| Clay Cross to Popovo | 1,428.56 mi (2,299.04 km) |
| Clay Cross to Provadia | 1,483.28 mi (2,387.10 km) |
| Clay Cross to Radnevo | 1,462.59 mi (2,353.80 km) |
| Clay Cross to Radomir | 1,336.36 mi (2,150.67 km) |
| Clay Cross to Rakitovo | 1,405.65 mi (2,262.17 km) |
| Clay Cross to Rakovski | 1,425.55 mi (2,294.20 km) |
| Clay Cross to Razgrad | 1,432.04 mi (2,304.65 km) |
| Clay Cross to Razlog | 1,386.89 mi (2,231.99 km) |
| Clay Cross to Ruse | 1,397.54 mi (2,249.12 km) |
| Clay Cross to Samokov | 1,369.20 mi (2,203.51 km) |
| Clay Cross to Sandanski | 1,394.82 mi (2,244.75 km) |
| Clay Cross to Sevlievo | 1,398.49 mi (2,250.65 km) |
| Clay Cross to Shumen | 1,459.15 mi (2,348.28 km) |
| Clay Cross to Silistra | 1,437.66 mi (2,313.69 km) |
| Clay Cross to Sliven | 1,461.28 mi (2,351.71 km) |
