| Hadim to Orbetello | 1,186.52 mi (1,909.53 km) |
| Hadim to Oria | 833.68 mi (1,341.68 km) |
| Hadim to Oristano | 1,303.05 mi (2,097.06 km) |
| Hadim to Orta Nova | 944.15 mi (1,519.46 km) |
| Hadim to Orte | 1,128.33 mi (1,815.87 km) |
| Hadim to Ortona | 1,026.79 mi (1,652.46 km) |
| Hadim to Orvieto | 1,146.04 mi (1,844.38 km) |
| Hadim to Orzinuovi | 1,301.25 mi (2,094.17 km) |
| Hadim to Osimo | 1,093.48 mi (1,759.79 km) |
| Hadim to Ospitaletto | 1,298.31 mi (2,089.43 km) |
| Hadim to Ostuni | 839.77 mi (1,351.47 km) |
| Hadim to Ottaviano | 1,000.63 mi (1,610.36 km) |
| Hadim to Ovada | 1,346.36 mi (2,166.75 km) |
| Hadim to Ozieri | 1,283.33 mi (2,065.32 km) |
| Hadim to Paceco | 1,091.49 mi (1,756.59 km) |
