| Nieuwkoop to Karlovo | 1,139.44 mi (1,833.76 km) |
| Nieuwkoop to Karnobat | 1,223.06 mi (1,968.33 km) |
| Nieuwkoop to Kavarna | 1,241.50 mi (1,998.01 km) |
| Nieuwkoop to Kazanlak | 1,163.08 mi (1,871.80 km) |
| Nieuwkoop to Knezha | 1,072.87 mi (1,726.62 km) |
| Nieuwkoop to Kostinbrod | 1,072.14 mi (1,725.44 km) |
| Nieuwkoop to Kozloduy | 1,046.85 mi (1,684.74 km) |
| Nieuwkoop to Kyustendil | 1,078.61 mi (1,735.85 km) |
| Nieuwkoop to Levski | 1,118.95 mi (1,800.78 km) |
| Nieuwkoop to Lom | 1,026.15 mi (1,651.44 km) |
| Nieuwkoop to Lovech | 1,113.48 mi (1,791.97 km) |
| Nieuwkoop to Lukovit | 1,089.65 mi (1,753.63 km) |
| Nieuwkoop to Lyaskovets | 1,153.28 mi (1,856.03 km) |
| Nieuwkoop to Mezdra | 1,074.42 mi (1,729.11 km) |
| Nieuwkoop to Momchilgrad | 1,214.79 mi (1,955.02 km) |
