| Utrecht to Navodari | 1,200.33 mi (1,931.74 km) |
| Utrecht to Negresti-Oas | 861.19 mi (1,385.95 km) |
| Utrecht to Nehoiu | 1,066.72 mi (1,716.71 km) |
| Utrecht to Ocna Mures | 929.04 mi (1,495.14 km) |
| Utrecht to Odobesti | 1,082.38 mi (1,741.92 km) |
| Utrecht to Odorheiu Secuiesc | 990.43 mi (1,593.94 km) |
| Utrecht to Oltenita | 1,130.43 mi (1,819.25 km) |
| Utrecht to Onesti | 1,052.62 mi (1,694.03 km) |
| Utrecht to Oradea | 826.11 mi (1,329.50 km) |
| Utrecht to Orastie | 922.94 mi (1,485.33 km) |
| Utrecht to Oravita | 897.24 mi (1,443.98 km) |
| Utrecht to Orsova | 938.00 mi (1,509.56 km) |
| Utrecht to Otelu Rosu | 902.83 mi (1,452.97 km) |
| Utrecht to Otopeni | 1,088.88 mi (1,752.39 km) |
| Utrecht to Ovidiu | 1,200.19 mi (1,931.52 km) |
