| Clinton to Oerlinghausen | 4,006.57 mi (6,447.96 km) |
| Clinton to Oestrich-Winkel | 4,035.02 mi (6,493.74 km) |
| Clinton to Offenburg | 4,076.41 mi (6,560.36 km) |
| Clinton to Oftersheim | 4,076.87 mi (6,561.09 km) |
| Clinton to Ohrdruf | 4,120.22 mi (6,630.85 km) |
| Clinton to Ohringen | 4,119.21 mi (6,629.23 km) |
| Clinton to Olbernhau | 4,227.10 mi (6,802.86 km) |
| Clinton to Olching | 4,224.10 mi (6,798.03 km) |
| Clinton to Oldenburg | 3,957.26 mi (6,368.59 km) |
| Clinton to Oldenburg in Holstein | 4,026.36 mi (6,479.80 km) |
| Clinton to Olfen | 3,963.01 mi (6,377.84 km) |
| Clinton to Olpe | 3,999.89 mi (6,437.21 km) |
| Clinton to Olsberg | 4,016.45 mi (6,463.85 km) |
| Clinton to Oranienburg | 4,158.91 mi (6,693.12 km) |
| Clinton to Ortenberg | 4,067.37 mi (6,545.79 km) |
