| Cayey to Popovo | 5,483.64 mi (8,825.07 km) |
| Cayey to Provadia | 5,544.91 mi (8,923.67 km) |
| Cayey to Radnevo | 5,487.65 mi (8,831.53 km) |
| Cayey to Radomir | 5,335.84 mi (8,587.20 km) |
| Cayey to Rakitovo | 5,401.28 mi (8,692.52 km) |
| Cayey to Rakovski | 5,440.00 mi (8,754.83 km) |
| Cayey to Razgrad | 5,494.09 mi (8,841.89 km) |
| Cayey to Razlog | 5,372.11 mi (8,645.57 km) |
| Cayey to Ruse | 5,461.77 mi (8,789.87 km) |
| Cayey to Samokov | 5,369.25 mi (8,640.97 km) |
| Cayey to Sandanski | 5,367.92 mi (8,638.83 km) |
| Cayey to Sevlievo | 5,434.70 mi (8,746.30 km) |
| Cayey to Shumen | 5,518.81 mi (8,881.67 km) |
| Cayey to Silistra | 5,519.23 mi (8,882.34 km) |
| Cayey to Sliven | 5,500.47 mi (8,852.15 km) |
