| Bad Honnef am Rhein to Novi di Modena | 432.34 mi (695.78 km) |
| Bad Honnef am Rhein to Novi Ligure | 413.05 mi (664.74 km) |
| Bad Honnef am Rhein to Nuoro | 720.79 mi (1,160.01 km) |
| Bad Honnef am Rhein to Occhiobello | 443.93 mi (714.44 km) |
| Bad Honnef am Rhein to Oderzo | 414.18 mi (666.55 km) |
| Bad Honnef am Rhein to Oggiono | 349.80 mi (562.96 km) |
| Bad Honnef am Rhein to Olbia | 680.94 mi (1,095.86 km) |
| Bad Honnef am Rhein to Oleggio | 354.54 mi (570.58 km) |
| Bad Honnef am Rhein to Olgiate Comasco | 345.30 mi (555.71 km) |
| Bad Honnef am Rhein to Olgiate Olona | 354.57 mi (570.63 km) |
| Bad Honnef am Rhein to Omegna | 333.79 mi (537.18 km) |
| Bad Honnef am Rhein to Opera | 374.96 mi (603.44 km) |
| Bad Honnef am Rhein to Oppeano | 412.02 mi (663.08 km) |
| Bad Honnef am Rhein to Orbassano | 389.79 mi (627.31 km) |
| Bad Honnef am Rhein to Orbetello | 597.53 mi (961.62 km) |
