| Opelika to Orbetello | 5,041.71 mi (8,113.85 km) |
| Opelika to Oria | 5,395.51 mi (8,683.24 km) |
| Opelika to Oristano | 5,005.89 mi (8,056.20 km) |
| Opelika to Orta Nova | 5,280.04 mi (8,497.40 km) |
| Opelika to Orte | 5,093.17 mi (8,196.66 km) |
| Opelika to Ortona | 5,185.77 mi (8,345.69 km) |
| Opelika to Orvieto | 5,072.17 mi (8,162.88 km) |
| Opelika to Orzinuovi | 4,888.93 mi (7,867.98 km) |
| Opelika to Osimo | 5,106.11 mi (8,217.50 km) |
| Opelika to Ospitaletto | 4,890.01 mi (7,869.72 km) |
| Opelika to Ostuni | 5,384.54 mi (8,665.57 km) |
| Opelika to Ottaviano | 5,242.61 mi (8,437.16 km) |
| Opelika to Ovada | 4,856.97 mi (7,816.53 km) |
| Opelika to Ozieri | 5,002.79 mi (8,051.21 km) |
| Opelika to Paceco | 5,256.41 mi (8,459.37 km) |
