| Healdsburg to Cividale del Friuli | 5,988.23 mi (9,637.13 km) |
| Healdsburg to Civita Castellana | 6,180.93 mi (9,947.25 km) |
| Healdsburg to Civitanova Marche | 6,159.16 mi (9,912.20 km) |
| Healdsburg to Civitavecchia | 6,174.96 mi (9,937.64 km) |
| Healdsburg to Civitella in Val di Chiana | 6,097.01 mi (9,812.18 km) |
| Healdsburg to Clusone | 5,907.36 mi (9,506.98 km) |
| Healdsburg to Coccaglio | 5,926.24 mi (9,537.36 km) |
| Healdsburg to Codigoro | 6,026.60 mi (9,698.87 km) |
| Healdsburg to Codogno | 5,941.39 mi (9,561.74 km) |
| Healdsburg to Codroipo | 5,984.38 mi (9,630.93 km) |
| Healdsburg to Cogoleto | 5,954.50 mi (9,582.84 km) |
| Healdsburg to Colle di Val d'Elsa | 6,081.58 mi (9,787.35 km) |
| Healdsburg to Colle Salvetti | 6,051.76 mi (9,739.36 km) |
| Healdsburg to Collecchio | 5,978.95 mi (9,622.19 km) |
| Healdsburg to Colleferro | 6,230.52 mi (10,027.05 km) |
