| Boxley to Popovo | 1,313.70 mi (2,114.19 km) |
| Boxley to Provadia | 1,370.35 mi (2,205.37 km) |
| Boxley to Radnevo | 1,342.88 mi (2,161.16 km) |
| Boxley to Radomir | 1,210.93 mi (1,948.80 km) |
| Boxley to Rakitovo | 1,280.70 mi (2,061.09 km) |
| Boxley to Rakovski | 1,303.67 mi (2,098.05 km) |
| Boxley to Razgrad | 1,318.59 mi (2,122.07 km) |
| Boxley to Razlog | 1,260.23 mi (2,028.14 km) |
| Boxley to Ruse | 1,284.10 mi (2,066.56 km) |
| Boxley to Samokov | 1,244.34 mi (2,002.58 km) |
| Boxley to Sandanski | 1,266.69 mi (2,038.54 km) |
| Boxley to Sevlievo | 1,279.79 mi (2,059.63 km) |
| Boxley to Shumen | 1,345.55 mi (2,165.46 km) |
| Boxley to Silistra | 1,328.42 mi (2,137.88 km) |
| Boxley to Sliven | 1,343.93 mi (2,162.85 km) |
