| Rosemont to Orbetello | 6,099.29 mi (9,815.86 km) |
| Rosemont to Oria | 6,392.79 mi (10,288.19 km) |
| Rosemont to Oristano | 6,160.71 mi (9,914.71 km) |
| Rosemont to Orta Nova | 6,291.36 mi (10,124.97 km) |
| Rosemont to Orte | 6,132.25 mi (9,868.90 km) |
| Rosemont to Ortona | 6,195.66 mi (9,970.95 km) |
| Rosemont to Orvieto | 6,109.61 mi (9,832.47 km) |
| Rosemont to Orzinuovi | 5,895.97 mi (9,488.65 km) |
| Rosemont to Osimo | 6,104.75 mi (9,824.65 km) |
| Rosemont to Ospitaletto | 5,891.30 mi (9,481.12 km) |
| Rosemont to Ostuni | 6,377.61 mi (10,263.77 km) |
| Rosemont to Ottaviano | 6,284.72 mi (10,114.28 km) |
| Rosemont to Ovada | 5,900.79 mi (9,496.40 km) |
| Rosemont to Ozieri | 6,136.08 mi (9,875.07 km) |
| Rosemont to Paceco | 6,392.48 mi (10,287.71 km) |
