| Rockford to Oschatz | 4,470.71 mi (7,194.91 km) |
| Rockford to Oschersleben | 4,377.24 mi (7,044.48 km) |
| Rockford to Osnabruck | 4,254.91 mi (6,847.62 km) |
| Rockford to Ostbevern | 4,256.97 mi (6,850.94 km) |
| Rockford to Osterburg | 4,364.26 mi (7,023.61 km) |
| Rockford to Ostercappeln | 4,258.84 mi (6,853.94 km) |
| Rockford to Osterhofen | 4,576.43 mi (7,365.06 km) |
| Rockford to Osterholz-Scharmbeck | 4,245.60 mi (6,832.63 km) |
| Rockford to Osternienburg | 4,412.51 mi (7,101.25 km) |
| Rockford to Osterode | 4,353.93 mi (7,006.97 km) |
| Rockford to Osterwieck | 4,360.71 mi (7,017.89 km) |
| Rockford to Ostfildern | 4,437.29 mi (7,141.12 km) |
| Rockford to Osthofen | 4,364.55 mi (7,024.06 km) |
| Rockford to Ostrhauderfehn | 4,208.30 mi (6,772.60 km) |
| Rockford to Ostringen | 4,397.91 mi (7,077.76 km) |
