| Onex to Cividale del Friuli | 350.99 mi (564.87 km) |
| Onex to Civita Castellana | 411.71 mi (662.58 km) |
| Onex to Civitanova Marche | 424.03 mi (682.41 km) |
| Onex to Civitavecchia | 399.14 mi (642.35 km) |
| Onex to Civitella in Val di Chiana | 335.08 mi (539.26 km) |
| Onex to Clusone | 185.82 mi (299.04 km) |
| Onex to Coccaglio | 191.40 mi (308.03 km) |
| Onex to Codigoro | 305.81 mi (492.16 km) |
| Onex to Codogno | 187.84 mi (302.30 km) |
| Onex to Codroipo | 329.99 mi (531.07 km) |
| Onex to Cogoleto | 175.14 mi (281.87 km) |
| Onex to Colle di Val d'Elsa | 312.77 mi (503.36 km) |
| Onex to Colle Salvetti | 279.02 mi (449.03 km) |
| Onex to Collecchio | 222.67 mi (358.36 km) |
| Onex to Colleferro | 461.07 mi (742.02 km) |
