| Tucson to Karlovo | 6,555.56 mi (10,550.16 km) |
| Tucson to Karnobat | 6,620.55 mi (10,654.75 km) |
| Tucson to Kavarna | 6,613.30 mi (10,643.08 km) |
| Tucson to Kazanlak | 6,574.86 mi (10,581.21 km) |
| Tucson to Knezha | 6,486.28 mi (10,438.66 km) |
| Tucson to Kostinbrod | 6,497.45 mi (10,456.63 km) |
| Tucson to Kozloduy | 6,460.11 mi (10,396.55 km) |
| Tucson to Kyustendil | 6,509.96 mi (10,476.76 km) |
| Tucson to Levski | 6,525.03 mi (10,501.02 km) |
| Tucson to Lom | 6,442.80 mi (10,368.68 km) |
| Tucson to Lovech | 6,525.56 mi (10,501.87 km) |
| Tucson to Lukovit | 6,505.37 mi (10,469.39 km) |
| Tucson to Lyaskovets | 6,557.19 mi (10,552.77 km) |
| Tucson to Mezdra | 6,493.97 mi (10,451.04 km) |
| Tucson to Momchilgrad | 6,635.92 mi (10,679.47 km) |
