| Rianxo to Oerlinghausen | 1,037.19 mi (1,669.19 km) |
| Rianxo to Oestrich-Winkel | 946.31 mi (1,522.94 km) |
| Rianxo to Offenburg | 901.91 mi (1,451.48 km) |
| Rianxo to Oftersheim | 952.24 mi (1,532.49 km) |
| Rianxo to Ohrdruf | 1,079.53 mi (1,737.33 km) |
| Rianxo to Ohringen | 986.32 mi (1,587.32 km) |
| Rianxo to Olbernhau | 1,181.09 mi (1,900.79 km) |
| Rianxo to Olching | 1,045.09 mi (1,681.90 km) |
| Rianxo to Oldenburg | 1,066.52 mi (1,716.40 km) |
| Rianxo to Oldenburg in Holstein | 1,201.72 mi (1,933.97 km) |
| Rianxo to Olfen | 981.66 mi (1,579.83 km) |
| Rianxo to Olpe | 972.83 mi (1,565.62 km) |
| Rianxo to Olsberg | 1,008.71 mi (1,623.36 km) |
| Rianxo to Oranienburg | 1,232.58 mi (1,983.64 km) |
| Rianxo to Ortenberg | 999.05 mi (1,607.81 km) |
