| Heerhugowaard to Navodari | 1,224.08 mi (1,969.97 km) |
| Heerhugowaard to Negresti-Oas | 882.26 mi (1,419.86 km) |
| Heerhugowaard to Nehoiu | 1,090.67 mi (1,755.26 km) |
| Heerhugowaard to Ocna Mures | 953.18 mi (1,534.00 km) |
| Heerhugowaard to Odobesti | 1,104.89 mi (1,778.15 km) |
| Heerhugowaard to Odorheiu Secuiesc | 1,013.39 mi (1,630.90 km) |
| Heerhugowaard to Oltenita | 1,156.27 mi (1,860.84 km) |
| Heerhugowaard to Onesti | 1,074.42 mi (1,729.11 km) |
| Heerhugowaard to Oradea | 850.63 mi (1,368.96 km) |
| Heerhugowaard to Orastie | 948.85 mi (1,527.03 km) |
| Heerhugowaard to Oravita | 926.25 mi (1,490.66 km) |
| Heerhugowaard to Orsova | 966.82 mi (1,555.95 km) |
| Heerhugowaard to Otelu Rosu | 930.25 mi (1,497.10 km) |
| Heerhugowaard to Otopeni | 1,114.47 mi (1,793.57 km) |
| Heerhugowaard to Ovidiu | 1,224.07 mi (1,969.95 km) |
