| Riga to Popovo | 944.18 mi (1,519.51 km) |
| Riga to Provadia | 962.20 mi (1,548.51 km) |
| Riga to Radnevo | 1,015.35 mi (1,634.04 km) |
| Riga to Radomir | 996.17 mi (1,603.18 km) |
| Riga to Rakitovo | 1,034.02 mi (1,664.10 km) |
| Riga to Rakovski | 1,013.65 mi (1,631.31 km) |
| Riga to Razgrad | 932.88 mi (1,501.32 km) |
| Riga to Razlog | 1,041.32 mi (1,675.84 km) |
| Riga to Ruse | 910.46 mi (1,465.25 km) |
| Riga to Samokov | 1,009.87 mi (1,625.23 km) |
| Riga to Sandanski | 1,063.34 mi (1,711.28 km) |
| Riga to Sevlievo | 963.02 mi (1,549.83 km) |
| Riga to Shumen | 952.26 mi (1,532.52 km) |
| Riga to Silistra | 897.10 mi (1,443.74 km) |
| Riga to Sliven | 990.51 mi (1,594.07 km) |
