| Mongat to Oerlinghausen | 785.31 mi (1,263.83 km) |
| Mongat to Oestrich-Winkel | 650.48 mi (1,046.85 km) |
| Mongat to Offenburg | 556.70 mi (895.92 km) |
| Mongat to Oftersheim | 625.38 mi (1,006.45 km) |
| Mongat to Ohrdruf | 761.85 mi (1,226.08 km) |
| Mongat to Ohringen | 638.49 mi (1,027.55 km) |
| Mongat to Olbernhau | 825.76 mi (1,328.93 km) |
| Mongat to Olching | 641.43 mi (1,032.29 km) |
| Mongat to Oldenburg | 852.65 mi (1,372.21 km) |
| Mongat to Oldenburg in Holstein | 970.52 mi (1,561.90 km) |
| Mongat to Olfen | 748.06 mi (1,203.88 km) |
| Mongat to Olpe | 710.71 mi (1,143.78 km) |
| Mongat to Olsberg | 743.44 mi (1,196.44 km) |
| Mongat to Oranienburg | 932.46 mi (1,500.65 km) |
| Mongat to Ortenberg | 694.53 mi (1,117.74 km) |
