| Peso da Regua to Oerlinghausen | 1,075.64 mi (1,731.08 km) |
| Peso da Regua to Oestrich-Winkel | 973.65 mi (1,566.93 km) |
| Peso da Regua to Offenburg | 917.79 mi (1,477.04 km) |
| Peso da Regua to Oftersheim | 973.56 mi (1,566.79 km) |
| Peso da Regua to Ohrdruf | 1,106.15 mi (1,780.18 km) |
| Peso da Regua to Ohringen | 1,004.33 mi (1,616.32 km) |
| Peso da Regua to Olbernhau | 1,201.95 mi (1,934.35 km) |
| Peso da Regua to Olching | 1,052.45 mi (1,693.75 km) |
| Peso da Regua to Oldenburg | 1,112.76 mi (1,790.81 km) |
| Peso da Regua to Oldenburg in Holstein | 1,247.64 mi (2,007.88 km) |
| Peso da Regua to Olfen | 1,022.01 mi (1,644.76 km) |
| Peso da Regua to Olpe | 1,007.53 mi (1,621.47 km) |
| Peso da Regua to Olsberg | 1,043.85 mi (1,679.92 km) |
| Peso da Regua to Oranienburg | 1,265.83 mi (2,037.15 km) |
| Peso da Regua to Ortenberg | 1,026.25 mi (1,651.59 km) |
