| Castro Valley to Castrovillari | 6,463.13 mi (10,401.41 km) |
| Castro Valley to Catania | 6,566.52 mi (10,567.79 km) |
| Castro Valley to Catanzaro | 6,528.24 mi (10,506.19 km) |
| Castro Valley to Cattolica | 6,125.62 mi (9,858.23 km) |
| Castro Valley to Cava de' Tirreni | 6,369.26 mi (10,250.33 km) |
| Castro Valley to Cavallino | 6,488.28 mi (10,441.88 km) |
| Castro Valley to Cavarzere | 6,040.77 mi (9,721.69 km) |
| Castro Valley to Cave | 6,254.32 mi (10,065.35 km) |
| Castro Valley to Cavriago | 6,021.85 mi (9,691.23 km) |
| Castro Valley to Cavriglia | 6,115.80 mi (9,842.43 km) |
| Castro Valley to Cazzago San Martino | 5,957.98 mi (9,588.45 km) |
| Castro Valley to Ceccano | 6,280.17 mi (10,106.95 km) |
| Castro Valley to Cecina | 6,099.02 mi (9,815.43 km) |
| Castro Valley to Cefalu | 6,503.66 mi (10,466.63 km) |
| Castro Valley to Ceglie Messapico | 6,449.70 mi (10,379.79 km) |
