| Hackettstown to Popovo | 4,830.18 mi (7,773.42 km) |
| Hackettstown to Provadia | 4,884.79 mi (7,861.31 km) |
| Hackettstown to Radnevo | 4,862.68 mi (7,825.74 km) |
| Hackettstown to Radomir | 4,730.95 mi (7,613.72 km) |
| Hackettstown to Rakitovo | 4,800.80 mi (7,726.15 km) |
| Hackettstown to Rakovski | 4,824.02 mi (7,763.52 km) |
| Hackettstown to Razgrad | 4,833.64 mi (7,779.00 km) |
| Hackettstown to Razlog | 4,779.62 mi (7,692.06 km) |
| Hackettstown to Ruse | 4,799.15 mi (7,723.48 km) |
| Hackettstown to Samokov | 4,764.51 mi (7,667.73 km) |
| Hackettstown to Sandanski | 4,785.05 mi (7,700.80 km) |
| Hackettstown to Sevlievo | 4,799.09 mi (7,723.38 km) |
| Hackettstown to Shumen | 4,860.76 mi (7,822.63 km) |
| Hackettstown to Silistra | 4,838.04 mi (7,786.08 km) |
| Hackettstown to Sliven | 4,862.46 mi (7,825.37 km) |
