| Richardson to Karlovo | 6,035.89 mi (9,713.82 km) |
| Richardson to Karnobat | 6,114.61 mi (9,840.51 km) |
| Richardson to Kavarna | 6,121.97 mi (9,852.36 km) |
| Richardson to Kazanlak | 6,058.69 mi (9,750.53 km) |
| Richardson to Knezha | 5,968.50 mi (9,605.36 km) |
| Richardson to Kostinbrod | 5,969.31 mi (9,606.68 km) |
| Richardson to Kozloduy | 5,942.32 mi (9,563.24 km) |
| Richardson to Kyustendil | 5,974.65 mi (9,615.28 km) |
| Richardson to Levski | 6,012.73 mi (9,676.55 km) |
| Richardson to Lom | 5,922.34 mi (9,531.09 km) |
| Richardson to Lovech | 6,008.95 mi (9,670.47 km) |
| Richardson to Lukovit | 5,985.87 mi (9,633.32 km) |
| Richardson to Lyaskovets | 6,046.57 mi (9,731.01 km) |
| Richardson to Mezdra | 5,971.25 mi (9,609.80 km) |
| Richardson to Momchilgrad | 6,111.94 mi (9,836.22 km) |
