| Rancho Santa Margarita to Jeffersontown (Kentucky) | 1,810.54 mi (2,913.79 km) |
| Rancho Santa Margarita to Jeffersonville (Indiana) | 1,803.41 mi (2,902.31 km) |
| Rancho Santa Margarita to Jenison (Michigan) | 1,825.59 mi (2,938.00 km) |
| Rancho Santa Margarita to Jenks (Oklahoma) | 1,234.96 mi (1,987.48 km) |
| Rancho Santa Margarita to Jennings (Missouri) | 1,558.29 mi (2,507.82 km) |
| Rancho Santa Margarita to Jensen Beach (Florida) | 2,256.15 mi (3,630.92 km) |
| Rancho Santa Margarita to Jericho (New York) | 2,447.84 mi (3,939.41 km) |
| Rancho Santa Margarita to Jerome (Idaho) | 649.61 mi (1,045.44 km) |
| Rancho Santa Margarita to Jersey City (New Jersey) | 2,420.51 mi (3,895.43 km) |
| Rancho Santa Margarita to Jessup (Maryland) | 2,282.77 mi (3,673.76 km) |
| Rancho Santa Margarita to Johns Creek (Georgia) | 1,908.31 mi (3,071.14 km) |
| Rancho Santa Margarita to Johnson City (New York) | 2,320.76 mi (3,734.90 km) |
| Rancho Santa Margarita to Johnson City (Tennessee) | 1,991.40 mi (3,204.84 km) |
| Rancho Santa Margarita to Johnston (Iowa) | 1,413.62 mi (2,274.99 km) |
| Rancho Santa Margarita to Johnstown (Colorado) | 837.04 mi (1,347.09 km) |
