| Cities | Distance |
|---|---|
| Diest to Oria | 942.24 mi (1,516.39 km) |
| Diest to Oristano | 784.24 mi (1,262.11 km) |
| Diest to Orta Nova | 837.96 mi (1,348.57 km) |
| Diest to Orte | 683.03 mi (1,099.23 km) |
| Diest to Ortona | 741.99 mi (1,194.12 km) |
| Diest to Orvieto | 660.71 mi (1,063.32 km) |
| Diest to Orzinuovi | 446.37 mi (718.36 km) |
| Diest to Osimo | 651.12 mi (1,047.87 km) |
| Diest to Ospitaletto | 440.29 mi (708.58 km) |
| Diest to Ostuni | 927.63 mi (1,492.88 km) |
| Diest to Ottaviano | 832.55 mi (1,339.86 km) |
| Diest to Ovada | 468.95 mi (754.70 km) |
| Diest to Ozieri | 743.07 mi (1,195.86 km) |
| Diest to Paceco | 970.16 mi (1,561.32 km) |
| Diest to Pachino | 1,103.32 mi (1,775.63 km) |