| Park Ridge to Popovo | 5,262.92 mi (8,469.86 km) |
| Park Ridge to Provadia | 5,313.13 mi (8,550.65 km) |
| Park Ridge to Radnevo | 5,304.22 mi (8,536.32 km) |
| Park Ridge to Radomir | 5,184.19 mi (8,343.14 km) |
| Park Ridge to Rakitovo | 5,252.99 mi (8,453.86 km) |
| Park Ridge to Rakovski | 5,270.08 mi (8,481.37 km) |
| Park Ridge to Razgrad | 5,263.77 mi (8,471.23 km) |
| Park Ridge to Razlog | 5,235.26 mi (8,425.34 km) |
| Park Ridge to Ruse | 5,229.79 mi (8,416.54 km) |
| Park Ridge to Samokov | 5,216.57 mi (8,395.26 km) |
| Park Ridge to Sandanski | 5,243.71 mi (8,438.94 km) |
| Park Ridge to Sevlievo | 5,239.27 mi (8,431.79 km) |
| Park Ridge to Shumen | 5,290.73 mi (8,514.60 km) |
| Park Ridge to Silistra | 5,260.54 mi (8,466.02 km) |
| Park Ridge to Sliven | 5,299.46 mi (8,528.65 km) |
