| Plano to Orbetello | 5,512.89 mi (8,872.15 km) |
| Plano to Oria | 5,857.35 mi (9,426.49 km) |
| Plano to Oristano | 5,502.83 mi (8,855.95 km) |
| Plano to Orta Nova | 5,743.35 mi (9,243.04 km) |
| Plano to Orte | 5,560.30 mi (8,948.44 km) |
| Plano to Ortona | 5,646.74 mi (9,087.56 km) |
| Plano to Orvieto | 5,538.42 mi (8,913.23 km) |
| Plano to Orzinuovi | 5,342.82 mi (8,598.44 km) |
| Plano to Osimo | 5,562.30 mi (8,951.65 km) |
| Plano to Ospitaletto | 5,342.30 mi (8,597.61 km) |
| Plano to Ostuni | 5,844.99 mi (9,406.61 km) |
| Plano to Ottaviano | 5,713.60 mi (9,195.15 km) |
| Plano to Ovada | 5,320.51 mi (8,562.54 km) |
| Plano to Ozieri | 5,493.88 mi (8,841.54 km) |
| Plano to Paceco | 5,752.97 mi (9,258.50 km) |
