| Knowle to Popovo | 1,426.66 mi (2,295.98 km) |
| Knowle to Provadia | 1,482.42 mi (2,385.72 km) |
| Knowle to Radnevo | 1,458.09 mi (2,346.57 km) |
| Knowle to Radomir | 1,328.49 mi (2,137.99 km) |
| Knowle to Rakitovo | 1,398.10 mi (2,250.02 km) |
| Knowle to Rakovski | 1,419.80 mi (2,284.95 km) |
| Knowle to Razgrad | 1,430.88 mi (2,302.78 km) |
| Knowle to Razlog | 1,378.30 mi (2,218.16 km) |
| Knowle to Ruse | 1,396.36 mi (2,247.22 km) |
| Knowle to Samokov | 1,361.69 mi (2,191.42 km) |
| Knowle to Sandanski | 1,385.33 mi (2,229.47 km) |
| Knowle to Sevlievo | 1,394.51 mi (2,244.24 km) |
| Knowle to Shumen | 1,457.93 mi (2,346.31 km) |
| Knowle to Silistra | 1,438.64 mi (2,315.26 km) |
| Knowle to Sliven | 1,458.08 mi (2,346.55 km) |
