| Hackettstown to Nyon | 3,890.80 mi (6,261.64 km) |
| Hackettstown to Oberriet | 4,002.51 mi (6,441.42 km) |
| Hackettstown to Obersiggenthal | 3,944.05 mi (6,347.33 km) |
| Hackettstown to Oberwil | 3,912.38 mi (6,296.37 km) |
| Hackettstown to Oberwingert | 3,963.01 mi (6,377.84 km) |
| Hackettstown to Oftringen | 3,933.58 mi (6,330.49 km) |
| Hackettstown to Olten | 3,931.86 mi (6,327.71 km) |
| Hackettstown to Onex | 3,891.17 mi (6,262.24 km) |
| Hackettstown to Opfikon | 3,957.17 mi (6,368.46 km) |
| Hackettstown to Ostermundigen | 3,926.73 mi (6,319.45 km) |
| Hackettstown to Payerne | 3,907.43 mi (6,288.39 km) |
| Hackettstown to Pfaffikon | 3,968.29 mi (6,386.35 km) |
| Hackettstown to Plan-les-Ouates | 3,892.39 mi (6,264.20 km) |
| Hackettstown to Pratteln | 3,918.37 mi (6,306.01 km) |
| Hackettstown to Prilly | 3,901.90 mi (6,279.50 km) |
