| Rockford to Owosso (Michigan) | 253.60 mi (408.13 km) |
| Rockford to Oxford (Alabama) | 623.23 mi (1,003.00 km) |
| Rockford to Oxford (Mississippi) | 546.21 mi (879.05 km) |
| Rockford to Oxford (Ohio) | 295.07 mi (474.86 km) |
| Rockford to Oxnard (California) | 1,716.39 mi (2,762.27 km) |
| Rockford to Oxon Hill (Maryland) | 678.06 mi (1,091.23 km) |
| Rockford to Ozark (Alabama) | 770.15 mi (1,239.43 km) |
| Rockford to Ozark (Missouri) | 422.98 mi (680.72 km) |
| Rockford to Pace (Florida) | 811.12 mi (1,305.38 km) |
| Rockford to Pacific Grove (California) | 1,784.57 mi (2,872.00 km) |
| Rockford to Pacifica (California) | 1,787.28 mi (2,876.35 km) |
| Rockford to Paducah (Kentucky) | 359.18 mi (578.05 km) |
| Rockford to Pahrump (Nevada) | 1,493.29 mi (2,403.22 km) |
| Rockford to Painesville (Ohio) | 402.65 mi (648.00 km) |
| Rockford to Palatine (Illinois) | 53.18 mi (85.58 km) |
