| Bad Mergentheim to Octeville | 510.91 mi (822.23 km) |
| Bad Mergentheim to Oignies | 308.15 mi (495.92 km) |
| Bad Mergentheim to Oissel | 389.85 mi (627.40 km) |
| Bad Mergentheim to Olivet | 376.01 mi (605.13 km) |
| Bad Mergentheim to Ollioules | 477.45 mi (768.39 km) |
| Bad Mergentheim to Olonne-sur-Mer | 570.55 mi (918.21 km) |
| Bad Mergentheim to Oloron-Sainte-Marie | 658.17 mi (1,059.23 km) |
| Bad Mergentheim to Onet Village | 489.86 mi (788.36 km) |
| Bad Mergentheim to Onnaing | 280.97 mi (452.17 km) |
| Bad Mergentheim to Orange | 438.15 mi (705.13 km) |
| Bad Mergentheim to Orchies | 297.37 mi (478.57 km) |
| Bad Mergentheim to Orleans | 374.72 mi (603.06 km) |
| Bad Mergentheim to Orly | 337.36 mi (542.93 km) |
| Bad Mergentheim to Ormesson-sur-Marne | 330.29 mi (531.55 km) |
| Bad Mergentheim to Orsay | 347.17 mi (558.71 km) |
