| Fergus Falls to Oerlinghausen | 4,321.86 mi (6,955.36 km) |
| Fergus Falls to Oestrich-Winkel | 4,389.82 mi (7,064.73 km) |
| Fergus Falls to Offenburg | 4,458.16 mi (7,174.71 km) |
| Fergus Falls to Oftersheim | 4,438.29 mi (7,142.74 km) |
| Fergus Falls to Ohrdruf | 4,440.68 mi (7,146.59 km) |
| Fergus Falls to Ohringen | 4,476.72 mi (7,204.58 km) |
| Fergus Falls to Olbernhau | 4,530.80 mi (7,291.62 km) |
| Fergus Falls to Olching | 4,584.39 mi (7,377.86 km) |
| Fergus Falls to Oldenburg | 4,254.34 mi (6,846.69 km) |
| Fergus Falls to Oldenburg in Holstein | 4,284.38 mi (6,895.05 km) |
| Fergus Falls to Olfen | 4,291.69 mi (6,906.81 km) |
| Fergus Falls to Olpe | 4,337.97 mi (6,981.30 km) |
| Fergus Falls to Olsberg | 4,344.02 mi (6,991.02 km) |
| Fergus Falls to Oranienburg | 4,427.79 mi (7,125.84 km) |
| Fergus Falls to Ortenberg | 4,408.29 mi (7,094.47 km) |
