| Petaluma to Cividale del Friuli | 6,005.05 mi (9,664.19 km) |
| Petaluma to Civita Castellana | 6,196.60 mi (9,972.47 km) |
| Petaluma to Civitanova Marche | 6,175.41 mi (9,938.36 km) |
| Petaluma to Civitavecchia | 6,190.43 mi (9,962.53 km) |
| Petaluma to Civitella in Val di Chiana | 6,112.77 mi (9,837.55 km) |
| Petaluma to Clusone | 5,923.28 mi (9,532.60 km) |
| Petaluma to Coccaglio | 5,942.09 mi (9,562.86 km) |
| Petaluma to Codigoro | 6,042.80 mi (9,724.94 km) |
| Petaluma to Codogno | 5,957.07 mi (9,586.97 km) |
| Petaluma to Codroipo | 6,001.06 mi (9,657.77 km) |
| Petaluma to Cogoleto | 5,969.71 mi (9,607.32 km) |
| Petaluma to Colle di Val d'Elsa | 6,097.18 mi (9,812.47 km) |
| Petaluma to Colle Salvetti | 6,067.24 mi (9,764.29 km) |
| Petaluma to Collecchio | 5,994.65 mi (9,647.46 km) |
| Petaluma to Colleferro | 6,246.22 mi (10,052.32 km) |
