| Frechen to Popovo | 1,047.16 mi (1,685.24 km) |
| Frechen to Provadia | 1,102.58 mi (1,774.43 km) |
| Frechen to Radnevo | 1,080.27 mi (1,738.53 km) |
| Frechen to Radomir | 954.62 mi (1,536.31 km) |
| Frechen to Rakitovo | 1,023.72 mi (1,647.52 km) |
| Frechen to Rakovski | 1,043.20 mi (1,678.86 km) |
| Frechen to Razgrad | 1,051.12 mi (1,691.61 km) |
| Frechen to Razlog | 1,005.49 mi (1,618.17 km) |
| Frechen to Ruse | 1,016.59 mi (1,636.05 km) |
| Frechen to Samokov | 987.27 mi (1,588.86 km) |
| Frechen to Sandanski | 1,014.00 mi (1,631.88 km) |
| Frechen to Sevlievo | 1,016.26 mi (1,635.51 km) |
| Frechen to Shumen | 1,078.19 mi (1,735.18 km) |
| Frechen to Silistra | 1,058.61 mi (1,703.66 km) |
| Frechen to Sliven | 1,079.29 mi (1,736.95 km) |
