km) |
| Grimes to Ortona | 5,113.11 mi (8,228.76 km) |
| Grimes to Orvieto | 5,009.23 mi (8,061.58 km) |
| Grimes to Orzinuovi | 4,807.08 mi (7,736.25 km) |
| Grimes to Osimo | 5,026.22 mi (8,088.92 km) |
| Grimes to Ospitaletto | 4,805.54 mi (7,733.77 km) |
| Grimes to Ostuni | 5,309.43 mi (8,544.71 km) |
| Grimes to Ottaviano | 5,186.21 mi (8,346.40 km) |
| Grimes to Ovada | 4,791.35 mi (7,710.94 km) |
| Grimes to Ozieri | 4,983.34 mi (8,019.90 km) |
| Grimes to Paceco | 5,244.41 mi (8,440.06 km) |
