| Prairie Ridge to Oerlinghausen | 4,997.51 mi (8,042.72 km) |
| Prairie Ridge to Oestrich-Winkel | 5,096.12 mi (8,201.41 km) |
| Prairie Ridge to Offenburg | 5,183.65 mi (8,342.28 km) |
| Prairie Ridge to Oftersheim | 5,146.84 mi (8,283.03 km) |
| Prairie Ridge to Ohrdruf | 5,111.40 mi (8,226.01 km) |
| Prairie Ridge to Ohringen | 5,178.72 mi (8,334.34 km) |
| Prairie Ridge to Olbernhau | 5,178.58 mi (8,334.12 km) |
| Prairie Ridge to Olching | 5,280.69 mi (8,498.45 km) |
| Prairie Ridge to Oldenburg | 4,918.92 mi (7,916.23 km) |
| Prairie Ridge to Oldenburg in Holstein | 4,910.10 mi (7,902.04 km) |
| Prairie Ridge to Olfen | 4,982.08 mi (8,017.89 km) |
| Prairie Ridge to Olpe | 5,033.17 mi (8,100.11 km) |
| Prairie Ridge to Olsberg | 5,029.12 mi (8,093.59 km) |
| Prairie Ridge to Oranienburg | 5,051.32 mi (8,129.32 km) |
| Prairie Ridge to Ortenberg | 5,100.47 mi (8,208.42 km) |
