| Harran to Orbetello | 1,521.16 mi (2,448.07 km) |
| Harran to Oria | 1,177.53 mi (1,895.06 km) |
| Harran to Oristano | 1,653.37 mi (2,660.85 km) |
| Harran to Orta Nova | 1,283.20 mi (2,065.10 km) |
| Harran to Orte | 1,461.79 mi (2,352.52 km) |
| Harran to Ortona | 1,358.90 mi (2,186.93 km) |
| Harran to Orvieto | 1,477.77 mi (2,378.24 km) |
| Harran to Orzinuovi | 1,613.58 mi (2,596.80 km) |
| Harran to Osimo | 1,416.99 mi (2,280.43 km) |
| Harran to Ospitaletto | 1,609.04 mi (2,589.51 km) |
| Harran to Ostuni | 1,181.76 mi (1,901.85 km) |
| Harran to Ottaviano | 1,344.30 mi (2,163.44 km) |
| Harran to Ovada | 1,666.75 mi (2,682.38 km) |
| Harran to Ozieri | 1,630.34 mi (2,623.79 km) |
| Harran to Paceco | 1,449.80 mi (2,333.22 km) |
