| Grenzach-Wyhlen to Popovo | 943.24 mi (1,518.00 km) |
| Grenzach-Wyhlen to Provadia | 1,002.99 mi (1,614.16 km) |
| Grenzach-Wyhlen to Radnevo | 961.88 mi (1,548.00 km) |
| Grenzach-Wyhlen to Radomir | 820.64 mi (1,320.69 km) |
| Grenzach-Wyhlen to Rakitovo | 890.45 mi (1,433.04 km) |
| Grenzach-Wyhlen to Rakovski | 918.92 mi (1,478.86 km) |
| Grenzach-Wyhlen to Razgrad | 951.09 mi (1,530.63 km) |
| Grenzach-Wyhlen to Razlog | 867.11 mi (1,395.48 km) |
| Grenzach-Wyhlen to Ruse | 917.36 mi (1,476.36 km) |
| Grenzach-Wyhlen to Samokov | 854.71 mi (1,375.53 km) |
| Grenzach-Wyhlen to Sandanski | 870.96 mi (1,401.67 km) |
| Grenzach-Wyhlen to Sevlievo | 901.83 mi (1,451.36 km) |
| Grenzach-Wyhlen to Shumen | 977.21 mi (1,572.66 km) |
| Grenzach-Wyhlen to Silistra | 970.10 mi (1,561.23 km) |
| Grenzach-Wyhlen to Sliven | 967.68 mi (1,557.33 km) |
