| Park Forest to Popovo | 5,284.16 mi (8,504.03 km) |
| Park Forest to Provadia | 5,334.64 mi (8,585.28 km) |
| Park Forest to Radnevo | 5,324.95 mi (8,569.69 km) |
| Park Forest to Radomir | 5,204.15 mi (8,375.26 km) |
| Park Forest to Rakitovo | 5,273.05 mi (8,486.15 km) |
| Park Forest to Rakovski | 5,290.52 mi (8,514.27 km) |
| Park Forest to Razgrad | 5,285.16 mi (8,505.65 km) |
| Park Forest to Razlog | 5,255.10 mi (8,457.27 km) |
| Park Forest to Ruse | 5,251.13 mi (8,450.88 km) |
| Park Forest to Samokov | 5,236.62 mi (8,427.52 km) |
| Park Forest to Sandanski | 5,263.36 mi (8,470.56 km) |
| Park Forest to Sevlievo | 5,260.05 mi (8,465.23 km) |
| Park Forest to Shumen | 5,312.14 mi (8,549.06 km) |
| Park Forest to Silistra | 5,282.36 mi (8,501.14 km) |
| Park Forest to Sliven | 5,320.46 mi (8,562.45 km) |
