| Hackettstown to Oak Harbor (Washington) | 2,368.23 mi (3,811.30 km) |
| Hackettstown to Oak Hills (Oregon) | 2,403.65 mi (3,868.30 km) |
| Hackettstown to Oak Lawn (Illinois) | 673.16 mi (1,083.35 km) |
| Hackettstown to Oak Park (California) | 2,425.72 mi (3,903.81 km) |
| Hackettstown to Oak Park (Illinois) | 675.33 mi (1,086.84 km) |
| Hackettstown to Oak Park (Michigan) | 445.29 mi (716.63 km) |
| Hackettstown to Oak Ridge (Florida) | 933.14 mi (1,501.74 km) |
| Hackettstown to Oak Ridge (New Jersey) | 21.12 mi (33.98 km) |
| Hackettstown to Oak Ridge (Tennessee) | 613.38 mi (987.15 km) |
| Hackettstown to Oakdale (California) | 2,441.29 mi (3,928.88 km) |
| Hackettstown to Oakdale (Minnesota) | 958.77 mi (1,542.99 km) |
| Hackettstown to Oakland (California) | 2,510.96 mi (4,041.00 km) |
| Hackettstown to Oakland (New Jersey) | 32.89 mi (52.94 km) |
| Hackettstown to Oakland Park (Florida) | 1,058.86 mi (1,704.06 km) |
| Hackettstown to Oakleaf Plantation (Florida) | 836.17 mi (1,345.69 km) |
