| Collinsville to Orbetello | 4,972.22 mi (8,002.01 km) |
| Collinsville to Oria | 5,316.04 mi (8,555.34 km) |
| Collinsville to Oristano | 4,964.88 mi (7,990.20 km) |
| Collinsville to Orta Nova | 5,202.14 mi (8,372.04 km) |
| Collinsville to Orte | 5,019.35 mi (8,077.86 km) |
| Collinsville to Ortona | 5,105.46 mi (8,216.45 km) |
| Collinsville to Orvieto | 4,997.43 mi (8,042.58 km) |
| Collinsville to Orzinuovi | 4,801.39 mi (7,727.09 km) |
| Collinsville to Osimo | 5,020.88 mi (8,080.32 km) |
| Collinsville to Ospitaletto | 4,800.83 mi (7,726.18 km) |
| Collinsville to Ostuni | 5,303.64 mi (8,535.38 km) |
| Collinsville to Ottaviano | 5,172.81 mi (8,324.83 km) |
| Collinsville to Ovada | 4,779.47 mi (7,691.81 km) |
| Collinsville to Ozieri | 4,955.14 mi (7,974.52 km) |
| Collinsville to Paceco | 5,214.70 mi (8,392.25 km) |
