| Conroe to Orbetello | 5,591.48 mi (8,998.62 km) |
| Conroe to Oria | 5,940.21 mi (9,559.85 km) |
| Conroe to Oristano | 5,570.71 mi (8,965.19 km) |
| Conroe to Orta Nova | 5,825.44 mi (9,375.14 km) |
| Conroe to Orte | 5,640.57 mi (9,077.63 km) |
| Conroe to Ortona | 5,729.57 mi (9,220.86 km) |
| Conroe to Orvieto | 5,619.00 mi (9,042.91 km) |
| Conroe to Orzinuovi | 5,427.81 mi (8,735.21 km) |
| Conroe to Osimo | 5,646.82 mi (9,087.67 km) |
| Conroe to Ospitaletto | 5,427.89 mi (8,735.35 km) |
| Conroe to Ostuni | 5,928.37 mi (9,540.79 km) |
| Conroe to Ottaviano | 5,792.61 mi (9,322.30 km) |
| Conroe to Ovada | 5,401.76 mi (8,693.29 km) |
| Conroe to Ozieri | 5,564.25 mi (8,954.79 km) |
| Conroe to Paceco | 5,821.40 mi (9,368.63 km) |
