| Regensburg to Navodari | 846.01 mi (1,361.52 km) |
| Regensburg to Negresti-Oas | 525.30 mi (845.38 km) |
| Regensburg to Nehoiu | 712.85 mi (1,147.21 km) |
| Regensburg to Ocna Mures | 576.17 mi (927.25 km) |
| Regensburg to Odobesti | 734.50 mi (1,182.07 km) |
| Regensburg to Odorheiu Secuiesc | 641.83 mi (1,032.93 km) |
| Regensburg to Oltenita | 769.14 mi (1,237.81 km) |
| Regensburg to Onesti | 708.50 mi (1,140.22 km) |
| Regensburg to Oradea | 473.48 mi (762.00 km) |
| Regensburg to Orastie | 563.08 mi (906.18 km) |
| Regensburg to Oravita | 528.55 mi (850.62 km) |
| Regensburg to Orsova | 569.54 mi (916.59 km) |
| Regensburg to Otelu Rosu | 538.13 mi (866.04 km) |
| Regensburg to Otopeni | 728.71 mi (1,172.74 km) |
| Regensburg to Ovidiu | 845.38 mi (1,360.51 km) |
