| Waukegan to Orbetello | 4,723.62 mi (7,601.93 km) |
| Waukegan to Oria | 5,064.00 mi (8,149.72 km) |
| Waukegan to Oristano | 4,724.22 mi (7,602.90 km) |
| Waukegan to Orta Nova | 4,950.77 mi (7,967.50 km) |
| Waukegan to Orte | 4,769.49 mi (7,675.75 km) |
| Waukegan to Ortona | 4,853.73 mi (7,811.33 km) |
| Waukegan to Orvieto | 4,747.39 mi (7,640.19 km) |
| Waukegan to Orzinuovi | 4,548.63 mi (7,320.31 km) |
| Waukegan to Osimo | 4,768.13 mi (7,673.56 km) |
| Waukegan to Ospitaletto | 4,547.66 mi (7,318.75 km) |
| Waukegan to Ostuni | 5,051.27 mi (8,129.24 km) |
| Waukegan to Ottaviano | 4,923.59 mi (7,923.76 km) |
| Waukegan to Ovada | 4,529.31 mi (7,289.22 km) |
| Waukegan to Ozieri | 4,712.59 mi (7,584.18 km) |
| Waukegan to Paceco | 4,973.08 mi (8,003.39 km) |
