| Grayslake to Popovo | 5,253.04 mi (8,453.95 km) |
| Grayslake to Provadia | 5,303.03 mi (8,534.40 km) |
| Grayslake to Radnevo | 5,294.69 mi (8,520.98 km) |
| Grayslake to Radomir | 5,175.23 mi (8,328.73 km) |
| Grayslake to Rakitovo | 5,243.95 mi (8,439.33 km) |
| Grayslake to Rakovski | 5,260.77 mi (8,466.38 km) |
| Grayslake to Razgrad | 5,253.77 mi (8,455.13 km) |
| Grayslake to Razlog | 5,226.39 mi (8,411.07 km) |
| Grayslake to Ruse | 5,219.83 mi (8,400.51 km) |
| Grayslake to Samokov | 5,207.55 mi (8,380.74 km) |
| Grayslake to Sandanski | 5,234.97 mi (8,424.88 km) |
| Grayslake to Sevlievo | 5,229.71 mi (8,416.41 km) |
| Grayslake to Shumen | 5,280.71 mi (8,498.48 km) |
| Grayslake to Silistra | 5,250.22 mi (8,449.41 km) |
| Grayslake to Sliven | 5,289.73 mi (8,513.00 km) |
