| Rockford to Reading (Pennsylvania) | 693.96 mi (1,116.82 km) |
| Rockford to Red Bank (New Jersey) | 788.45 mi (1,268.89 km) |
| Rockford to Red Bank (Tennessee) | 533.89 mi (859.22 km) |
| Rockford to Red Bluff (California) | 1,719.44 mi (2,767.17 km) |
| Rockford to Red Hill (South Carolina) | 800.65 mi (1,288.52 km) |
| Rockford to Red Oak (Texas) | 794.46 mi (1,278.56 km) |
| Rockford to Red Wing (Minnesota) | 239.32 mi (385.15 km) |
| Rockford to Redan (Georgia) | 646.01 mi (1,039.65 km) |
| Rockford to Redding (California) | 1,718.47 mi (2,765.61 km) |
| Rockford to Redland (Maryland) | 659.91 mi (1,062.02 km) |
| Rockford to Redlands (California) | 1,619.93 mi (2,607.03 km) |
| Rockford to Redmond (Oregon) | 1,611.59 mi (2,593.60 km) |
| Rockford to Redmond (Washington) | 1,645.11 mi (2,647.56 km) |
| Rockford to Redondo Beach (California) | 1,686.91 mi (2,714.82 km) |
| Rockford to Redwood City (California) | 1,777.05 mi (2,859.88 km) |
