| Ironton to Orbetello | 4,670.12 mi (7,515.83 km) |
| Ironton to Oria | 5,020.05 mi (8,079.00 km) |
| Ironton to Oristano | 4,648.08 mi (7,480.36 km) |
| Ironton to Orta Nova | 4,905.06 mi (7,893.94 km) |
| Ironton to Orte | 4,719.68 mi (7,595.59 km) |
| Ironton to Ortona | 4,809.52 mi (7,740.18 km) |
| Ironton to Orvieto | 4,698.22 mi (7,561.05 km) |
| Ironton to Orzinuovi | 4,508.87 mi (7,256.33 km) |
| Ironton to Osimo | 4,727.51 mi (7,608.19 km) |
| Ironton to Ospitaletto | 4,509.24 mi (7,256.92 km) |
| Ironton to Ostuni | 5,008.41 mi (8,060.26 km) |
| Ironton to Ottaviano | 4,871.28 mi (7,839.57 km) |
| Ironton to Ovada | 4,481.31 mi (7,211.98 km) |
| Ironton to Ozieri | 4,641.64 mi (7,469.99 km) |
| Ironton to Paceco | 4,898.76 mi (7,883.80 km) |
