| Keller to Oerlinghausen | 5,067.60 mi (8,155.52 km) |
| Keller to Oestrich-Winkel | 5,116.39 mi (8,234.04 km) |
| Keller to Offenburg | 5,171.22 mi (8,322.27 km) |
| Keller to Oftersheim | 5,161.96 mi (8,307.37 km) |
| Keller to Ohrdruf | 5,185.27 mi (8,344.88 km) |
| Keller to Ohringen | 5,202.87 mi (8,373.20 km) |
| Keller to Olbernhau | 5,284.62 mi (8,504.77 km) |
| Keller to Olching | 5,310.27 mi (8,546.05 km) |
| Keller to Oldenburg | 5,008.08 mi (8,059.73 km) |
| Keller to Oldenburg in Holstein | 5,056.64 mi (8,137.88 km) |
| Keller to Olfen | 5,030.43 mi (8,095.70 km) |
| Keller to Olpe | 5,072.53 mi (8,163.45 km) |
| Keller to Olsberg | 5,083.94 mi (8,181.81 km) |
| Keller to Oranienburg | 5,196.83 mi (8,363.48 km) |
| Keller to Ortenberg | 5,142.22 mi (8,275.61 km) |
