| Regensburg to Oerlinghausen | 253.12 mi (407.35 km) |
| Regensburg to Oestrich-Winkel | 195.36 mi (314.40 km) |
| Regensburg to Offenburg | 192.84 mi (310.35 km) |
| Regensburg to Oftersheim | 159.84 mi (257.23 km) |
| Regensburg to Ohrdruf | 138.82 mi (223.41 km) |
| Regensburg to Ohringen | 117.52 mi (189.13 km) |
| Regensburg to Olbernhau | 126.88 mi (204.19 km) |
| Regensburg to Olching | 66.41 mi (106.88 km) |
| Regensburg to Oldenburg | 330.84 mi (532.43 km) |
| Regensburg to Oldenburg in Holstein | 368.63 mi (593.26 km) |
| Regensburg to Olfen | 278.66 mi (448.46 km) |
| Regensburg to Olpe | 233.82 mi (376.29 km) |
| Regensburg to Olsberg | 226.57 mi (364.63 km) |
| Regensburg to Oranienburg | 263.09 mi (423.40 km) |
| Regensburg to Ortenberg | 163.94 mi (263.83 km) |
