| Willoughby to Kirchlengern | 4,031.51 mi (6,488.10 km) |
| Willoughby to Kirchlinteln | 4,032.18 mi (6,489.17 km) |
| Willoughby to Kirchseeon | 4,300.63 mi (6,921.19 km) |
| Willoughby to Kirchzarten | 4,149.33 mi (6,677.71 km) |
| Willoughby to Kirkel | 4,075.63 mi (6,559.09 km) |
| Willoughby to Kissing | 4,257.09 mi (6,851.12 km) |
| Willoughby to Kisslegg | 4,232.46 mi (6,811.48 km) |
| Willoughby to Kitzingen | 4,173.95 mi (6,717.32 km) |
| Willoughby to Kleinblittersdorf | 4,072.18 mi (6,553.54 km) |
| Willoughby to Kleve | 3,951.13 mi (6,358.73 km) |
| Willoughby to Klipphausen | 4,251.74 mi (6,842.51 km) |
| Willoughby to Klotze | 4,110.06 mi (6,614.50 km) |
| Willoughby to Koblenz | 4,053.57 mi (6,523.59 km) |
| Willoughby to Kolbermoor | 4,315.98 mi (6,945.89 km) |
| Willoughby to Kolkwitz | 4,253.19 mi (6,844.86 km) |
