| Rockford to Nyon | 4,415.99 mi (7,106.85 km) |
| Rockford to Oberriet | 4,506.59 mi (7,252.66 km) |
| Rockford to Obersiggenthal | 4,451.42 mi (7,163.87 km) |
| Rockford to Oberwil | 4,422.27 mi (7,116.96 km) |
| Rockford to Oberwingert | 4,468.29 mi (7,191.02 km) |
| Rockford to Oftringen | 4,443.94 mi (7,151.84 km) |
| Rockford to Olten | 4,441.97 mi (7,148.67 km) |
| Rockford to Onex | 4,418.67 mi (7,111.16 km) |
| Rockford to Opfikon | 4,464.00 mi (7,184.12 km) |
| Rockford to Ostermundigen | 4,442.02 mi (7,148.75 km) |
| Rockford to Payerne | 4,426.07 mi (7,123.07 km) |
| Rockford to Pfaffikon | 4,474.91 mi (7,201.67 km) |
| Rockford to Plan-les-Ouates | 4,419.98 mi (7,113.27 km) |
| Rockford to Pratteln | 4,427.69 mi (7,125.68 km) |
| Rockford to Prilly | 4,424.37 mi (7,120.33 km) |
