| West Springfield to Oerlinghausen | 4,017.78 mi (6,465.99 km) |
| West Springfield to Oestrich-Winkel | 4,046.75 mi (6,512.62 km) |
| West Springfield to Offenburg | 4,088.51 mi (6,579.82 km) |
| West Springfield to Oftersheim | 4,088.71 mi (6,580.14 km) |
| West Springfield to Ohrdruf | 4,131.56 mi (6,649.10 km) |
| West Springfield to Ohringen | 4,131.02 mi (6,648.24 km) |
| West Springfield to Olbernhau | 4,238.28 mi (6,820.86 km) |
| West Springfield to Olching | 4,236.01 mi (6,817.19 km) |
| West Springfield to Oldenburg | 3,968.19 mi (6,386.19 km) |
| West Springfield to Oldenburg in Holstein | 4,036.82 mi (6,496.64 km) |
| West Springfield to Olfen | 3,974.36 mi (6,396.11 km) |
| West Springfield to Olpe | 4,011.39 mi (6,455.71 km) |
| West Springfield to Olsberg | 4,027.82 mi (6,482.15 km) |
| West Springfield to Oranienburg | 4,169.60 mi (6,710.32 km) |
| West Springfield to Ortenberg | 4,078.94 mi (6,564.42 km) |
