| Heerlen to Popovo | 1,080.06 mi (1,738.19 km) |
| Heerlen to Provadia | 1,135.85 mi (1,827.97 km) |
| Heerlen to Radnevo | 1,112.14 mi (1,789.82 km) |
| Heerlen to Radomir | 984.88 mi (1,585.02 km) |
| Heerlen to Rakitovo | 1,054.19 mi (1,696.55 km) |
| Heerlen to Rakovski | 1,074.51 mi (1,729.26 km) |
| Heerlen to Razgrad | 1,084.29 mi (1,744.99 km) |
| Heerlen to Razlog | 1,035.42 mi (1,666.35 km) |
| Heerlen to Ruse | 1,049.77 mi (1,689.44 km) |
| Heerlen to Samokov | 1,017.74 mi (1,637.90 km) |
| Heerlen to Sandanski | 1,043.48 mi (1,679.32 km) |
| Heerlen to Sevlievo | 1,048.34 mi (1,687.14 km) |
| Heerlen to Shumen | 1,111.34 mi (1,788.52 km) |
| Heerlen to Silistra | 1,092.50 mi (1,758.21 km) |
| Heerlen to Sliven | 1,111.68 mi (1,789.08 km) |
