| Columbia Heights to Popovo | 5,287.56 mi (8,509.51 km) |
| Columbia Heights to Provadia | 5,334.43 mi (8,584.93 km) |
| Columbia Heights to Radnevo | 5,334.14 mi (8,584.47 km) |
| Columbia Heights to Radomir | 5,222.99 mi (8,405.60 km) |
| Columbia Heights to Rakitovo | 5,290.41 mi (8,514.09 km) |
| Columbia Heights to Rakovski | 5,303.30 mi (8,534.83 km) |
| Columbia Heights to Razgrad | 5,286.72 mi (8,508.16 km) |
| Columbia Heights to Razlog | 5,275.16 mi (8,489.55 km) |
| Columbia Heights to Ruse | 5,253.42 mi (8,454.56 km) |
| Columbia Heights to Samokov | 5,254.28 mi (8,455.94 km) |
| Columbia Heights to Sandanski | 5,285.54 mi (8,506.25 km) |
| Columbia Heights to Sevlievo | 5,268.96 mi (8,479.56 km) |
| Columbia Heights to Shumen | 5,313.30 mi (8,550.93 km) |
| Columbia Heights to Silistra | 5,278.65 mi (8,495.16 km) |
| Columbia Heights to Sliven | 5,326.47 mi (8,572.13 km) |
