| Boadilla del Monte to Popovo | 1,553.63 mi (2,500.33 km) |
| Boadilla del Monte to Provadia | 1,614.58 mi (2,598.42 km) |
| Boadilla del Monte to Radnevo | 1,543.60 mi (2,484.18 km) |
| Boadilla del Monte to Radomir | 1,390.61 mi (2,237.96 km) |
| Boadilla del Monte to Rakitovo | 1,451.18 mi (2,335.45 km) |
| Boadilla del Monte to Rakovski | 1,494.40 mi (2,405.00 km) |
| Boadilla del Monte to Razgrad | 1,567.23 mi (2,522.21 km) |
| Boadilla del Monte to Razlog | 1,420.23 mi (2,285.63 km) |
| Boadilla del Monte to Ruse | 1,538.39 mi (2,475.81 km) |
| Boadilla del Monte to Samokov | 1,422.30 mi (2,288.98 km) |
| Boadilla del Monte to Sandanski | 1,412.83 mi (2,273.72 km) |
| Boadilla del Monte to Sevlievo | 1,498.43 mi (2,411.49 km) |
| Boadilla del Monte to Shumen | 1,589.02 mi (2,557.28 km) |
| Boadilla del Monte to Silistra | 1,602.77 mi (2,579.41 km) |
| Boadilla del Monte to Sliven | 1,561.65 mi (2,513.23 km) |
