| Horn-Bad Meinberg to Octeville | 488.73 mi (786.54 km) |
| Horn-Bad Meinberg to Oignies | 276.47 mi (444.93 km) |
| Horn-Bad Meinberg to Oissel | 387.09 mi (622.95 km) |
| Horn-Bad Meinberg to Olivet | 419.33 mi (674.85 km) |
| Horn-Bad Meinberg to Ollioules | 621.29 mi (999.87 km) |
| Horn-Bad Meinberg to Olonne-sur-Mer | 608.47 mi (979.24 km) |
| Horn-Bad Meinberg to Oloron-Sainte-Marie | 746.88 mi (1,201.98 km) |
| Horn-Bad Meinberg to Onet Village | 596.29 mi (959.63 km) |
| Horn-Bad Meinberg to Onnaing | 254.58 mi (409.70 km) |
| Horn-Bad Meinberg to Orange | 568.34 mi (914.65 km) |
| Horn-Bad Meinberg to Orchies | 266.20 mi (428.40 km) |
| Horn-Bad Meinberg to Orleans | 417.20 mi (671.42 km) |
| Horn-Bad Meinberg to Orly | 361.96 mi (582.52 km) |
| Horn-Bad Meinberg to Ormesson-sur-Marne | 355.00 mi (571.32 km) |
| Horn-Bad Meinberg to Orsay | 371.22 mi (597.42 km) |
