| Guymon to Cividale del Friuli | 5,436.13 mi (8,748.60 km) |
| Guymon to Civita Castellana | 5,574.62 mi (8,971.48 km) |
| Guymon to Civitanova Marche | 5,577.48 mi (8,976.09 km) |
| Guymon to Civitavecchia | 5,560.40 mi (8,948.60 km) |
| Guymon to Civitella in Val di Chiana | 5,496.87 mi (8,846.36 km) |
| Guymon to Clusone | 5,319.87 mi (8,561.51 km) |
| Guymon to Coccaglio | 5,335.14 mi (8,586.08 km) |
| Guymon to Codigoro | 5,446.91 mi (8,765.96 km) |
| Guymon to Codogno | 5,342.90 mi (8,598.56 km) |
| Guymon to Codroipo | 5,426.29 mi (8,732.77 km) |
| Guymon to Cogoleto | 5,336.97 mi (8,589.03 km) |
| Guymon to Colle di Val d'Elsa | 5,475.63 mi (8,812.17 km) |
| Guymon to Colle Salvetti | 5,441.96 mi (8,757.99 km) |
| Guymon to Collecchio | 5,380.29 mi (8,658.74 km) |
| Guymon to Colleferro | 5,623.81 mi (9,050.66 km) |
