| Monserrat to Oerlinghausen | 977.65 mi (1,573.37 km) |
| Monserrat to Oestrich-Winkel | 846.85 mi (1,362.88 km) |
| Monserrat to Offenburg | 758.33 mi (1,220.41 km) |
| Monserrat to Oftersheim | 826.05 mi (1,329.40 km) |
| Monserrat to Ohrdruf | 963.97 mi (1,551.36 km) |
| Monserrat to Ohringen | 842.35 mi (1,355.64 km) |
| Monserrat to Olbernhau | 1,032.86 mi (1,662.22 km) |
| Monserrat to Olching | 850.65 mi (1,369.00 km) |
| Monserrat to Oldenburg | 1,039.69 mi (1,673.22 km) |
| Monserrat to Oldenburg in Holstein | 1,163.11 mi (1,871.84 km) |
| Monserrat to Olfen | 936.00 mi (1,506.34 km) |
| Monserrat to Olpe | 902.89 mi (1,453.06 km) |
| Monserrat to Olsberg | 937.07 mi (1,508.08 km) |
| Monserrat to Oranienburg | 1,134.70 mi (1,826.12 km) |
| Monserrat to Ortenberg | 893.44 mi (1,437.86 km) |
