| Hackettstown to Noventa Vicentina | 4,151.90 mi (6,681.84 km) |
| Hackettstown to Novi di Modena | 4,138.24 mi (6,659.86 km) |
| Hackettstown to Novi Ligure | 4,051.89 mi (6,520.89 km) |
| Hackettstown to Nuoro | 4,227.74 mi (6,803.89 km) |
| Hackettstown to Occhiobello | 4,166.26 mi (6,704.94 km) |
| Hackettstown to Oderzo | 4,175.33 mi (6,719.55 km) |
| Hackettstown to Oggiono | 4,042.65 mi (6,506.01 km) |
| Hackettstown to Olbia | 4,214.08 mi (6,781.90 km) |
| Hackettstown to Oleggio | 4,018.02 mi (6,466.37 km) |
| Hackettstown to Olgiate Comasco | 4,026.33 mi (6,479.76 km) |
| Hackettstown to Olgiate Olona | 4,027.63 mi (6,481.84 km) |
| Hackettstown to Omegna | 3,999.43 mi (6,436.46 km) |
| Hackettstown to Opera | 4,050.00 mi (6,517.84 km) |
| Hackettstown to Oppeano | 4,136.51 mi (6,657.07 km) |
| Hackettstown to Orbassano | 3,989.86 mi (6,421.06 km) |
