| Buckingham to Popovo | 1,389.21 mi (2,235.72 km) |
| Buckingham to Provadia | 1,445.31 mi (2,326.00 km) |
| Buckingham to Radnevo | 1,419.80 mi (2,284.95 km) |
| Buckingham to Radomir | 1,289.28 mi (2,074.90 km) |
| Buckingham to Rakitovo | 1,358.97 mi (2,187.04 km) |
| Buckingham to Rakovski | 1,381.16 mi (2,222.76 km) |
| Buckingham to Razgrad | 1,393.68 mi (2,242.91 km) |
| Buckingham to Razlog | 1,338.90 mi (2,154.76 km) |
| Buckingham to Ruse | 1,359.17 mi (2,187.37 km) |
| Buckingham to Samokov | 1,322.57 mi (2,128.47 km) |
| Buckingham to Sandanski | 1,345.70 mi (2,165.70 km) |
| Buckingham to Sevlievo | 1,356.40 mi (2,182.91 km) |
| Buckingham to Shumen | 1,420.70 mi (2,286.40 km) |
| Buckingham to Silistra | 1,402.20 mi (2,256.62 km) |
| Buckingham to Sliven | 1,420.19 mi (2,285.58 km) |
