| Rockford to San Diego (California) | 1,659.65 mi (2,670.94 km) |
| Rockford to San Diego Country Estates (California) | 1,636.66 mi (2,633.95 km) |
| Rockford to San Dimas (California) | 1,650.08 mi (2,655.55 km) |
| Rockford to San Fernando (California) | 1,675.79 mi (2,696.92 km) |
| Rockford to San Francisco (California) | 1,782.04 mi (2,867.92 km) |
| Rockford to San Gabriel (California) | 1,665.11 mi (2,679.74 km) |
| Rockford to San Germán (Puerto Rico) | 2,112.46 mi (3,399.68 km) |
| Rockford to San Jacinto (California) | 1,619.47 mi (2,606.28 km) |
| Rockford to San Jose (California) | 1,762.81 mi (2,836.96 km) |
| Rockford to San Juan (Puerto Rico) | 2,130.18 mi (3,428.20 km) |
| Rockford to San Juan (Texas) | 1,223.87 mi (1,969.63 km) |
| Rockford to San Juan Capistrano (California) | 1,662.73 mi (2,675.90 km) |
| Rockford to San Leandro (California) | 1,768.65 mi (2,846.37 km) |
| Rockford to San Lorenzo (California) | 1,768.12 mi (2,845.51 km) |
| Rockford to San Luis (Arizona) | 1,553.27 mi (2,499.75 km) |
