| Ponte da Barca to Oerlinghausen | 1,064.97 mi (1,713.90 km) |
| Ponte da Barca to Oestrich-Winkel | 968.21 mi (1,558.18 km) |
| Ponte da Barca to Offenburg | 917.73 mi (1,476.95 km) |
| Ponte da Barca to Oftersheim | 971.01 mi (1,562.69 km) |
| Ponte da Barca to Ohrdruf | 1,101.26 mi (1,772.31 km) |
| Ponte da Barca to Ohringen | 1,003.42 mi (1,614.84 km) |
| Ponte da Barca to Olbernhau | 1,199.95 mi (1,931.14 km) |
| Ponte da Barca to Olching | 1,056.67 mi (1,700.55 km) |
| Ponte da Barca to Oldenburg | 1,098.31 mi (1,767.56 km) |
| Ponte da Barca to Oldenburg in Holstein | 1,233.49 mi (1,985.11 km) |
| Ponte da Barca to Olfen | 1,010.33 mi (1,625.97 km) |
| Ponte da Barca to Olpe | 998.58 mi (1,607.07 km) |
| Ponte da Barca to Olsberg | 1,034.75 mi (1,665.26 km) |
| Ponte da Barca to Oranienburg | 1,257.91 mi (2,024.42 km) |
| Ponte da Barca to Ortenberg | 1,020.96 mi (1,643.08 km) |
