| Trotwood to Orbetello | 4,687.05 mi (7,543.08 km) |
| Trotwood to Oria | 5,034.26 mi (8,101.86 km) |
| Trotwood to Oristano | 4,672.38 mi (7,519.46 km) |
| Trotwood to Orta Nova | 4,919.72 mi (7,917.53 km) |
| Trotwood to Orte | 4,735.46 mi (7,620.99 km) |
| Trotwood to Ortona | 4,823.58 mi (7,762.81 km) |
| Trotwood to Orvieto | 4,713.77 mi (7,586.08 km) |
| Trotwood to Orzinuovi | 4,521.13 mi (7,276.05 km) |
| Trotwood to Osimo | 4,740.30 mi (7,628.78 km) |
| Trotwood to Ospitaletto | 4,521.06 mi (7,275.94 km) |
| Trotwood to Ostuni | 5,022.25 mi (8,082.54 km) |
| Trotwood to Ottaviano | 4,888.05 mi (7,866.56 km) |
| Trotwood to Ovada | 4,496.22 mi (7,235.97 km) |
| Trotwood to Ozieri | 4,664.23 mi (7,506.35 km) |
| Trotwood to Paceco | 4,922.74 mi (7,922.38 km) |
