| Colton to Orbetello | 6,230.55 mi (10,027.10 km) |
| Colton to Oria | 6,541.35 mi (10,527.28 km) |
| Colton to Oristano | 6,272.19 mi (10,094.11 km) |
| Colton to Orta Nova | 6,435.37 mi (10,356.73 km) |
| Colton to Orte | 6,267.90 mi (10,087.21 km) |
| Colton to Ortona | 6,338.36 mi (10,200.61 km) |
| Colton to Orvieto | 6,245.23 mi (10,050.72 km) |
| Colton to Orzinuovi | 6,034.18 mi (9,711.07 km) |
| Colton to Osimo | 6,248.21 mi (10,055.53 km) |
| Colton to Ospitaletto | 6,030.59 mi (9,705.29 km) |
| Colton to Ostuni | 6,526.77 mi (10,503.82 km) |
| Colton to Ottaviano | 6,422.28 mi (10,335.66 km) |
| Colton to Ovada | 6,031.56 mi (9,706.86 km) |
| Colton to Ozieri | 6,251.85 mi (10,061.39 km) |
| Colton to Paceco | 6,511.79 mi (10,479.71 km) |
