| Western Springs to Popovo | 5,275.53 mi (8,490.15 km) |
| Western Springs to Provadia | 5,325.81 mi (8,571.06 km) |
| Western Springs to Radnevo | 5,316.70 mi (8,556.40 km) |
| Western Springs to Radomir | 5,196.47 mi (8,362.91 km) |
| Western Springs to Rakitovo | 5,265.29 mi (8,473.67 km) |
| Western Springs to Rakovski | 5,282.48 mi (8,501.34 km) |
| Western Springs to Razgrad | 5,276.42 mi (8,491.58 km) |
| Western Springs to Razlog | 5,247.51 mi (8,445.06 km) |
| Western Springs to Ruse | 5,242.43 mi (8,436.87 km) |
| Western Springs to Samokov | 5,228.87 mi (8,415.06 km) |
| Western Springs to Sandanski | 5,255.91 mi (8,458.57 km) |
| Western Springs to Sevlievo | 5,251.76 mi (8,451.89 km) |
| Western Springs to Shumen | 5,303.38 mi (8,534.96 km) |
| Western Springs to Silistra | 5,273.29 mi (8,486.55 km) |
| Western Springs to Sliven | 5,312.00 mi (8,548.84 km) |
