| Williamsport to Clarksdale (Mississippi) | 883.86 mi (1,422.43 km) |
| Williamsport to Clarkston (Georgia) | 646.94 mi (1,041.15 km) |
| Williamsport to Clarksville (Indiana) | 505.19 mi (813.03 km) |
| Williamsport to Clarksville (Tennessee) | 640.53 mi (1,030.83 km) |
| Williamsport to Clawson (Michigan) | 326.88 mi (526.06 km) |
| Williamsport to Clay (Alabama) | 738.89 mi (1,189.12 km) |
| Williamsport to Clayton (California) | 2,374.60 mi (3,821.54 km) |
| Williamsport to Clayton (Missouri) | 725.85 mi (1,168.15 km) |
| Williamsport to Clayton (North Carolina) | 393.09 mi (632.62 km) |
| Williamsport to Clayton (Ohio) | 394.23 mi (634.44 km) |
| Williamsport to Clearfield (Utah) | 1,807.18 mi (2,908.38 km) |
| Williamsport to Clearlake (California) | 2,387.22 mi (3,841.87 km) |
| Williamsport to Clearwater (Florida) | 971.76 mi (1,563.89 km) |
| Williamsport to Cleburne (Texas) | 1,279.13 mi (2,058.55 km) |
| Williamsport to Clemmons (North Carolina) | 402.60 mi (647.92 km) |
