| Boone to Cividale del Friuli | 4,692.66 mi (7,552.10 km) |
| Boone to Civita Castellana | 4,781.16 mi (7,694.53 km) |
| Boone to Civitanova Marche | 4,803.31 mi (7,730.19 km) |
| Boone to Civitavecchia | 4,761.11 mi (7,662.26 km) |
| Boone to Civitella in Val di Chiana | 4,711.86 mi (7,583.00 km) |
| Boone to Clusone | 4,553.49 mi (7,328.14 km) |
| Boone to Coccaglio | 4,565.08 mi (7,346.79 km) |
| Boone to Codigoro | 4,680.61 mi (7,532.71 km) |
| Boone to Codogno | 4,566.49 mi (7,349.05 km) |
| Boone to Codroipo | 4,678.46 mi (7,529.25 km) |
| Boone to Cogoleto | 4,545.54 mi (7,315.34 km) |
| Boone to Colle di Val d'Elsa | 4,686.98 mi (7,542.97 km) |
| Boone to Colle Salvetti | 4,651.81 mi (7,486.37 km) |
| Boone to Collecchio | 4,601.95 mi (7,406.12 km) |
| Boone to Colleferro | 4,827.83 mi (7,769.64 km) |
