| Avon Lake to Orbetello | 4,520.08 mi (7,274.37 km) |
| Avon Lake to Oria | 4,866.81 mi (7,832.37 km) |
| Avon Lake to Oristano | 4,507.07 mi (7,253.43 km) |
| Avon Lake to Orta Nova | 4,752.35 mi (7,648.17 km) |
| Avon Lake to Orte | 4,568.29 mi (7,351.96 km) |
| Avon Lake to Ortona | 4,656.13 mi (7,493.32 km) |
| Avon Lake to Orvieto | 4,546.56 mi (7,316.98 km) |
| Avon Lake to Orzinuovi | 4,353.45 mi (7,006.20 km) |
| Avon Lake to Osimo | 4,572.68 mi (7,359.02 km) |
| Avon Lake to Ospitaletto | 4,353.33 mi (7,006.00 km) |
| Avon Lake to Ostuni | 4,854.75 mi (7,812.97 km) |
| Avon Lake to Ottaviano | 4,721.04 mi (7,597.77 km) |
| Avon Lake to Ovada | 4,328.93 mi (6,966.75 km) |
| Avon Lake to Ozieri | 4,498.49 mi (7,239.62 km) |
| Avon Lake to Paceco | 4,757.31 mi (7,656.15 km) |
