| Bad Mergentheim to Opwijk | 266.68 mi (429.18 km) |
| Bad Mergentheim to Ostend | 324.35 mi (521.99 km) |
| Bad Mergentheim to Oud-Heverlee | 243.73 mi (392.24 km) |
| Bad Mergentheim to Oud-Turnhout | 245.13 mi (394.49 km) |
| Bad Mergentheim to Oudenaarde | 288.28 mi (463.93 km) |
| Bad Mergentheim to Oudenburg | 320.10 mi (515.15 km) |
| Bad Mergentheim to Oupeye | 200.87 mi (323.27 km) |
| Bad Mergentheim to Overijse | 248.06 mi (399.21 km) |
| Bad Mergentheim to Overpelt | 225.41 mi (362.77 km) |
| Bad Mergentheim to Paal | 229.01 mi (368.55 km) |
| Bad Mergentheim to Peer | 221.17 mi (355.93 km) |
| Bad Mergentheim to Pepinster | 190.14 mi (306.00 km) |
| Bad Mergentheim to Peruwelz | 283.32 mi (455.96 km) |
| Bad Mergentheim to Perwez | 232.91 mi (374.82 km) |
| Bad Mergentheim to Philippeville | 237.33 mi (381.95 km) |
