| Ukiah to Cividale del Friuli | 5,965.33 mi (9,600.26 km) |
| Ukiah to Civita Castellana | 6,159.62 mi (9,912.96 km) |
| Ukiah to Civitanova Marche | 6,137.03 mi (9,876.60 km) |
| Ukiah to Civitavecchia | 6,153.95 mi (9,903.82 km) |
| Ukiah to Civitella in Val di Chiana | 6,075.58 mi (9,777.71 km) |
| Ukiah to Clusone | 5,885.73 mi (9,472.17 km) |
| Ukiah to Coccaglio | 5,904.71 mi (9,502.71 km) |
| Ukiah to Codigoro | 6,004.56 mi (9,663.41 km) |
| Ukiah to Codogno | 5,920.09 mi (9,527.47 km) |
| Ukiah to Codroipo | 5,961.68 mi (9,594.39 km) |
| Ukiah to Cogoleto | 5,933.85 mi (9,549.60 km) |
| Ukiah to Colle di Val d'Elsa | 6,060.37 mi (9,753.23 km) |
| Ukiah to Colle Salvetti | 6,030.72 mi (9,705.51 km) |
| Ukiah to Collecchio | 5,957.61 mi (9,587.85 km) |
| Ukiah to Colleferro | 6,209.17 mi (9,992.69 km) |
