| Smyrna to Orbetello | 4,950.47 mi (7,967.00 km) |
| Smyrna to Oria | 5,303.79 mi (8,535.62 km) |
| Smyrna to Oristano | 4,916.68 mi (7,912.63 km) |
| Smyrna to Orta Nova | 5,188.36 mi (8,349.86 km) |
| Smyrna to Orte | 5,001.66 mi (8,049.40 km) |
| Smyrna to Ortona | 5,093.89 mi (8,197.83 km) |
| Smyrna to Orvieto | 4,980.60 mi (8,015.50 km) |
| Smyrna to Orzinuovi | 4,796.47 mi (7,719.18 km) |
| Smyrna to Osimo | 5,013.89 mi (8,069.08 km) |
| Smyrna to Ospitaletto | 4,797.46 mi (7,720.76 km) |
| Smyrna to Ostuni | 5,292.71 mi (8,517.80 km) |
| Smyrna to Ottaviano | 5,151.45 mi (8,290.45 km) |
| Smyrna to Ovada | 4,765.11 mi (7,668.70 km) |
| Smyrna to Ozieri | 4,913.07 mi (7,906.82 km) |
| Smyrna to Paceco | 5,167.28 mi (8,315.94 km) |
