| Vernon Hills to Orbetello | 4,733.02 mi (7,617.06 km) |
| Vernon Hills to Oria | 5,073.53 mi (8,165.06 km) |
| Vernon Hills to Oristano | 4,733.33 mi (7,617.56 km) |
| Vernon Hills to Orta Nova | 4,960.28 mi (7,982.80 km) |
| Vernon Hills to Orte | 4,778.94 mi (7,690.96 km) |
| Vernon Hills to Ortona | 4,863.25 mi (7,826.65 km) |
| Vernon Hills to Orvieto | 4,756.85 mi (7,655.40 km) |
| Vernon Hills to Orzinuovi | 4,558.18 mi (7,335.67 km) |
| Vernon Hills to Osimo | 4,777.68 mi (7,688.93 km) |
| Vernon Hills to Ospitaletto | 4,557.22 mi (7,334.14 km) |
| Vernon Hills to Ostuni | 5,060.82 mi (8,144.60 km) |
| Vernon Hills to Ottaviano | 4,933.02 mi (7,938.93 km) |
| Vernon Hills to Ovada | 4,538.76 mi (7,304.43 km) |
| Vernon Hills to Ozieri | 4,721.77 mi (7,598.96 km) |
| Vernon Hills to Paceco | 4,982.23 mi (8,018.13 km) |
