| South Portland to Jacksonville (North Carolina) | 722.61 mi (1,162.92 km) |
| South Portland to Jacksonville (Texas) | 1,574.61 mi (2,534.08 km) |
| South Portland to Jacksonville Beach (Florida) | 1,105.78 mi (1,779.58 km) |
| South Portland to James Island (South Carolina) | 915.85 mi (1,473.92 km) |
| South Portland to Jamestown (New York) | 465.08 mi (748.47 km) |
| South Portland to Jamestown (North Dakota) | 1,391.75 mi (2,239.80 km) |
| South Portland to Janesville (Wisconsin) | 943.96 mi (1,519.16 km) |
| South Portland to Jasmine Estates (Florida) | 1,263.32 mi (2,033.11 km) |
| South Portland to Jasper (Alabama) | 1,133.92 mi (1,824.86 km) |
| South Portland to Jasper (Indiana) | 938.38 mi (1,510.17 km) |
| South Portland to Jefferson (Georgia) | 968.78 mi (1,559.11 km) |
| South Portland to Jefferson (Louisiana) | 1,442.37 mi (2,321.27 km) |
| South Portland to Jefferson City (Missouri) | 1,188.00 mi (1,911.89 km) |
| South Portland to Jefferson Hills (Pennsylvania) | 546.06 mi (878.79 km) |
| South Portland to Jefferson Valley-Yorktown (New York) | 239.88 mi (386.04 km) |
