| Allen Park to Popovo | 5,084.70 mi (8,183.04 km) |
| Allen Park to Provadia | 5,136.33 mi (8,266.12 km) |
| Allen Park to Radnevo | 5,123.45 mi (8,245.40 km) |
| Allen Park to Radomir | 4,999.72 mi (8,046.26 km) |
| Allen Park to Rakitovo | 5,068.96 mi (8,157.70 km) |
| Allen Park to Rakovski | 5,087.90 mi (8,188.18 km) |
| Allen Park to Razgrad | 5,086.34 mi (8,185.67 km) |
| Allen Park to Razlog | 5,050.18 mi (8,127.48 km) |
| Allen Park to Ruse | 5,052.13 mi (8,130.62 km) |
| Allen Park to Samokov | 5,032.51 mi (8,099.04 km) |
| Allen Park to Sandanski | 5,057.75 mi (8,139.67 km) |
| Allen Park to Sevlievo | 5,058.78 mi (8,141.31 km) |
| Allen Park to Shumen | 5,113.39 mi (8,229.21 km) |
| Allen Park to Silistra | 5,085.39 mi (8,184.15 km) |
| Allen Park to Sliven | 5,120.03 mi (8,239.90 km) |
