| Diest to Navodari | 1,182.81 mi (1,903.55 km) |
| Diest to Negresti-Oas | 850.77 mi (1,369.19 km) |
| Diest to Nehoiu | 1,049.20 mi (1,688.52 km) |
| Diest to Ocna Mures | 911.67 mi (1,467.19 km) |
| Diest to Odobesti | 1,067.91 mi (1,718.64 km) |
| Diest to Odorheiu Secuiesc | 975.34 mi (1,569.66 km) |
| Diest to Oltenita | 1,108.52 mi (1,784.00 km) |
| Diest to Onesti | 1,039.78 mi (1,673.37 km) |
| Diest to Oradea | 808.47 mi (1,301.11 km) |
| Diest to Orastie | 901.68 mi (1,451.11 km) |
| Diest to Oravita | 868.91 mi (1,398.38 km) |
| Diest to Orsova | 909.92 mi (1,464.38 km) |
| Diest to Otelu Rosu | 878.20 mi (1,413.33 km) |
| Diest to Otopeni | 1,067.68 mi (1,718.27 km) |
| Diest to Ovidiu | 1,182.40 mi (1,902.88 km) |
