| Denton to Orbetello | 976.29 mi (1,571.19 km) |
| Denton to Oria | 1,283.22 mi (2,065.15 km) |
| Denton to Oristano | 1,062.18 mi (1,709.41 km) |
| Denton to Orta Nova | 1,175.56 mi (1,891.89 km) |
| Denton to Orte | 1,009.62 mi (1,624.83 km) |
| Denton to Ortona | 1,078.39 mi (1,735.51 km) |
| Denton to Orvieto | 986.95 mi (1,588.34 km) |
| Denton to Orzinuovi | 774.41 mi (1,246.29 km) |
| Denton to Osimo | 988.51 mi (1,590.85 km) |
| Denton to Ospitaletto | 770.58 mi (1,240.12 km) |
| Denton to Ostuni | 1,269.10 mi (2,042.41 km) |
| Denton to Ottaviano | 1,163.12 mi (1,871.87 km) |
| Denton to Ovada | 778.27 mi (1,252.50 km) |
| Denton to Ozieri | 1,029.23 mi (1,656.39 km) |
| Denton to Paceco | 1,276.31 mi (2,054.03 km) |
