| Willoughby to Platteville (Wisconsin) | 469.56 mi (755.69 km) |
| Willoughby to Plattsburgh (New York) | 452.44 mi (728.13 km) |
| Willoughby to Pleasant Grove (Utah) | 1,575.79 mi (2,535.99 km) |
| Willoughby to Pleasant Hill (California) | 2,153.68 mi (3,466.02 km) |
| Willoughby to Pleasant Hill (Iowa) | 623.85 mi (1,003.99 km) |
| Willoughby to Pleasant Prairie (Wisconsin) | 337.76 mi (543.58 km) |
| Willoughby to Pleasant View (Utah) | 1,575.24 mi (2,535.10 km) |
| Willoughby to Pleasanton (California) | 2,150.46 mi (3,460.83 km) |
| Willoughby to Pleasanton (Texas) | 1,297.78 mi (2,088.58 km) |
| Willoughby to Pleasantville (New Jersey) | 393.95 mi (634.01 km) |
| Willoughby to Plover (Wisconsin) | 453.94 mi (730.55 km) |
| Willoughby to Plum (Pennsylvania) | 117.08 mi (188.42 km) |
| Willoughby to Plymouth (Indiana) | 254.90 mi (410.23 km) |
| Willoughby to Plymouth (Minnesota) | 648.33 mi (1,043.39 km) |
| Willoughby to Pocatello (Idaho) | 1,581.36 mi (2,544.96 km) |
