| Sterling Heights to Popovo | 5,062.62 mi (8,147.49 km) |
| Sterling Heights to Provadia | 5,114.16 mi (8,230.45 km) |
| Sterling Heights to Radnevo | 5,101.52 mi (8,210.11 km) |
| Sterling Heights to Radomir | 4,978.03 mi (8,011.37 km) |
| Sterling Heights to Rakitovo | 5,047.24 mi (8,122.76 km) |
| Sterling Heights to Rakovski | 5,066.06 mi (8,153.04 km) |
| Sterling Heights to Razgrad | 5,064.20 mi (8,150.05 km) |
| Sterling Heights to Razlog | 5,028.54 mi (8,092.65 km) |
| Sterling Heights to Ruse | 5,030.01 mi (8,095.02 km) |
| Sterling Heights to Samokov | 5,010.80 mi (8,064.10 km) |
| Sterling Heights to Sandanski | 5,036.18 mi (8,104.94 km) |
| Sterling Heights to Sevlievo | 5,036.83 mi (8,106.00 km) |
| Sterling Heights to Shumen | 5,091.26 mi (8,193.59 km) |
| Sterling Heights to Silistra | 5,063.13 mi (8,148.32 km) |
| Sterling Heights to Sliven | 5,098.02 mi (8,204.47 km) |
