| Hackettstown to Red Bank (New Jersey) | 52.97 mi (85.24 km) |
| Hackettstown to Red Bank (Tennessee) | 693.86 mi (1,116.66 km) |
| Hackettstown to Red Bluff (California) | 2,459.96 mi (3,958.92 km) |
| Hackettstown to Red Hill (South Carolina) | 540.14 mi (869.27 km) |
| Hackettstown to Red Oak (Texas) | 1,341.09 mi (2,158.27 km) |
| Hackettstown to Red Wing (Minnesota) | 936.34 mi (1,506.89 km) |
| Hackettstown to Redan (Georgia) | 709.91 mi (1,142.49 km) |
| Hackettstown to Redding (California) | 2,458.33 mi (3,956.30 km) |
| Hackettstown to Redland (Maryland) | 170.91 mi (275.05 km) |
| Hackettstown to Redlands (California) | 2,346.22 mi (3,775.87 km) |
| Hackettstown to Redmond (Oregon) | 2,339.46 mi (3,764.99 km) |
| Hackettstown to Redmond (Washington) | 2,348.95 mi (3,780.27 km) |
| Hackettstown to Redondo Beach (California) | 2,414.66 mi (3,886.02 km) |
| Hackettstown to Redwood City (California) | 2,518.29 mi (4,052.79 km) |
| Hackettstown to Reedley (California) | 2,397.05 mi (3,857.68 km) |
