| Trotwood to Oerlinghausen | 4,238.83 mi (6,821.73 km) |
| Trotwood to Oestrich-Winkel | 4,280.01 mi (6,888.01 km) |
| Trotwood to Offenburg | 4,330.17 mi (6,968.74 km) |
| Trotwood to Oftersheim | 4,324.33 mi (6,959.34 km) |
| Trotwood to Ohrdruf | 4,355.26 mi (7,009.11 km) |
| Trotwood to Ohringen | 4,365.86 mi (7,026.17 km) |
| Trotwood to Olbernhau | 4,457.88 mi (7,174.27 km) |
| Trotwood to Olching | 4,472.60 mi (7,197.95 km) |
| Trotwood to Oldenburg | 4,183.19 mi (6,732.20 km) |
| Trotwood to Oldenburg in Holstein | 4,240.46 mi (6,824.36 km) |
| Trotwood to Olfen | 4,199.06 mi (6,757.73 km) |
| Trotwood to Olpe | 4,239.29 mi (6,822.47 km) |
| Trotwood to Olsberg | 4,252.69 mi (6,844.05 km) |
| Trotwood to Oranienburg | 4,377.90 mi (7,045.55 km) |
| Trotwood to Ortenberg | 4,308.33 mi (6,933.58 km) |
