| Irondale to Oerlinghausen | 4,642.88 mi (7,471.99 km) |
| Irondale to Oestrich-Winkel | 4,676.29 mi (7,525.76 km) |
| Irondale to Offenburg | 4,720.63 mi (7,597.13 km) |
| Irondale to Oftersheim | 4,719.04 mi (7,594.56 km) |
| Irondale to Ohrdruf | 4,757.79 mi (7,656.93 km) |
| Irondale to Ohringen | 4,761.14 mi (7,662.31 km) |
| Irondale to Olbernhau | 4,863.03 mi (7,826.28 km) |
| Irondale to Olching | 4,866.76 mi (7,832.29 km) |
| Irondale to Oldenburg | 4,590.77 mi (7,388.13 km) |
| Irondale to Oldenburg in Holstein | 4,654.36 mi (7,490.46 km) |
| Irondale to Olfen | 4,600.81 mi (7,404.30 km) |
| Irondale to Olpe | 4,639.05 mi (7,465.83 km) |
| Irondale to Olsberg | 4,654.39 mi (7,490.52 km) |
| Irondale to Oranienburg | 4,789.45 mi (7,707.88 km) |
| Irondale to Ortenberg | 4,707.19 mi (7,575.49 km) |
