| Effingham to Cortona | 4,890.36 mi (7,870.28 km) |
| Effingham to Cosenza | 5,233.36 mi (8,422.28 km) |
| Effingham to Cossato | 4,645.25 mi (7,475.80 km) |
| Effingham to Costa Volpino | 4,712.58 mi (7,584.17 km) |
| Effingham to Creazzo | 4,779.19 mi (7,691.36 km) |
| Effingham to Crema | 4,714.01 mi (7,586.47 km) |
| Effingham to Cremona | 4,737.17 mi (7,623.74 km) |
| Effingham to Crevalcore | 4,798.45 mi (7,722.35 km) |
| Effingham to Crispiano | 5,216.56 mi (8,395.25 km) |
| Effingham to Crosia | 5,242.97 mi (8,437.75 km) |
| Effingham to Crotone | 5,278.69 mi (8,495.22 km) |
| Effingham to Cuneo | 4,665.03 mi (7,507.64 km) |
| Effingham to Cuorgne | 4,630.99 mi (7,452.86 km) |
| Effingham to Cusano Milanino | 4,686.85 mi (7,542.75 km) |
| Effingham to Cutro | 5,275.38 mi (8,489.91 km) |
