| Heek to Navodari | 1,121.33 mi (1,804.61 km) |
| Heek to Negresti-Oas | 780.10 mi (1,255.45 km) |
| Heek to Nehoiu | 987.89 mi (1,589.85 km) |
| Heek to Ocna Mures | 850.38 mi (1,368.55 km) |
| Heek to Odobesti | 1,002.35 mi (1,613.13 km) |
| Heek to Odorheiu Secuiesc | 910.75 mi (1,465.71 km) |
| Heek to Oltenita | 1,053.47 mi (1,695.39 km) |
| Heek to Onesti | 972.06 mi (1,564.38 km) |
| Heek to Oradea | 747.80 mi (1,203.47 km) |
| Heek to Orastie | 846.07 mi (1,361.61 km) |
| Heek to Oravita | 824.31 mi (1,326.60 km) |
| Heek to Orsova | 864.78 mi (1,391.74 km) |
| Heek to Otelu Rosu | 827.74 mi (1,332.12 km) |
| Heek to Otopeni | 1,011.65 mi (1,628.09 km) |
| Heek to Ovidiu | 1,121.30 mi (1,804.57 km) |
