| Lake Forest to Orbetello | 6,264.20 mi (10,081.25 km) |
| Lake Forest to Oria | 6,574.93 mi (10,581.33 km) |
| Lake Forest to Oristano | 6,305.81 mi (10,148.22 km) |
| Lake Forest to Orta Nova | 6,468.98 mi (10,410.82 km) |
| Lake Forest to Orte | 6,301.54 mi (10,141.35 km) |
| Lake Forest to Ortona | 6,371.98 mi (10,254.70 km) |
| Lake Forest to Orvieto | 6,278.86 mi (10,104.85 km) |
| Lake Forest to Orzinuovi | 6,067.80 mi (9,765.19 km) |
| Lake Forest to Osimo | 6,281.82 mi (10,109.61 km) |
| Lake Forest to Ospitaletto | 6,064.21 mi (9,759.40 km) |
| Lake Forest to Ostuni | 6,560.35 mi (10,557.87 km) |
| Lake Forest to Ottaviano | 6,455.91 mi (10,389.78 km) |
| Lake Forest to Ovada | 6,065.20 mi (9,761.00 km) |
| Lake Forest to Ozieri | 6,285.49 mi (10,115.52 km) |
| Lake Forest to Paceco | 6,545.43 mi (10,533.86 km) |
