| Hackettstown to Nasaud | 4,596.73 mi (7,397.72 km) |
| Hackettstown to Navodari | 4,881.76 mi (7,856.43 km) |
| Hackettstown to Negresti-Oas | 4,535.97 mi (7,299.94 km) |
| Hackettstown to Nehoiu | 4,748.74 mi (7,642.36 km) |
| Hackettstown to Ocna Mures | 4,611.56 mi (7,421.59 km) |
| Hackettstown to Odobesti | 4,760.69 mi (7,661.60 km) |
| Hackettstown to Odorheiu Secuiesc | 4,670.31 mi (7,516.14 km) |
| Hackettstown to Oltenita | 4,814.92 mi (7,748.87 km) |
| Hackettstown to Onesti | 4,728.73 mi (7,610.15 km) |
| Hackettstown to Oradea | 4,509.28 mi (7,256.98 km) |
| Hackettstown to Orastie | 4,607.44 mi (7,414.96 km) |
| Hackettstown to Oravita | 4,579.52 mi (7,370.03 km) |
| Hackettstown to Orsova | 4,620.51 mi (7,435.99 km) |
| Hackettstown to Otelu Rosu | 4,587.21 mi (7,382.41 km) |
| Hackettstown to Otopeni | 4,773.20 mi (7,681.73 km) |
