| Calais to Popovo | 1,252.35 mi (2,015.47 km) |
| Calais to Provadia | 1,309.18 mi (2,106.92 km) |
| Calais to Radnevo | 1,281.15 mi (2,061.81 km) |
| Calais to Radomir | 1,148.96 mi (1,849.07 km) |
| Calais to Rakitovo | 1,218.74 mi (1,961.37 km) |
| Calais to Rakovski | 1,241.81 mi (1,998.51 km) |
| Calais to Razgrad | 1,257.38 mi (2,023.56 km) |
| Calais to Razlog | 1,198.24 mi (1,928.38 km) |
| Calais to Ruse | 1,222.91 mi (1,968.08 km) |
| Calais to Samokov | 1,182.38 mi (1,902.86 km) |
| Calais to Sandanski | 1,204.69 mi (1,938.77 km) |
| Calais to Sevlievo | 1,218.14 mi (1,960.40 km) |
| Calais to Shumen | 1,284.32 mi (2,066.92 km) |
| Calais to Silistra | 1,267.68 mi (2,040.14 km) |
| Calais to Sliven | 1,282.37 mi (2,063.77 km) |
