| West Haven to Oerlinghausen | 3,735.10 mi (6,011.06 km) |
| West Haven to Oestrich-Winkel | 3,763.29 mi (6,056.43 km) |
| West Haven to Offenburg | 3,804.79 mi (6,123.22 km) |
| West Haven to Oftersheim | 3,805.15 mi (6,123.79 km) |
| West Haven to Ohrdruf | 3,848.63 mi (6,193.78 km) |
| West Haven to Ohringen | 3,847.48 mi (6,191.93 km) |
| West Haven to Olbernhau | 3,955.64 mi (6,365.98 km) |
| West Haven to Olching | 3,952.39 mi (6,360.76 km) |
| West Haven to Oldenburg | 3,686.08 mi (5,932.17 km) |
| West Haven to Oldenburg in Holstein | 3,755.97 mi (6,044.64 km) |
| West Haven to Olfen | 3,691.41 mi (5,940.75 km) |
| West Haven to Olpe | 3,728.22 mi (5,999.99 km) |
| West Haven to Olsberg | 3,744.84 mi (6,026.74 km) |
| West Haven to Oranienburg | 3,888.10 mi (6,257.29 km) |
| West Haven to Ortenberg | 3,795.66 mi (6,108.53 km) |
