| Williamsport to Cividale del Friuli | 4,278.20 mi (6,885.10 km) |
| Williamsport to Civita Castellana | 4,375.05 mi (7,040.96 km) |
| Williamsport to Civitanova Marche | 4,393.86 mi (7,071.23 km) |
| Williamsport to Civitavecchia | 4,356.04 mi (7,010.37 km) |
| Williamsport to Civitella in Val di Chiana | 4,304.00 mi (6,926.62 km) |
| Williamsport to Clusone | 4,142.04 mi (6,665.97 km) |
| Williamsport to Coccaglio | 4,154.25 mi (6,685.61 km) |
| Williamsport to Codigoro | 4,269.51 mi (6,871.11 km) |
| Williamsport to Codogno | 4,156.71 mi (6,689.57 km) |
| Williamsport to Codroipo | 4,264.57 mi (6,863.17 km) |
| Williamsport to Cogoleto | 4,138.34 mi (6,660.01 km) |
| Williamsport to Colle di Val d'Elsa | 4,279.70 mi (6,887.52 km) |
| Williamsport to Colle Salvetti | 4,244.70 mi (6,831.18 km) |
| Williamsport to Collecchio | 4,192.60 mi (6,747.34 km) |
| Williamsport to Colleferro | 4,422.33 mi (7,117.06 km) |
