| Naugatuck to Popovo | 4,731.32 mi (7,614.32 km) |
| Naugatuck to Provadia | 4,786.13 mi (7,702.53 km) |
| Naugatuck to Radnevo | 4,763.38 mi (7,665.91 km) |
| Naugatuck to Radomir | 4,631.16 mi (7,453.12 km) |
| Naugatuck to Rakitovo | 4,701.03 mi (7,565.58 km) |
| Naugatuck to Rakovski | 4,724.52 mi (7,603.38 km) |
| Naugatuck to Razgrad | 4,734.91 mi (7,620.11 km) |
| Naugatuck to Razlog | 4,679.71 mi (7,531.26 km) |
| Naugatuck to Ruse | 4,700.41 mi (7,564.58 km) |
| Naugatuck to Samokov | 4,664.76 mi (7,507.20 km) |
| Naugatuck to Sandanski | 4,685.01 mi (7,539.79 km) |
| Naugatuck to Sevlievo | 4,699.87 mi (7,563.72 km) |
| Naugatuck to Shumen | 4,762.02 mi (7,663.73 km) |
| Naugatuck to Silistra | 4,739.71 mi (7,627.83 km) |
| Naugatuck to Sliven | 4,763.37 mi (7,665.90 km) |
