| Towcester to Popovo | 1,391.76 mi (2,239.82 km) |
| Towcester to Provadia | 1,447.69 mi (2,329.84 km) |
| Towcester to Radnevo | 1,422.79 mi (2,289.76 km) |
| Towcester to Radomir | 1,292.80 mi (2,080.56 km) |
| Towcester to Rakitovo | 1,362.44 mi (2,192.63 km) |
| Towcester to Rakovski | 1,384.34 mi (2,227.88 km) |
| Towcester to Razgrad | 1,396.11 mi (2,246.82 km) |
| Towcester to Razlog | 1,342.54 mi (2,160.61 km) |
| Towcester to Ruse | 1,361.59 mi (2,191.26 km) |
| Towcester to Samokov | 1,326.03 mi (2,134.04 km) |
| Towcester to Sandanski | 1,349.49 mi (2,171.80 km) |
| Towcester to Sevlievo | 1,359.29 mi (2,187.56 km) |
| Towcester to Shumen | 1,423.15 mi (2,290.33 km) |
| Towcester to Silistra | 1,404.27 mi (2,259.95 km) |
| Towcester to Sliven | 1,422.96 mi (2,290.04 km) |
