| Rockford to Petaluma (California) | 1,779.74 mi (2,864.22 km) |
| Rockford to Petersburg (Virginia) | 710.90 mi (1,144.09 km) |
| Rockford to Pflugerville (Texas) | 942.91 mi (1,517.47 km) |
| Rockford to Pharr (Texas) | 1,226.18 mi (1,973.34 km) |
| Rockford to Phelan (California) | 1,624.96 mi (2,615.12 km) |
| Rockford to Phenix City (Alabama) | 712.35 mi (1,146.42 km) |
| Rockford to Philadelphia (Pennsylvania) | 740.52 mi (1,191.75 km) |
| Rockford to Phillipsburg (New Jersey) | 725.94 mi (1,168.30 km) |
| Rockford to Phoenix (Arizona) | 1,385.24 mi (2,229.33 km) |
| Rockford to Phoenixville (Pennsylvania) | 718.43 mi (1,156.20 km) |
| Rockford to Picayune (Mississippi) | 810.98 mi (1,305.15 km) |
| Rockford to Pickerington (Ohio) | 366.44 mi (589.73 km) |
| Rockford to Pico Rivera (California) | 1,668.05 mi (2,684.47 km) |
| Rockford to Piedmont (California) | 1,769.44 mi (2,847.64 km) |
| Rockford to Pierre (South Dakota) | 583.90 mi (939.70 km) |
