| Hackettstown to Morristown (New Jersey) | 18.65 mi (30.01 km) |
| Hackettstown to Morristown (Tennessee) | 559.05 mi (899.70 km) |
| Hackettstown to Morrisville (North Carolina) | 408.99 mi (658.20 km) |
| Hackettstown to Morro Bay (California) | 2,501.49 mi (4,025.75 km) |
| Hackettstown to Morton (Illinois) | 765.83 mi (1,232.49 km) |
| Hackettstown to Morton Grove (Illinois) | 675.70 mi (1,087.43 km) |
| Hackettstown to Moscow (Idaho) | 2,115.89 mi (3,405.20 km) |
| Hackettstown to Moses Lake (Washington) | 2,220.60 mi (3,573.70 km) |
| Hackettstown to Moss Bluff (Louisiana) | 1,259.88 mi (2,027.58 km) |
| Hackettstown to Moss Point (Mississippi) | 1,051.79 mi (1,692.70 km) |
| Hackettstown to Moultrie (Georgia) | 834.84 mi (1,343.54 km) |
| Hackettstown to Mounds View (Minnesota) | 972.01 mi (1,564.31 km) |
| Hackettstown to Mount Airy (North Carolina) | 433.02 mi (696.88 km) |
| Hackettstown to Mount Clemens (Michigan) | 432.36 mi (695.82 km) |
| Hackettstown to Mount Dora (Florida) | 916.35 mi (1,474.73 km) |
