| Willoughby to Kihei (Hawaii) | 4,519.89 mi (7,274.06 km) |
| Willoughby to Kilgore (Texas) | 977.13 mi (1,572.53 km) |
| Willoughby to Killeen (Texas) | 1,161.89 mi (1,869.89 km) |
| Willoughby to King City (California) | 2,148.38 mi (3,457.49 km) |
| Willoughby to King of Prussia (Pennsylvania) | 332.48 mi (535.07 km) |
| Willoughby to Kingman (Arizona) | 1,807.92 mi (2,909.57 km) |
| Willoughby to Kings Mountain (North Carolina) | 442.97 mi (712.89 km) |
| Willoughby to Kings Park (New York) | 426.88 mi (687.00 km) |
| Willoughby to Kings Park West (Virginia) | 292.02 mi (469.96 km) |
| Willoughby to Kingsburg (California) | 2,059.30 mi (3,314.12 km) |
| Willoughby to Kingsland (Georgia) | 748.24 mi (1,204.18 km) |
| Willoughby to Kingsport (Tennessee) | 359.20 mi (578.08 km) |
| Willoughby to Kingston (New York) | 382.21 mi (615.11 km) |
| Willoughby to Kingston (Pennsylvania) | 287.04 mi (461.95 km) |
| Willoughby to Kingstowne (Virginia) | 300.46 mi (483.54 km) |
