| Merrick to Oerlinghausen | 3,786.48 mi (6,093.76 km) |
| Merrick to Oestrich-Winkel | 3,814.13 mi (6,138.24 km) |
| Merrick to Offenburg | 3,855.18 mi (6,204.31 km) |
| Merrick to Oftersheim | 3,855.85 mi (6,205.40 km) |
| Merrick to Ohrdruf | 3,899.89 mi (6,276.26 km) |
| Merrick to Ohringen | 3,898.22 mi (6,273.58 km) |
| Merrick to Olbernhau | 4,007.04 mi (6,448.70 km) |
| Merrick to Olching | 4,003.02 mi (6,442.24 km) |
| Merrick to Oldenburg | 3,737.71 mi (6,015.26 km) |
| Merrick to Oldenburg in Holstein | 3,807.96 mi (6,128.31 km) |
| Merrick to Olfen | 3,742.66 mi (6,023.22 km) |
| Merrick to Olpe | 3,779.32 mi (6,082.22 km) |
| Merrick to Olsberg | 3,796.07 mi (6,109.18 km) |
| Merrick to Oranienburg | 3,939.92 mi (6,340.69 km) |
| Merrick to Ortenberg | 3,846.68 mi (6,190.63 km) |
