| Bad Honnef am Rhein to Opwijk | 134.73 mi (216.83 km) |
| Bad Honnef am Rhein to Ostend | 191.77 mi (308.63 km) |
| Bad Honnef am Rhein to Oud-Heverlee | 112.69 mi (181.36 km) |
| Bad Honnef am Rhein to Oud-Turnhout | 108.06 mi (173.91 km) |
| Bad Honnef am Rhein to Oudenaarde | 159.18 mi (256.17 km) |
| Bad Honnef am Rhein to Oudenburg | 187.82 mi (302.27 km) |
| Bad Honnef am Rhein to Oupeye | 69.48 mi (111.82 km) |
| Bad Honnef am Rhein to Overijse | 118.22 mi (190.26 km) |
| Bad Honnef am Rhein to Overpelt | 88.17 mi (141.89 km) |
| Bad Honnef am Rhein to Paal | 93.66 mi (150.74 km) |
| Bad Honnef am Rhein to Peer | 84.32 mi (135.69 km) |
| Bad Honnef am Rhein to Pepinster | 62.07 mi (99.90 km) |
| Bad Honnef am Rhein to Peruwelz | 160.09 mi (257.63 km) |
| Bad Honnef am Rhein to Perwez | 105.70 mi (170.11 km) |
| Bad Honnef am Rhein to Philippeville | 121.78 mi (195.98 km) |
