| Williamsport to Cadillac (Michigan) | 472.99 mi (761.20 km) |
| Williamsport to Caguas (Puerto Rico) | 1,717.71 mi (2,764.38 km) |
| Williamsport to Cahokia (Illinois) | 719.90 mi (1,158.56 km) |
| Williamsport to Calabasas (California) | 2,305.69 mi (3,710.66 km) |
| Williamsport to Caldwell (Idaho) | 2,007.85 mi (3,231.33 km) |
| Williamsport to Caledonia (Wisconsin) | 566.29 mi (911.35 km) |
| Williamsport to Calera (Alabama) | 773.54 mi (1,244.89 km) |
| Williamsport to Calexico (California) | 2,184.44 mi (3,515.52 km) |
| Williamsport to Calhoun (Georgia) | 634.42 mi (1,021.00 km) |
| Williamsport to California (Maryland) | 205.37 mi (330.51 km) |
| Williamsport to California City (California) | 2,235.64 mi (3,597.92 km) |
| Williamsport to Callaway (Florida) | 902.96 mi (1,453.18 km) |
| Williamsport to Calumet City (Illinois) | 544.94 mi (877.00 km) |
| Williamsport to Calverton (Maryland) | 150.84 mi (242.75 km) |
| Williamsport to Camano (Washington) | 2,247.48 mi (3,616.96 km) |
