| Saint-Gilles to Oria | 710.73 mi (1,143.81 km) |
| Saint-Gilles to Oristano | 337.33 mi (542.88 km) |
| Saint-Gilles to Orta Nova | 596.49 mi (959.96 km) |
| Saint-Gilles to Orte | 410.07 mi (659.94 km) |
| Saint-Gilles to Ortona | 511.59 mi (823.32 km) |
| Saint-Gilles to Orvieto | 392.28 mi (631.31 km) |
| Saint-Gilles to Orzinuovi | 295.86 mi (476.15 km) |
| Saint-Gilles to Osimo | 453.05 mi (729.12 km) |
| Saint-Gilles to Ospitaletto | 306.23 mi (492.82 km) |
| Saint-Gilles to Ostuni | 702.32 mi (1,130.27 km) |
| Saint-Gilles to Ottaviano | 549.15 mi (883.78 km) |
| Saint-Gilles to Ovada | 219.22 mi (352.80 km) |
| Saint-Gilles to Ozieri | 317.01 mi (510.18 km) |
| Saint-Gilles to Paceco | 578.23 mi (930.57 km) |
| Saint-Gilles to Pachino | 739.43 mi (1,189.99 km) |
