| Heerlerbaan to Navodari | 1,140.37 mi (1,835.24 km) |
| Heerlerbaan to Negresti-Oas | 808.32 mi (1,300.86 km) |
| Heerlerbaan to Nehoiu | 1,006.74 mi (1,620.19 km) |
| Heerlerbaan to Ocna Mures | 869.20 mi (1,398.85 km) |
| Heerlerbaan to Odobesti | 1,025.40 mi (1,650.22 km) |
| Heerlerbaan to Odorheiu Secuiesc | 932.83 mi (1,501.25 km) |
| Heerlerbaan to Oltenita | 1,066.30 mi (1,716.04 km) |
| Heerlerbaan to Onesti | 997.27 mi (1,604.95 km) |
| Heerlerbaan to Oradea | 766.00 mi (1,232.75 km) |
| Heerlerbaan to Orastie | 859.38 mi (1,383.03 km) |
| Heerlerbaan to Oravita | 827.26 mi (1,331.35 km) |
| Heerlerbaan to Orsova | 868.25 mi (1,397.32 km) |
| Heerlerbaan to Otelu Rosu | 836.15 mi (1,345.66 km) |
| Heerlerbaan to Otopeni | 1,025.40 mi (1,650.23 km) |
| Heerlerbaan to Ovidiu | 1,139.96 mi (1,834.59 km) |
