| Desborough to Popovo | 1,390.44 mi (2,237.70 km) |
| Desborough to Provadia | 1,445.96 mi (2,327.04 km) |
| Desborough to Radnevo | 1,422.57 mi (2,289.41 km) |
| Desborough to Radomir | 1,293.98 mi (2,082.46 km) |
| Desborough to Rakitovo | 1,363.50 mi (2,194.33 km) |
| Desborough to Rakovski | 1,384.64 mi (2,228.36 km) |
| Desborough to Razgrad | 1,394.48 mi (2,244.20 km) |
| Desborough to Razlog | 1,344.04 mi (2,163.02 km) |
| Desborough to Ruse | 1,359.96 mi (2,188.64 km) |
| Desborough to Samokov | 1,327.06 mi (2,135.70 km) |
| Desborough to Sandanski | 1,351.37 mi (2,174.83 km) |
| Desborough to Sevlievo | 1,358.83 mi (2,186.83 km) |
| Desborough to Shumen | 1,421.55 mi (2,287.77 km) |
| Desborough to Silistra | 1,401.75 mi (2,255.90 km) |
| Desborough to Sliven | 1,422.20 mi (2,288.82 km) |
