| Buckley to Popovo | 1,495.30 mi (2,406.45 km) |
| Buckley to Provadia | 1,550.36 mi (2,495.06 km) |
| Buckley to Radnevo | 1,528.40 mi (2,459.72 km) |
| Buckley to Radomir | 1,400.73 mi (2,254.26 km) |
| Buckley to Rakitovo | 1,470.18 mi (2,366.02 km) |
| Buckley to Rakovski | 1,490.86 mi (2,399.30 km) |
| Buckley to Razgrad | 1,499.02 mi (2,412.44 km) |
| Buckley to Razlog | 1,450.94 mi (2,335.06 km) |
| Buckley to Ruse | 1,464.51 mi (2,356.90 km) |
| Buckley to Samokov | 1,433.73 mi (2,307.37 km) |
| Buckley to Sandanski | 1,458.43 mi (2,347.12 km) |
| Buckley to Sevlievo | 1,464.49 mi (2,356.86 km) |
| Buckley to Shumen | 1,526.12 mi (2,456.05 km) |
| Buckley to Silistra | 1,505.27 mi (2,422.49 km) |
| Buckley to Sliven | 1,527.58 mi (2,458.40 km) |
