| Rockford to Portage (Indiana) | 107.48 mi (172.97 km) |
| Rockford to Portage (Michigan) | 177.74 mi (286.04 km) |
| Rockford to Portage (Wisconsin) | 91.37 mi (147.05 km) |
| Rockford to Portales (New Mexico) | 953.88 mi (1,535.13 km) |
| Rockford to Porterville (California) | 1,652.20 mi (2,658.96 km) |
| Rockford to Portland (Maine) | 953.07 mi (1,533.82 km) |
| Rockford to Portland (Oregon) | 1,674.95 mi (2,695.58 km) |
| Rockford to Portland (Tennessee) | 414.33 mi (666.80 km) |
| Rockford to Portland (Texas) | 1,095.69 mi (1,763.34 km) |
| Rockford to Portsmouth (New Hampshire) | 928.70 mi (1,494.59 km) |
| Rockford to Portsmouth (Ohio) | 402.34 mi (647.51 km) |
| Rockford to Portsmouth (Virginia) | 772.36 mi (1,242.99 km) |
| Rockford to Post Falls (Idaho) | 1,404.85 mi (2,260.88 km) |
| Rockford to Potomac (Maryland) | 660.82 mi (1,063.48 km) |
| Rockford to Potomac Park (California) | 1,669.10 mi (2,686.16 km) |
