| Sankt Gallen to Octeville | 525.91 mi (846.37 km) |
| Sankt Gallen to Oignies | 357.57 mi (575.46 km) |
| Sankt Gallen to Oissel | 402.11 mi (647.14 km) |
| Sankt Gallen to Olivet | 348.93 mi (561.55 km) |
| Sankt Gallen to Ollioules | 341.96 mi (550.33 km) |
| Sankt Gallen to Olonne-sur-Mer | 528.41 mi (850.39 km) |
| Sankt Gallen to Oloron-Sainte-Marie | 565.46 mi (910.01 km) |
| Sankt Gallen to Onet Village | 388.20 mi (624.75 km) |
| Sankt Gallen to Onnaing | 332.49 mi (535.09 km) |
| Sankt Gallen to Orange | 315.88 mi (508.36 km) |
| Sankt Gallen to Orchies | 348.67 mi (561.14 km) |
| Sankt Gallen to Orleans | 348.65 mi (561.10 km) |
| Sankt Gallen to Orly | 334.60 mi (538.49 km) |
| Sankt Gallen to Ormesson-sur-Marne | 328.85 mi (529.23 km) |
| Sankt Gallen to Orsay | 343.04 mi (552.07 km) |
