| Irondale to Orbetello | 5,059.29 mi (8,142.15 km) |
| Irondale to Oria | 5,411.60 mi (8,709.12 km) |
| Irondale to Oristano | 5,028.92 mi (8,093.27 km) |
| Irondale to Orta Nova | 5,296.28 mi (8,523.54 km) |
| Irondale to Orte | 5,109.98 mi (8,223.71 km) |
| Irondale to Ortona | 5,201.42 mi (8,370.88 km) |
| Irondale to Orvieto | 5,088.77 mi (8,189.59 km) |
| Irondale to Orzinuovi | 4,902.78 mi (7,890.27 km) |
| Irondale to Osimo | 5,120.70 mi (8,240.97 km) |
| Irondale to Ospitaletto | 4,903.54 mi (7,891.49 km) |
| Irondale to Ostuni | 5,400.32 mi (8,690.98 km) |
| Irondale to Ottaviano | 5,260.39 mi (8,465.78 km) |
| Irondale to Ovada | 4,872.75 mi (7,841.93 km) |
| Irondale to Ozieri | 5,024.55 mi (8,086.22 km) |
| Irondale to Paceco | 5,279.62 mi (8,496.73 km) |
