| Colton to Karlovo | 6,621.97 mi (10,657.03 km) |
| Colton to Karnobat | 6,677.78 mi (10,746.84 km) |
| Colton to Kavarna | 6,661.87 mi (10,721.24 km) |
| Colton to Kazanlak | 6,638.87 mi (10,684.24 km) |
| Colton to Knezha | 6,552.43 mi (10,545.12 km) |
| Colton to Kostinbrod | 6,569.78 mi (10,573.04 km) |
| Colton to Kozloduy | 6,526.61 mi (10,503.56 km) |
| Colton to Kyustendil | 6,586.56 mi (10,600.04 km) |
| Colton to Levski | 6,587.36 mi (10,601.32 km) |
| Colton to Lom | 6,511.14 mi (10,478.67 km) |
| Colton to Lovech | 6,590.48 mi (10,606.35 km) |
| Colton to Lukovit | 6,572.33 mi (10,577.14 km) |
| Colton to Lyaskovets | 6,618.07 mi (10,650.75 km) |
| Colton to Mezdra | 6,563.04 mi (10,562.19 km) |
| Colton to Momchilgrad | 6,703.92 mi (10,788.91 km) |
