| Norridge to Oerlinghausen | 4,259.45 mi (6,854.92 km) |
| Norridge to Oestrich-Winkel | 4,309.48 mi (6,935.44 km) |
| Norridge to Offenburg | 4,365.76 mi (7,026.01 km) |
| Norridge to Oftersheim | 4,355.35 mi (7,009.26 km) |
| Norridge to Ohrdruf | 4,377.21 mi (7,044.44 km) |
| Norridge to Ohringen | 4,396.07 mi (7,074.80 km) |
| Norridge to Olbernhau | 4,476.28 mi (7,203.88 km) |
| Norridge to Olching | 4,503.61 mi (7,247.86 km) |
| Norridge to Oldenburg | 4,199.70 mi (6,758.76 km) |
| Norridge to Oldenburg in Holstein | 4,248.48 mi (6,837.27 km) |
| Norridge to Olfen | 4,222.58 mi (6,795.59 km) |
| Norridge to Olpe | 4,264.96 mi (6,863.80 km) |
| Norridge to Olsberg | 4,276.06 mi (6,881.65 km) |
| Norridge to Oranienburg | 4,388.51 mi (7,062.62 km) |
| Norridge to Ortenberg | 4,334.75 mi (6,976.11 km) |
