| Billings to Karlovo | 5,688.68 mi (9,155.05 km) |
| Billings to Karnobat | 5,744.80 mi (9,245.36 km) |
| Billings to Kavarna | 5,729.64 mi (9,220.96 km) |
| Billings to Kazanlak | 5,705.62 mi (9,182.30 km) |
| Billings to Knezha | 5,619.14 mi (9,043.14 km) |
| Billings to Kostinbrod | 5,636.59 mi (9,071.21 km) |
| Billings to Kozloduy | 5,593.32 mi (9,001.58 km) |
| Billings to Kyustendil | 5,653.56 mi (9,098.53 km) |
| Billings to Levski | 5,654.13 mi (9,099.44 km) |
| Billings to Lom | 5,577.86 mi (8,976.70 km) |
| Billings to Lovech | 5,657.20 mi (9,104.39 km) |
| Billings to Lukovit | 5,639.04 mi (9,075.16 km) |
| Billings to Lyaskovets | 5,684.90 mi (9,148.96 km) |
| Billings to Mezdra | 5,629.77 mi (9,060.23 km) |
| Billings to Momchilgrad | 5,770.63 mi (9,286.93 km) |
