| Knowsley to Popovo | 1,491.07 mi (2,399.64 km) |
| Knowsley to Provadia | 1,545.74 mi (2,487.62 km) |
| Knowsley to Radnevo | 1,525.12 mi (2,454.45 km) |
| Knowsley to Radomir | 1,398.73 mi (2,251.04 km) |
| Knowsley to Rakitovo | 1,468.04 mi (2,362.59 km) |
| Knowsley to Rakovski | 1,488.05 mi (2,394.79 km) |
| Knowsley to Razgrad | 1,494.53 mi (2,405.21 km) |
| Knowsley to Razlog | 1,449.20 mi (2,332.26 km) |
| Knowsley to Ruse | 1,460.02 mi (2,349.68 km) |
| Knowsley to Samokov | 1,431.59 mi (2,303.93 km) |
| Knowsley to Sandanski | 1,457.03 mi (2,344.87 km) |
| Knowsley to Sevlievo | 1,461.03 mi (2,351.30 km) |
| Knowsley to Shumen | 1,521.63 mi (2,448.83 km) |
| Knowsley to Silistra | 1,499.99 mi (2,414.00 km) |
| Knowsley to Sliven | 1,523.83 mi (2,452.36 km) |
