| Onalaska to Cortona | 4,779.79 mi (7,692.33 km) |
| Onalaska to Cosenza | 5,128.76 mi (8,253.94 km) |
| Onalaska to Cossato | 4,533.63 mi (7,296.17 km) |
| Onalaska to Costa Volpino | 4,594.46 mi (7,394.08 km) |
| Onalaska to Creazzo | 4,658.85 mi (7,497.69 km) |
| Onalaska to Crema | 4,599.38 mi (7,401.98 km) |
| Onalaska to Cremona | 4,622.77 mi (7,439.64 km) |
| Onalaska to Crevalcore | 4,683.09 mi (7,536.71 km) |
| Onalaska to Crispiano | 5,102.93 mi (8,212.37 km) |
| Onalaska to Crosia | 5,135.51 mi (8,264.80 km) |
| Onalaska to Crotone | 5,172.31 mi (8,324.02 km) |
| Onalaska to Cuneo | 4,561.27 mi (7,340.65 km) |
| Onalaska to Cuorgne | 4,521.68 mi (7,276.94 km) |
| Onalaska to Cusano Milanino | 4,572.61 mi (7,358.90 km) |
| Onalaska to Cutro | 5,169.66 mi (8,319.76 km) |
