| Risca to Popovo | 1,470.90 mi (2,367.18 km) |
| Risca to Provadia | 1,527.77 mi (2,458.71 km) |
| Risca to Radnevo | 1,499.17 mi (2,412.69 km) |
| Risca to Radomir | 1,365.68 mi (2,197.85 km) |
| Risca to Rakitovo | 1,435.55 mi (2,310.29 km) |
| Risca to Rakovski | 1,459.44 mi (2,348.74 km) |
| Risca to Razgrad | 1,475.97 mi (2,375.34 km) |
| Risca to Razlog | 1,414.47 mi (2,276.37 km) |
| Risca to Ruse | 1,441.50 mi (2,319.86 km) |
| Risca to Samokov | 1,399.26 mi (2,251.89 km) |
| Risca to Sandanski | 1,420.32 mi (2,285.78 km) |
| Risca to Sevlievo | 1,436.35 mi (2,311.58 km) |
| Risca to Shumen | 1,502.90 mi (2,418.69 km) |
| Risca to Silistra | 1,486.16 mi (2,391.74 km) |
| Risca to Sliven | 1,500.71 mi (2,415.16 km) |
