| Willoughby to Petaluma (California) | 2,175.19 mi (3,500.63 km) |
| Willoughby to Petersburg (Virginia) | 374.26 mi (602.31 km) |
| Willoughby to Pflugerville (Texas) | 1,186.55 mi (1,909.57 km) |
| Willoughby to Pharr (Texas) | 1,433.27 mi (2,306.63 km) |
| Willoughby to Phelan (California) | 2,011.49 mi (3,237.19 km) |
| Willoughby to Phenix City (Alabama) | 665.20 mi (1,070.54 km) |
| Willoughby to Philadelphia (Pennsylvania) | 346.92 mi (558.32 km) |
| Willoughby to Phillipsburg (New Jersey) | 330.44 mi (531.79 km) |
| Willoughby to Phoenix (Arizona) | 1,758.64 mi (2,830.27 km) |
| Willoughby to Phoenixville (Pennsylvania) | 324.69 mi (522.53 km) |
| Willoughby to Picayune (Mississippi) | 894.81 mi (1,440.06 km) |
| Willoughby to Pickerington (Ohio) | 140.69 mi (226.42 km) |
| Willoughby to Pico Rivera (California) | 2,053.95 mi (3,305.51 km) |
| Willoughby to Piedmont (California) | 2,164.68 mi (3,483.72 km) |
| Willoughby to Pierre (South Dakota) | 971.61 mi (1,563.66 km) |
