| Willoughby to Kamen | 4,015.30 mi (6,461.99 km) |
| Willoughby to Kamenz | 4,265.74 mi (6,865.04 km) |
| Willoughby to Kamp-Lintfort | 3,975.35 mi (6,397.70 km) |
| Willoughby to Kandel | 4,120.40 mi (6,631.15 km) |
| Willoughby to Kappeln | 3,997.78 mi (6,433.80 km) |
| Willoughby to Karben | 4,102.91 mi (6,602.99 km) |
| Willoughby to Karlsdorf-Neuthard | 4,132.02 mi (6,649.85 km) |
| Willoughby to Karlsfeld | 4,278.99 mi (6,886.36 km) |
| Willoughby to Karlsruhe | 4,130.96 mi (6,648.14 km) |
| Willoughby to Kassel | 4,093.55 mi (6,587.93 km) |
| Willoughby to Kaufbeuren | 4,258.30 mi (6,853.08 km) |
| Willoughby to Kaufering | 4,261.10 mi (6,857.59 km) |
| Willoughby to Kaufungen | 4,099.27 mi (6,597.13 km) |
| Willoughby to Kehl | 4,123.16 mi (6,635.59 km) |
| Willoughby to Kelheim | 4,268.69 mi (6,869.80 km) |
