| Saint-Omer to Novi di Modena | 568.77 mi (915.35 km) |
| Saint-Omer to Novi Ligure | 512.50 mi (824.79 km) |
| Saint-Omer to Nuoro | 797.03 mi (1,282.69 km) |
| Saint-Omer to Occhiobello | 589.89 mi (949.33 km) |
| Saint-Omer to Oderzo | 581.63 mi (936.04 km) |
| Saint-Omer to Oggiono | 472.87 mi (761.01 km) |
| Saint-Omer to Olbia | 762.61 mi (1,227.30 km) |
| Saint-Omer to Oleggio | 460.89 mi (741.73 km) |
| Saint-Omer to Olgiate Comasco | 460.94 mi (741.81 km) |
| Saint-Omer to Olgiate Olona | 466.47 mi (750.72 km) |
| Saint-Omer to Omegna | 439.00 mi (706.50 km) |
| Saint-Omer to Opera | 490.04 mi (788.64 km) |
| Saint-Omer to Oppeano | 557.60 mi (897.37 km) |
| Saint-Omer to Orbassano | 465.69 mi (749.46 km) |
| Saint-Omer to Orbetello | 713.19 mi (1,147.77 km) |
