| Rocky River to Popovo | 5,072.48 mi (8,163.36 km) |
| Rocky River to Provadia | 5,124.86 mi (8,247.66 km) |
| Rocky River to Radnevo | 5,109.75 mi (8,223.36 km) |
| Rocky River to Radomir | 4,983.97 mi (8,020.93 km) |
| Rocky River to Rakitovo | 5,053.42 mi (8,132.70 km) |
| Rocky River to Rakovski | 5,073.42 mi (8,164.88 km) |
| Rocky River to Razgrad | 5,074.55 mi (8,166.70 km) |
| Rocky River to Razlog | 5,034.04 mi (8,101.50 km) |
| Rocky River to Ruse | 5,040.25 mi (8,111.49 km) |
| Rocky River to Samokov | 5,016.98 mi (8,074.05 km) |
| Rocky River to Sandanski | 5,041.09 mi (8,112.86 km) |
| Rocky River to Sevlievo | 5,045.29 mi (8,119.60 km) |
| Rocky River to Shumen | 5,101.64 mi (8,210.30 km) |
| Rocky River to Silistra | 5,074.87 mi (8,167.22 km) |
| Rocky River to Sliven | 5,107.10 mi (8,219.09 km) |
