| Willoughby to Pelham (Alabama) | 645.90 mi (1,039.48 km) |
| Willoughby to Pell City (Alabama) | 618.41 mi (995.24 km) |
| Willoughby to Pella (Iowa) | 595.20 mi (957.88 km) |
| Willoughby to Pembroke Pines (Florida) | 1,081.86 mi (1,741.09 km) |
| Willoughby to Pendleton (Oregon) | 1,873.23 mi (3,014.67 km) |
| Willoughby to Pensacola (Florida) | 838.33 mi (1,349.17 km) |
| Willoughby to Peoria (Arizona) | 1,762.65 mi (2,836.72 km) |
| Willoughby to Peoria (Illinois) | 430.94 mi (693.53 km) |
| Willoughby to Perris (California) | 2,015.41 mi (3,243.48 km) |
| Willoughby to Perry (Georgia) | 646.56 mi (1,040.54 km) |
| Willoughby to Perry Hall (Maryland) | 301.56 mi (485.31 km) |
| Willoughby to Perrysburg (Ohio) | 115.62 mi (186.08 km) |
| Willoughby to Perth Amboy (New Jersey) | 379.57 mi (610.86 km) |
| Willoughby to Peru (Indiana) | 250.20 mi (402.66 km) |
| Willoughby to Petal (Mississippi) | 832.98 mi (1,340.55 km) |
