| Lake in the Hills to Oerlinghausen | 4,266.83 mi (6,866.80 km) |
| Lake in the Hills to Oestrich-Winkel | 4,317.98 mi (6,949.12 km) |
| Lake in the Hills to Offenburg | 4,375.02 mi (7,040.92 km) |
| Lake in the Hills to Oftersheim | 4,364.04 mi (7,023.24 km) |
| Lake in the Hills to Ohrdruf | 4,384.73 mi (7,056.54 km) |
| Lake in the Hills to Ohringen | 4,404.64 mi (7,088.58 km) |
| Lake in the Hills to Olbernhau | 4,483.31 mi (7,215.20 km) |
| Lake in the Hills to Olching | 4,512.24 mi (7,261.75 km) |
| Lake in the Hills to Oldenburg | 4,206.58 mi (6,769.83 km) |
| Lake in the Hills to Oldenburg in Holstein | 4,254.25 mi (6,846.55 km) |
| Lake in the Hills to Olfen | 4,230.35 mi (6,808.10 km) |
| Lake in the Hills to Olpe | 4,273.00 mi (6,876.72 km) |
| Lake in the Hills to Olsberg | 4,283.79 mi (6,894.09 km) |
| Lake in the Hills to Oranienburg | 4,394.56 mi (7,072.37 km) |
| Lake in the Hills to Ortenberg | 4,342.86 mi (6,989.15 km) |
