| Willoughby to Missouri City (Texas) | 1,148.85 mi (1,848.89 km) |
| Willoughby to Mitchell (South Dakota) | 855.03 mi (1,376.05 km) |
| Willoughby to Mitchellville (Maryland) | 305.99 mi (492.44 km) |
| Willoughby to Moberly (Missouri) | 598.76 mi (963.61 km) |
| Willoughby to Mobile (Alabama) | 844.45 mi (1,359.01 km) |
| Willoughby to Modesto (California) | 2,106.08 mi (3,389.41 km) |
| Willoughby to Mokena (Illinois) | 334.34 mi (538.07 km) |
| Willoughby to Moline (Illinois) | 469.51 mi (755.60 km) |
| Willoughby to Moncks Corner (South Carolina) | 590.40 mi (950.16 km) |
| Willoughby to Monfort Heights (Ohio) | 239.33 mi (385.17 km) |
| Willoughby to Monmouth (Oregon) | 2,092.92 mi (3,368.23 km) |
| Willoughby to Monroe (Georgia) | 556.58 mi (895.73 km) |
| Willoughby to Monroe (Louisiana) | 860.93 mi (1,385.53 km) |
| Willoughby to Monroe (Michigan) | 103.52 mi (166.60 km) |
| Willoughby to Monroe (North Carolina) | 461.05 mi (741.98 km) |
