| Fort Wayne to Orbetello | 4,667.04 mi (7,510.88 km) |
| Fort Wayne to Oria | 5,011.83 mi (8,065.75 km) |
| Fort Wayne to Oristano | 4,658.30 mi (7,496.81 km) |
| Fort Wayne to Orta Nova | 4,897.73 mi (7,882.13 km) |
| Fort Wayne to Orte | 4,714.51 mi (7,587.26 km) |
| Fort Wayne to Ortona | 4,801.19 mi (7,726.77 km) |
| Fort Wayne to Orvieto | 4,692.64 mi (7,552.08 km) |
| Fort Wayne to Orzinuovi | 4,497.55 mi (7,238.11 km) |
| Fort Wayne to Osimo | 4,716.98 mi (7,591.24 km) |
| Fort Wayne to Ospitaletto | 4,497.14 mi (7,237.45 km) |
| Fort Wayne to Ostuni | 4,999.54 mi (8,045.98 km) |
| Fort Wayne to Ottaviano | 4,867.76 mi (7,833.90 km) |
| Fort Wayne to Ovada | 4,474.76 mi (7,201.44 km) |
| Fort Wayne to Ozieri | 4,648.79 mi (7,481.50 km) |
| Fort Wayne to Paceco | 4,908.21 mi (7,899.01 km) |
