| Gadsden to Orbetello | 5,010.28 mi (8,063.27 km) |
| Gadsden to Oria | 5,362.58 mi (8,630.24 km) |
| Gadsden to Oristano | 4,980.04 mi (8,014.60 km) |
| Gadsden to Orta Nova | 5,247.27 mi (8,444.66 km) |
| Gadsden to Orte | 5,060.96 mi (8,144.83 km) |
| Gadsden to Ortona | 5,152.41 mi (8,292.00 km) |
| Gadsden to Orvieto | 5,039.76 mi (8,110.70 km) |
| Gadsden to Orzinuovi | 4,853.78 mi (7,811.40 km) |
| Gadsden to Osimo | 5,071.69 mi (8,162.10 km) |
| Gadsden to Ospitaletto | 4,854.54 mi (7,812.63 km) |
| Gadsden to Ostuni | 5,351.31 mi (8,612.10 km) |
| Gadsden to Ottaviano | 5,211.38 mi (8,386.91 km) |
| Gadsden to Ovada | 4,823.73 mi (7,763.04 km) |
| Gadsden to Ozieri | 4,975.62 mi (8,007.48 km) |
| Gadsden to Paceco | 5,230.74 mi (8,418.07 km) |
