| Williamsport to Carrollwood (Florida) | 962.00 mi (1,548.18 km) |
| Williamsport to Carson (California) | 2,292.99 mi (3,690.20 km) |
| Williamsport to Carson City (Nevada) | 2,236.00 mi (3,598.49 km) |
| Williamsport to Carteret (New Jersey) | 153.47 mi (246.98 km) |
| Williamsport to Cartersville (Georgia) | 646.83 mi (1,040.97 km) |
| Williamsport to Carthage (Missouri) | 965.85 mi (1,554.38 km) |
| Williamsport to Cary (Illinois) | 581.65 mi (936.07 km) |
| Williamsport to Cary (North Carolina) | 389.20 mi (626.36 km) |
| Williamsport to Casa de Oro-Mount Helix (California) | 2,258.51 mi (3,634.72 km) |
| Williamsport to Casa Grande (Arizona) | 1,984.17 mi (3,193.22 km) |
| Williamsport to Casas Adobes (Arizona) | 1,963.38 mi (3,159.76 km) |
| Williamsport to Cascades (Virginia) | 152.68 mi (245.72 km) |
| Williamsport to Casper (Wyoming) | 1,499.14 mi (2,412.63 km) |
| Williamsport to Casselberry (Florida) | 901.93 mi (1,451.52 km) |
| Williamsport to Castaic (California) | 2,293.89 mi (3,691.66 km) |
