| Cuellar to Popovo | 1,556.25 mi (2,504.54 km) |
| Cuellar to Provadia | 1,617.51 mi (2,603.13 km) |
| Cuellar to Radnevo | 1,549.74 mi (2,494.07 km) |
| Cuellar to Radomir | 1,396.63 mi (2,247.65 km) |
| Cuellar to Rakitovo | 1,458.93 mi (2,347.92 km) |
| Cuellar to Rakovski | 1,500.85 mi (2,415.38 km) |
| Cuellar to Razgrad | 1,569.20 mi (2,525.38 km) |
| Cuellar to Razlog | 1,428.51 mi (2,298.96 km) |
| Cuellar to Ruse | 1,539.49 mi (2,477.57 km) |
| Cuellar to Samokov | 1,428.95 mi (2,299.68 km) |
| Cuellar to Sandanski | 1,422.28 mi (2,288.95 km) |
| Cuellar to Sevlievo | 1,502.34 mi (2,417.79 km) |
| Cuellar to Shumen | 1,591.73 mi (2,561.64 km) |
| Cuellar to Silistra | 1,602.75 mi (2,579.37 km) |
| Cuellar to Sliven | 1,566.43 mi (2,520.93 km) |
