| Rockford to Orthez | 4,241.82 mi (6,826.55 km) |
| Rockford to Orvault | 4,070.14 mi (6,550.26 km) |
| Rockford to Osny | 4,152.65 mi (6,683.05 km) |
| Rockford to Ostwald | 4,387.21 mi (7,060.54 km) |
| Rockford to Ouistreham | 4,054.74 mi (6,525.48 km) |
| Rockford to Oullins | 4,385.99 mi (7,058.58 km) |
| Rockford to Outreau | 4,076.46 mi (6,560.43 km) |
| Rockford to Oyonnax | 4,398.35 mi (7,078.45 km) |
| Rockford to Ozoir-la-Ferriere | 4,186.71 mi (6,737.86 km) |
| Rockford to Pace | 4,033.76 mi (6,491.70 km) |
| Rockford to Palaiseau | 4,172.20 mi (6,714.51 km) |
| Rockford to Pamiers | 4,356.06 mi (7,010.41 km) |
| Rockford to Panazol | 4,240.63 mi (6,824.64 km) |
| Rockford to Pantin | 4,171.64 mi (6,713.60 km) |
| Rockford to Paray-le-Monial | 4,330.16 mi (6,968.72 km) |
