| Willoughby to Portage (Indiana) | 298.09 mi (479.73 km) |
| Willoughby to Portage (Michigan) | 218.36 mi (351.41 km) |
| Willoughby to Portage (Wisconsin) | 430.18 mi (692.30 km) |
| Willoughby to Portales (New Mexico) | 1,298.28 mi (2,089.37 km) |
| Willoughby to Porterville (California) | 2,044.11 mi (3,289.68 km) |
| Willoughby to Portland (Maine) | 582.50 mi (937.45 km) |
| Willoughby to Portland (Oregon) | 2,058.28 mi (3,312.48 km) |
| Willoughby to Portland (Tennessee) | 443.80 mi (714.23 km) |
| Willoughby to Portland (Texas) | 1,306.83 mi (2,103.14 km) |
| Willoughby to Portsmouth (New Hampshire) | 550.88 mi (886.55 km) |
| Willoughby to Portsmouth (Ohio) | 215.63 mi (347.03 km) |
| Willoughby to Portsmouth (Virginia) | 427.72 mi (688.35 km) |
| Willoughby to Post Falls (Idaho) | 1,778.37 mi (2,862.01 km) |
| Willoughby to Potomac (Maryland) | 286.87 mi (461.68 km) |
| Willoughby to Potomac Park (California) | 2,059.51 mi (3,314.46 km) |
