| Grootegast to Navodari | 1,180.77 mi (1,900.27 km) |
| Grootegast to Negresti-Oas | 835.59 mi (1,344.75 km) |
| Grootegast to Nehoiu | 1,047.97 mi (1,686.54 km) |
| Grootegast to Ocna Mures | 911.18 mi (1,466.40 km) |
| Grootegast to Odobesti | 1,059.82 mi (1,705.62 km) |
| Grootegast to Odorheiu Secuiesc | 969.27 mi (1,559.90 km) |
| Grootegast to Oltenita | 1,116.70 mi (1,797.16 km) |
| Grootegast to Onesti | 1,028.31 mi (1,654.91 km) |
| Grootegast to Oradea | 809.63 mi (1,302.97 km) |
| Grootegast to Orastie | 909.96 mi (1,464.44 km) |
| Grootegast to Oravita | 893.46 mi (1,437.89 km) |
| Grootegast to Orsova | 933.51 mi (1,502.34 km) |
| Grootegast to Otelu Rosu | 894.26 mi (1,439.18 km) |
| Grootegast to Otopeni | 1,074.54 mi (1,729.30 km) |
| Grootegast to Ovidiu | 1,180.97 mi (1,900.59 km) |
