| Willoughby to Hillcrest Heights (Maryland) | 304.22 mi (489.60 km) |
| Willoughby to Hilliard (Ohio) | 144.03 mi (231.79 km) |
| Willoughby to Hillsboro (Oregon) | 2,072.09 mi (3,334.71 km) |
| Willoughby to Hillsborough (California) | 2,177.62 mi (3,504.54 km) |
| Willoughby to Hillsborough (New Jersey) | 360.48 mi (580.13 km) |
| Willoughby to Hilo (Hawaii) | 4,495.46 mi (7,234.74 km) |
| Willoughby to Hilton Head Island (South Carolina) | 654.37 mi (1,053.11 km) |
| Willoughby to Hinesville (Georgia) | 678.67 mi (1,092.21 km) |
| Willoughby to Hinsdale (Illinois) | 336.26 mi (541.16 km) |
| Willoughby to Hobart (Indiana) | 303.18 mi (487.92 km) |
| Willoughby to Hobbs (New Mexico) | 1,341.25 mi (2,158.53 km) |
| Willoughby to Hobe Sound (Florida) | 1,009.45 mi (1,624.55 km) |
| Willoughby to Hoboken (New Jersey) | 388.59 mi (625.38 km) |
| Willoughby to Hockessin (Delaware) | 326.27 mi (525.07 km) |
| Willoughby to Hoffman Estates (Illinois) | 347.89 mi (559.87 km) |
