| Riorges to Oestrich-Winkel | 328.89 mi (529.29 km) |
| Riorges to Offenburg | 247.68 mi (398.60 km) |
| Riorges to Oftersheim | 312.14 mi (502.35 km) |
| Riorges to Ohrdruf | 450.67 mi (725.29 km) |
| Riorges to Ohringen | 334.85 mi (538.89 km) |
| Riorges to Olbernhau | 532.36 mi (856.76 km) |
| Riorges to Olching | 372.95 mi (600.20 km) |
| Riorges to Oldenburg | 524.81 mi (844.59 km) |
| Riorges to Oldenburg in Holstein | 645.20 mi (1,038.34 km) |
| Riorges to Olfen | 420.31 mi (676.42 km) |
| Riorges to Olpe | 384.87 mi (619.38 km) |
| Riorges to Olsberg | 418.76 mi (673.93 km) |
| Riorges to Oranienburg | 620.35 mi (998.35 km) |
| Riorges to Ortenberg | 376.83 mi (606.45 km) |
| Riorges to Oschatz | 549.82 mi (884.85 km) |
