| Herisau to Octeville | 522.38 mi (840.69 km) |
| Herisau to Oignies | 355.55 mi (572.20 km) |
| Herisau to Oissel | 398.70 mi (641.65 km) |
| Herisau to Olivet | 344.50 mi (554.42 km) |
| Herisau to Ollioules | 337.03 mi (542.39 km) |
| Herisau to Olonne-sur-Mer | 523.42 mi (842.37 km) |
| Herisau to Oloron-Sainte-Marie | 559.83 mi (900.96 km) |
| Herisau to Onet Village | 382.57 mi (615.69 km) |
| Herisau to Onnaing | 330.63 mi (532.10 km) |
| Herisau to Orange | 310.42 mi (499.58 km) |
| Herisau to Orchies | 346.75 mi (558.03 km) |
| Herisau to Orleans | 344.25 mi (554.02 km) |
| Herisau to Orly | 330.90 mi (532.53 km) |
| Herisau to Ormesson-sur-Marne | 325.20 mi (523.36 km) |
| Herisau to Orsay | 339.27 mi (546.00 km) |
