| Oro Valley to Cividale del Friuli | 5,998.42 mi (9,653.52 km) |
| Oro Valley to Civita Castellana | 6,150.28 mi (9,897.92 km) |
| Oro Valley to Civitanova Marche | 6,147.64 mi (9,893.67 km) |
| Oro Valley to Civitavecchia | 6,137.77 mi (9,877.78 km) |
| Oro Valley to Civitella in Val di Chiana | 6,070.74 mi (9,769.90 km) |
| Oro Valley to Clusone | 5,889.84 mi (9,478.78 km) |
| Oro Valley to Coccaglio | 5,906.02 mi (9,504.83 km) |
| Oro Valley to Codigoro | 6,015.84 mi (9,681.55 km) |
| Oro Valley to Codogno | 5,915.51 mi (9,520.09 km) |
| Oro Valley to Codroipo | 5,989.97 mi (9,639.93 km) |
| Oro Valley to Cogoleto | 5,913.76 mi (9,517.27 km) |
| Oro Valley to Colle di Val d'Elsa | 6,050.66 mi (9,737.59 km) |
| Oro Valley to Colle Salvetti | 6,017.64 mi (9,684.46 km) |
| Oro Valley to Collecchio | 5,953.15 mi (9,580.67 km) |
| Oro Valley to Colleferro | 6,199.83 mi (9,977.67 km) |
