| Rock Springs to Popovo | 5,948.48 mi (9,573.16 km) |
| Rock Springs to Provadia | 5,989.72 mi (9,639.52 km) |
| Rock Springs to Radnevo | 6,002.13 mi (9,659.49 km) |
| Rock Springs to Radomir | 5,905.12 mi (9,503.37 km) |
| Rock Springs to Rakitovo | 5,969.71 mi (9,607.32 km) |
| Rock Springs to Rakovski | 5,976.45 mi (9,618.17 km) |
| Rock Springs to Razgrad | 5,945.16 mi (9,567.81 km) |
| Rock Springs to Razlog | 5,958.12 mi (9,588.67 km) |
| Rock Springs to Ruse | 5,913.34 mi (9,516.59 km) |
| Rock Springs to Samokov | 5,934.45 mi (9,550.57 km) |
| Rock Springs to Sandanski | 5,971.04 mi (9,609.46 km) |
| Rock Springs to Sevlievo | 5,937.51 mi (9,555.50 km) |
| Rock Springs to Shumen | 5,970.80 mi (9,609.07 km) |
| Rock Springs to Silistra | 5,929.97 mi (9,543.36 km) |
| Rock Springs to Sliven | 5,990.34 mi (9,640.51 km) |
