| Romeoville to Reading (Pennsylvania) | 640.59 mi (1,030.93 km) |
| Romeoville to Red Bank (New Jersey) | 736.36 mi (1,185.06 km) |
| Romeoville to Red Bank (Tennessee) | 475.33 mi (764.96 km) |
| Romeoville to Red Bluff (California) | 1,774.14 mi (2,855.20 km) |
| Romeoville to Red Hill (South Carolina) | 734.88 mi (1,182.67 km) |
| Romeoville to Red Oak (Texas) | 789.99 mi (1,271.37 km) |
| Romeoville to Red Wing (Minnesota) | 305.13 mi (491.06 km) |
| Romeoville to Redan (Georgia) | 586.05 mi (943.16 km) |
| Romeoville to Redding (California) | 1,773.77 mi (2,854.61 km) |
| Romeoville to Redland (Maryland) | 601.27 mi (967.65 km) |
| Romeoville to Redlands (California) | 1,661.20 mi (2,673.45 km) |
| Romeoville to Redmond (Oregon) | 1,671.52 mi (2,690.05 km) |
| Romeoville to Redmond (Washington) | 1,708.41 mi (2,749.42 km) |
| Romeoville to Redondo Beach (California) | 1,728.83 mi (2,782.28 km) |
| Romeoville to Redwood City (California) | 1,827.70 mi (2,941.40 km) |
