| Slagelse to Popovo | 1,063.93 mi (1,712.24 km) |
| Slagelse to Provadia | 1,107.26 mi (1,781.97 km) |
| Slagelse to Radnevo | 1,117.34 mi (1,798.18 km) |
| Slagelse to Radomir | 1,029.15 mi (1,656.26 km) |
| Slagelse to Rakitovo | 1,090.28 mi (1,754.64 km) |
| Slagelse to Rakovski | 1,093.21 mi (1,759.35 km) |
| Slagelse to Razgrad | 1,061.29 mi (1,707.98 km) |
| Slagelse to Razlog | 1,082.16 mi (1,741.57 km) |
| Slagelse to Ruse | 1,028.97 mi (1,655.96 km) |
| Slagelse to Samokov | 1,056.17 mi (1,699.74 km) |
| Slagelse to Sandanski | 1,097.63 mi (1,766.47 km) |
| Slagelse to Sevlievo | 1,052.92 mi (1,694.51 km) |
| Slagelse to Shumen | 1,087.32 mi (1,749.88 km) |
| Slagelse to Silistra | 1,049.75 mi (1,689.41 km) |
| Slagelse to Sliven | 1,105.41 mi (1,778.99 km) |
