| Rockford to Spout Springs (North Carolina) | 723.69 mi (1,164.67 km) |
| Rockford to Spring (Texas) | 912.87 mi (1,469.12 km) |
| Rockford to Spring Creek (Nevada) | 1,371.46 mi (2,207.15 km) |
| Rockford to Spring Hill (Florida) | 1,019.95 mi (1,641.46 km) |
| Rockford to Spring Hill (Tennessee) | 464.76 mi (747.95 km) |
| Rockford to Spring Lake (North Carolina) | 729.47 mi (1,173.97 km) |
| Rockford to Spring Valley (California) | 1,656.00 mi (2,665.08 km) |
| Rockford to Spring Valley (Nevada) | 1,459.81 mi (2,349.34 km) |
| Rockford to Spring Valley (New York) | 777.77 mi (1,251.69 km) |
| Rockford to Springboro (Ohio) | 313.50 mi (504.53 km) |
| Rockford to Springdale (Arkansas) | 499.96 mi (804.61 km) |
| Rockford to Springdale (New Jersey) | 751.33 mi (1,209.16 km) |
| Rockford to Springdale (Ohio) | 315.67 mi (508.02 km) |
| Rockford to Springfield (Illinois) | 174.68 mi (281.12 km) |
| Rockford to Springfield (Massachusetts) | 844.70 mi (1,359.41 km) |
