| Silver Spring to Cadiz | 3,765.10 mi (6,059.34 km) |
| Silver Spring to Calafell | 4,005.97 mi (6,446.99 km) |
| Silver Spring to Calahorra | 3,808.68 mi (6,129.48 km) |
| Silver Spring to Calasparra | 3,940.60 mi (6,341.78 km) |
| Silver Spring to Calatayud | 3,851.19 mi (6,197.89 km) |
| Silver Spring to Caldas de Montbuy | 4,020.69 mi (6,470.68 km) |
| Silver Spring to Caldas de Reyes | 3,485.75 mi (5,609.77 km) |
| Silver Spring to Calella | 4,044.20 mi (6,508.51 km) |
| Silver Spring to Callosa de Segura | 3,983.79 mi (6,411.29 km) |
| Silver Spring to Calpe | 4,012.19 mi (6,457.00 km) |
| Silver Spring to Calvia | 4,100.75 mi (6,599.52 km) |
| Silver Spring to Camas | 3,752.52 mi (6,039.10 km) |
| Silver Spring to Cambados | 3,480.52 mi (5,601.35 km) |
| Silver Spring to Cambre | 3,483.96 mi (5,606.89 km) |
| Silver Spring to Cambrils | 3,986.01 mi (6,414.87 km) |
