| Johnston to Cadiz | 4,489.84 mi (7,225.70 km) |
| Johnston to Calafell | 4,648.38 mi (7,480.84 km) |
| Johnston to Calahorra | 4,455.70 mi (7,170.75 km) |
| Johnston to Calasparra | 4,628.61 mi (7,449.03 km) |
| Johnston to Calatayud | 4,507.00 mi (7,253.31 km) |
| Johnston to Caldas de Montbuy | 4,655.64 mi (7,492.52 km) |
| Johnston to Caldas de Reyes | 4,157.86 mi (6,691.43 km) |
| Johnston to Calella | 4,676.90 mi (7,526.74 km) |
| Johnston to Callosa de Segura | 4,669.04 mi (7,514.10 km) |
| Johnston to Calpe | 4,687.97 mi (7,544.56 km) |
| Johnston to Calvia | 4,755.46 mi (7,653.18 km) |
| Johnston to Camas | 4,467.96 mi (7,190.49 km) |
| Johnston to Cambados | 4,154.45 mi (6,685.95 km) |
| Johnston to Cambre | 4,147.01 mi (6,673.97 km) |
| Johnston to Cambrils | 4,632.28 mi (7,454.93 km) |
