| Detroit to Popovo | 5,074.76 mi (8,167.04 km) |
| Detroit to Provadia | 5,126.37 mi (8,250.10 km) |
| Detroit to Radnevo | 5,113.55 mi (8,229.46 km) |
| Detroit to Radomir | 4,989.87 mi (8,030.43 km) |
| Detroit to Rakitovo | 5,059.11 mi (8,141.85 km) |
| Detroit to Rakovski | 5,078.02 mi (8,172.28 km) |
| Detroit to Razgrad | 5,076.39 mi (8,169.66 km) |
| Detroit to Razlog | 5,040.35 mi (8,111.66 km) |
| Detroit to Ruse | 5,042.19 mi (8,114.61 km) |
| Detroit to Samokov | 5,022.66 mi (8,083.19 km) |
| Detroit to Sandanski | 5,047.94 mi (8,123.87 km) |
| Detroit to Sevlievo | 5,048.87 mi (8,125.37 km) |
| Detroit to Shumen | 5,103.44 mi (8,213.20 km) |
| Detroit to Silistra | 5,075.41 mi (8,168.09 km) |
| Detroit to Sliven | 5,110.11 mi (8,223.93 km) |
