| Reguengos de Monsaraz to Oerlinghausen | 1,218.56 mi (1,961.08 km) |
| Reguengos de Monsaraz to Oestrich-Winkel | 1,105.82 mi (1,779.65 km) |
| Reguengos de Monsaraz to Offenburg | 1,037.68 mi (1,669.98 km) |
| Reguengos de Monsaraz to Oftersheim | 1,098.81 mi (1,768.36 km) |
| Reguengos de Monsaraz to Ohrdruf | 1,235.51 mi (1,988.37 km) |
| Reguengos de Monsaraz to Ohringen | 1,125.10 mi (1,810.68 km) |
| Reguengos de Monsaraz to Olbernhau | 1,323.18 mi (2,129.45 km) |
| Reguengos de Monsaraz to Olching | 1,159.00 mi (1,865.22 km) |
| Reguengos de Monsaraz to Oldenburg | 1,263.35 mi (2,033.17 km) |
| Reguengos de Monsaraz to Oldenburg in Holstein | 1,396.70 mi (2,247.76 km) |
| Reguengos de Monsaraz to Olfen | 1,167.58 mi (1,879.04 km) |
| Reguengos de Monsaraz to Olpe | 1,147.32 mi (1,846.44 km) |
| Reguengos de Monsaraz to Olsberg | 1,183.61 mi (1,904.84 km) |
| Reguengos de Monsaraz to Oranienburg | 1,400.93 mi (2,254.58 km) |
| Reguengos de Monsaraz to Ortenberg | 1,157.44 mi (1,862.72 km) |
