| Effingham to Cividale del Friuli | 4,832.69 mi (7,777.46 km) |
| Effingham to Civita Castellana | 4,947.72 mi (7,962.59 km) |
| Effingham to Civitanova Marche | 4,959.84 mi (7,982.08 km) |
| Effingham to Civitavecchia | 4,930.67 mi (7,935.15 km) |
| Effingham to Civitella in Val di Chiana | 4,873.60 mi (7,843.30 km) |
| Effingham to Clusone | 4,704.60 mi (7,571.32 km) |
| Effingham to Coccaglio | 4,718.18 mi (7,593.17 km) |
| Effingham to Codigoro | 4,832.37 mi (7,776.95 km) |
| Effingham to Codogno | 4,722.93 mi (7,600.82 km) |
| Effingham to Codroipo | 4,820.65 mi (7,758.09 km) |
| Effingham to Cogoleto | 4,709.83 mi (7,579.74 km) |
| Effingham to Colle di Val d'Elsa | 4,850.52 mi (7,806.16 km) |
| Effingham to Colle Salvetti | 4,815.96 mi (7,750.55 km) |
| Effingham to Collecchio | 4,759.59 mi (7,659.83 km) |
| Effingham to Colleferro | 4,995.96 mi (8,040.23 km) |
