| Seclin to Popovo | 1,195.58 mi (1,924.09 km) |
| Seclin to Provadia | 1,252.66 mi (2,015.95 km) |
| Seclin to Radnevo | 1,223.73 mi (1,969.40 km) |
| Seclin to Radomir | 1,091.02 mi (1,755.82 km) |
| Seclin to Rakitovo | 1,160.82 mi (1,868.16 km) |
| Seclin to Rakovski | 1,184.17 mi (1,905.74 km) |
| Seclin to Razgrad | 1,200.81 mi (1,932.52 km) |
| Seclin to Razlog | 1,140.20 mi (1,834.98 km) |
| Seclin to Ruse | 1,166.36 mi (1,877.07 km) |
| Seclin to Samokov | 1,124.49 mi (1,809.68 km) |
| Seclin to Sandanski | 1,146.57 mi (1,845.23 km) |
| Seclin to Sevlievo | 1,160.86 mi (1,868.23 km) |
| Seclin to Shumen | 1,227.71 mi (1,975.81 km) |
| Seclin to Silistra | 1,211.78 mi (1,950.17 km) |
| Seclin to Sliven | 1,225.23 mi (1,971.82 km) |
