| Rapid City to Devnya | 5,685.33 mi (9,149.66 km) |
| Rapid City to Dimitrovgrad | 5,696.62 mi (9,167.82 km) |
| Rapid City to Dobrich | 5,672.44 mi (9,128.91 km) |
| Rapid City to Dospat | 5,677.23 mi (9,136.62 km) |
| Rapid City to Dupnitsa | 5,611.36 mi (9,030.61 km) |
| Rapid City to Elhovo | 5,717.72 mi (9,201.78 km) |
| Rapid City to Etropole | 5,605.57 mi (9,021.29 km) |
| Rapid City to Gabrovo | 5,642.41 mi (9,080.58 km) |
| Rapid City to Gorna Oryahovitsa | 5,637.73 mi (9,073.04 km) |
| Rapid City to Gotse Delchev | 5,668.99 mi (9,123.35 km) |
| Rapid City to Harmanli | 5,711.96 mi (9,192.51 km) |
| Rapid City to Haskovo | 5,702.31 mi (9,176.97 km) |
| Rapid City to Ihtiman | 5,622.45 mi (9,048.46 km) |
| Rapid City to Isperih | 5,636.22 mi (9,070.62 km) |
| Rapid City to Kardzhali | 5,712.62 mi (9,193.58 km) |
