| Guymon to Cortona | 5,513.55 mi (8,873.20 km) |
| Guymon to Cosenza | 5,862.70 mi (9,435.11 km) |
| Guymon to Cossato | 5,267.39 mi (8,477.04 km) |
| Guymon to Costa Volpino | 5,327.71 mi (8,574.13 km) |
| Guymon to Creazzo | 5,391.83 mi (8,677.32 km) |
| Guymon to Crema | 5,332.92 mi (8,582.51 km) |
| Guymon to Cremona | 5,356.33 mi (8,620.18 km) |
| Guymon to Crevalcore | 5,416.55 mi (8,717.10 km) |
| Guymon to Crispiano | 5,836.38 mi (9,392.74 km) |
| Guymon to Crosia | 5,869.34 mi (9,445.80 km) |
| Guymon to Crotone | 5,906.18 mi (9,505.08 km) |
| Guymon to Cuneo | 5,295.26 mi (8,521.90 km) |
| Guymon to Cuorgne | 5,255.55 mi (8,457.99 km) |
| Guymon to Cusano Milanino | 5,306.19 mi (8,539.49 km) |
| Guymon to Cutro | 5,903.56 mi (9,500.86 km) |
