| Potomac to Jacksonville (North Carolina) | 296.28 mi (476.82 km) |
| Potomac to Jacksonville (Texas) | 1,124.36 mi (1,809.49 km) |
| Potomac to Jacksonville Beach (Florida) | 649.09 mi (1,044.61 km) |
| Potomac to James Island (South Carolina) | 460.17 mi (740.58 km) |
| Potomac to Jamestown (New York) | 238.49 mi (383.81 km) |
| Potomac to Jamestown (North Dakota) | 1,210.76 mi (1,948.53 km) |
| Potomac to Janesville (Wisconsin) | 667.02 mi (1,073.47 km) |
| Potomac to Jasmine Estates (Florida) | 804.95 mi (1,295.44 km) |
| Potomac to Jasper (Alabama) | 663.48 mi (1,067.76 km) |
| Potomac to Jasper (Indiana) | 526.99 mi (848.11 km) |
| Potomac to Jefferson (Georgia) | 489.60 mi (787.93 km) |
| Potomac to Jefferson (Louisiana) | 965.72 mi (1,554.18 km) |
| Potomac to Jefferson City (Missouri) | 806.50 mi (1,297.93 km) |
| Potomac to Jefferson Hills (Pennsylvania) | 170.36 mi (274.17 km) |
| Potomac to Jefferson Valley-Yorktown (New York) | 239.64 mi (385.66 km) |
