| Hercules to Nasaud | 6,195.30 mi (9,970.36 km) |
| Hercules to Navodari | 6,464.82 mi (10,404.13 km) |
| Hercules to Negresti-Oas | 6,138.82 mi (9,879.47 km) |
| Hercules to Nehoiu | 6,354.42 mi (10,226.45 km) |
| Hercules to Ocna Mures | 6,239.57 mi (10,041.61 km) |
| Hercules to Odobesti | 6,343.30 mi (10,208.56 km) |
| Hercules to Odorheiu Secuiesc | 6,273.95 mi (10,096.94 km) |
| Hercules to Oltenita | 6,440.92 mi (10,365.66 km) |
| Hercules to Onesti | 6,306.45 mi (10,149.24 km) |
| Hercules to Oradea | 6,156.14 mi (9,907.35 km) |
| Hercules to Orastie | 6,259.01 mi (10,072.90 km) |
| Hercules to Oravita | 6,275.38 mi (10,099.25 km) |
| Hercules to Orsova | 6,310.71 mi (10,156.11 km) |
| Hercules to Otelu Rosu | 6,260.97 mi (10,076.06 km) |
| Hercules to Otopeni | 6,400.22 mi (10,300.16 km) |
