| Fort Wayne to Oerlinghausen | 4,205.64 mi (6,768.32 km) |
| Fort Wayne to Oestrich-Winkel | 4,250.41 mi (6,840.37 km) |
| Fort Wayne to Offenburg | 4,303.10 mi (6,925.18 km) |
| Fort Wayne to Oftersheim | 4,295.39 mi (6,912.76 km) |
| Fort Wayne to Ohrdruf | 4,322.66 mi (6,956.66 km) |
| Fort Wayne to Ohringen | 4,336.61 mi (6,979.10 km) |
| Fort Wayne to Olbernhau | 4,423.93 mi (7,119.62 km) |
| Fort Wayne to Olching | 4,443.73 mi (7,151.49 km) |
| Fort Wayne to Oldenburg | 4,148.33 mi (6,676.10 km) |
| Fort Wayne to Oldenburg in Holstein | 4,202.30 mi (6,762.94 km) |
| Fort Wayne to Olfen | 4,167.01 mi (6,706.15 km) |
| Fort Wayne to Olpe | 4,208.13 mi (6,772.33 km) |
| Fort Wayne to Olsberg | 4,220.61 mi (6,792.42 km) |
| Fort Wayne to Oranienburg | 4,340.82 mi (6,985.88 km) |
| Fort Wayne to Ortenberg | 4,277.51 mi (6,883.99 km) |
