| Calverton to Oerlinghausen | 3,993.58 mi (6,427.05 km) |
| Calverton to Oestrich-Winkel | 4,022.73 mi (6,473.96 km) |
| Calverton to Offenburg | 4,064.63 mi (6,541.39 km) |
| Calverton to Oftersheim | 4,064.72 mi (6,541.54 km) |
| Calverton to Ohrdruf | 4,107.40 mi (6,610.23 km) |
| Calverton to Ohringen | 4,107.03 mi (6,609.63 km) |
| Calverton to Olbernhau | 4,214.08 mi (6,781.91 km) |
| Calverton to Olching | 4,212.05 mi (6,778.64 km) |
| Calverton to Oldenburg | 3,943.93 mi (6,347.14 km) |
| Calverton to Oldenburg in Holstein | 4,012.46 mi (6,457.43 km) |
| Calverton to Olfen | 3,950.21 mi (6,357.24 km) |
| Calverton to Olpe | 3,987.28 mi (6,416.91 km) |
| Calverton to Olsberg | 4,003.67 mi (6,443.29 km) |
| Calverton to Oranienburg | 4,145.28 mi (6,671.18 km) |
| Calverton to Ortenberg | 4,054.86 mi (6,525.66 km) |
