| Prospect Heights to Nasaud | 5,006.56 mi (8,057.28 km) |
| Prospect Heights to Navodari | 5,294.48 mi (8,520.64 km) |
| Prospect Heights to Negresti-Oas | 4,945.47 mi (7,958.97 km) |
| Prospect Heights to Nehoiu | 5,164.76 mi (8,311.88 km) |
| Prospect Heights to Ocna Mures | 5,030.75 mi (8,096.21 km) |
| Prospect Heights to Odobesti | 5,170.08 mi (8,320.44 km) |
| Prospect Heights to Odorheiu Secuiesc | 5,083.65 mi (8,181.34 km) |
| Prospect Heights to Oltenita | 5,238.74 mi (8,430.94 km) |
| Prospect Heights to Onesti | 5,135.79 mi (8,265.25 km) |
| Prospect Heights to Oradea | 4,931.56 mi (7,936.58 km) |
| Prospect Heights to Orastie | 5,033.69 mi (8,100.95 km) |
| Prospect Heights to Oravita | 5,018.55 mi (8,076.58 km) |
| Prospect Heights to Orsova | 5,058.83 mi (8,141.39 km) |
| Prospect Heights to Otelu Rosu | 5,019.71 mi (8,078.44 km) |
| Prospect Heights to Otopeni | 5,196.27 mi (8,362.58 km) |
