| Red Oak to Oerlinghausen | 5,074.18 mi (8,166.10 km) |
| Red Oak to Oestrich-Winkel | 5,121.68 mi (8,242.54 km) |
| Red Oak to Offenburg | 5,175.60 mi (8,329.32 km) |
| Red Oak to Oftersheim | 5,167.01 mi (8,315.50 km) |
| Red Oak to Ohrdruf | 5,191.67 mi (8,355.19 km) |
| Red Oak to Ohringen | 5,208.05 mi (8,381.54 km) |
| Red Oak to Olbernhau | 5,291.57 mi (8,515.96 km) |
| Red Oak to Olching | 5,315.35 mi (8,554.23 km) |
| Red Oak to Oldenburg | 5,015.25 mi (8,071.26 km) |
| Red Oak to Oldenburg in Holstein | 5,065.05 mi (8,151.42 km) |
| Red Oak to Olfen | 5,036.57 mi (8,105.58 km) |
| Red Oak to Olpe | 5,078.37 mi (8,172.84 km) |
| Red Oak to Olsberg | 5,090.12 mi (8,191.75 km) |
| Red Oak to Oranienburg | 5,204.90 mi (8,376.48 km) |
| Red Oak to Ortenberg | 5,147.96 mi (8,284.84 km) |
