| Gap to Oignies | 432.86 mi (696.63 km) |
| Gap to Oissel | 405.41 mi (652.44 km) |
| Gap to Olivet | 303.28 mi (488.08 km) |
| Gap to Ollioules | 98.79 mi (158.99 km) |
| Gap to Olonne-sur-Mer | 403.49 mi (649.36 km) |
| Gap to Oloron-Sainte-Marie | 345.95 mi (556.75 km) |
| Gap to Onet Village | 172.36 mi (277.39 km) |
| Gap to Onnaing | 418.97 mi (674.27 km) |
| Gap to Orange | 69.12 mi (111.23 km) |
| Gap to Orchies | 429.49 mi (691.20 km) |
| Gap to Orleans | 304.98 mi (490.82 km) |
| Gap to Orly | 337.76 mi (543.58 km) |
| Gap to Ormesson-sur-Marne | 336.73 mi (541.91 km) |
| Gap to Orsay | 340.27 mi (547.62 km) |
| Gap to Orthez | 348.13 mi (560.27 km) |
