| Williamsport to Jacksonville (North Carolina) | 450.29 mi (724.66 km) |
| Williamsport to Jacksonville (Texas) | 1,193.15 mi (1,920.19 km) |
| Williamsport to Jacksonville Beach (Florida) | 795.68 mi (1,280.53 km) |
| Williamsport to James Island (South Carolina) | 608.95 mi (980.00 km) |
| Williamsport to Jamestown (New York) | 128.06 mi (206.10 km) |
| Williamsport to Jamestown (North Dakota) | 1,139.61 mi (1,834.03 km) |
| Williamsport to Janesville (Wisconsin) | 622.81 mi (1,002.32 km) |
| Williamsport to Jasmine Estates (Florida) | 949.78 mi (1,528.52 km) |
| Williamsport to Jasper (Alabama) | 757.26 mi (1,218.70 km) |
| Williamsport to Jasper (Indiana) | 560.76 mi (902.45 km) |
| Williamsport to Jefferson (Georgia) | 607.59 mi (977.82 km) |
| Williamsport to Jefferson (Louisiana) | 1,070.14 mi (1,722.22 km) |
| Williamsport to Jefferson City (Missouri) | 822.22 mi (1,323.23 km) |
| Williamsport to Jefferson Hills (Pennsylvania) | 165.06 mi (265.64 km) |
| Williamsport to Jefferson Valley-Yorktown (New York) | 168.11 mi (270.55 km) |
