| Vermillion to Orbetello | 5,054.83 mi (8,134.96 km) |
| Vermillion to Oria | 5,384.30 mi (8,665.20 km) |
| Vermillion to Oristano | 5,073.87 mi (8,165.60 km) |
| Vermillion to Orta Nova | 5,273.52 mi (8,486.91 km) |
| Vermillion to Orte | 5,097.21 mi (8,203.17 km) |
| Vermillion to Ortona | 5,175.98 mi (8,329.94 km) |
| Vermillion to Orvieto | 5,074.75 mi (8,167.03 km) |
| Vermillion to Orzinuovi | 4,869.64 mi (7,836.93 km) |
| Vermillion to Osimo | 5,087.99 mi (8,188.33 km) |
| Vermillion to Ospitaletto | 4,867.54 mi (7,833.55 km) |
| Vermillion to Ostuni | 5,370.74 mi (8,643.37 km) |
| Vermillion to Ottaviano | 5,252.20 mi (8,452.59 km) |
| Vermillion to Ovada | 4,857.50 mi (7,817.40 km) |
| Vermillion to Ozieri | 5,058.19 mi (8,140.38 km) |
| Vermillion to Paceco | 5,319.47 mi (8,560.86 km) |
