| River Forest to Popovo | 5,268.00 mi (8,478.03 km) |
| River Forest to Provadia | 5,318.26 mi (8,558.91 km) |
| River Forest to Radnevo | 5,309.19 mi (8,544.31 km) |
| River Forest to Radomir | 5,189.00 mi (8,350.88 km) |
| River Forest to Rakitovo | 5,257.82 mi (8,461.64 km) |
| River Forest to Rakovski | 5,274.99 mi (8,489.27 km) |
| River Forest to Razgrad | 5,268.88 mi (8,479.44 km) |
| River Forest to Razlog | 5,240.05 mi (8,433.04 km) |
| River Forest to Ruse | 5,234.89 mi (8,424.74 km) |
| River Forest to Samokov | 5,221.40 mi (8,403.03 km) |
| River Forest to Sandanski | 5,248.46 mi (8,446.57 km) |
| River Forest to Sevlievo | 5,244.25 mi (8,439.80 km) |
| River Forest to Shumen | 5,295.84 mi (8,522.83 km) |
| River Forest to Silistra | 5,265.74 mi (8,474.39 km) |
| River Forest to Sliven | 5,304.48 mi (8,536.74 km) |
