| Heswall to Octeville | 263.27 mi (423.69 km) |
| Heswall to Oignies | 326.14 mi (524.87 km) |
| Heswall to Oissel | 329.38 mi (530.08 km) |
| Heswall to Olivet | 436.35 mi (702.23 km) |
| Heswall to Ollioules | 814.10 mi (1,310.16 km) |
| Heswall to Olonne-sur-Mer | 472.94 mi (761.13 km) |
| Heswall to Oloron-Sainte-Marie | 709.38 mi (1,141.64 km) |
| Heswall to Onet Village | 670.63 mi (1,079.28 km) |
| Heswall to Onnaing | 350.40 mi (563.91 km) |
| Heswall to Orange | 729.09 mi (1,173.36 km) |
| Heswall to Orchies | 334.45 mi (538.25 km) |
| Heswall to Orleans | 434.18 mi (698.75 km) |
| Heswall to Orly | 396.30 mi (637.79 km) |
| Heswall to Ormesson-sur-Marne | 397.77 mi (640.16 km) |
| Heswall to Orsay | 393.65 mi (633.52 km) |
