| Rockville to Isabela (Puerto Rico) | 1,546.37 mi (2,488.64 km) |
| Rockville to Iselin (New Jersey) | 182.26 mi (293.32 km) |
| Rockville to Isla Vista (California) | 2,364.42 mi (3,805.16 km) |
| Rockville to Issaquah (Washington) | 2,296.91 mi (3,696.51 km) |
| Rockville to Ithaca (New York) | 234.70 mi (377.71 km) |
| Rockville to Ives Estates (Florida) | 923.35 mi (1,485.99 km) |
| Rockville to Jackson (Michigan) | 437.93 mi (704.79 km) |
| Rockville to Jackson (Mississippi) | 867.77 mi (1,396.54 km) |
| Rockville to Jackson (Missouri) | 687.82 mi (1,106.95 km) |
| Rockville to Jackson (Tennessee) | 683.12 mi (1,099.37 km) |
| Rockville to Jackson (Wyoming) | 1,759.49 mi (2,831.63 km) |
| Rockville to Jacksonville (Alabama) | 600.56 mi (966.50 km) |
| Rockville to Jacksonville (Arkansas) | 874.77 mi (1,407.81 km) |
| Rockville to Jacksonville (Florida) | 656.64 mi (1,056.76 km) |
| Rockville to Jacksonville (Illinois) | 698.90 mi (1,124.77 km) |
