| Willoughby to Morris (Illinois) | 363.70 mi (585.31 km) |
| Willoughby to Morristown (New Jersey) | 364.86 mi (587.18 km) |
| Willoughby to Morristown (Tennessee) | 389.46 mi (626.77 km) |
| Willoughby to Morrisville (North Carolina) | 424.60 mi (683.33 km) |
| Willoughby to Morro Bay (California) | 2,156.60 mi (3,470.71 km) |
| Willoughby to Morton (Illinois) | 425.24 mi (684.36 km) |
| Willoughby to Morton Grove (Illinois) | 329.48 mi (530.25 km) |
| Willoughby to Moscow (Idaho) | 1,781.99 mi (2,867.84 km) |
| Willoughby to Moses Lake (Washington) | 1,888.37 mi (3,039.04 km) |
| Willoughby to Moss Bluff (Louisiana) | 1,022.25 mi (1,645.16 km) |
| Willoughby to Moss Point (Mississippi) | 870.67 mi (1,401.21 km) |
| Willoughby to Moultrie (Georgia) | 736.29 mi (1,184.95 km) |
| Willoughby to Mounds View (Minnesota) | 638.24 mi (1,027.14 km) |
| Willoughby to Mount Airy (North Carolina) | 357.51 mi (575.35 km) |
| Willoughby to Mount Clemens (Michigan) | 100.14 mi (161.16 km) |
