| Willoughby to Malvern (Arkansas) | 797.81 mi (1,283.95 km) |
| Willoughby to Manassas (Virginia) | 288.02 mi (463.53 km) |
| Willoughby to Manassas Park (Virginia) | 288.46 mi (464.23 km) |
| Willoughby to Manatí (Puerto Rico) | 1,829.56 mi (2,944.39 km) |
| Willoughby to Manchester (Missouri) | 524.90 mi (844.74 km) |
| Willoughby to Manchester (New Hampshire) | 517.07 mi (832.14 km) |
| Willoughby to Manchester (Tennessee) | 495.93 mi (798.12 km) |
| Willoughby to Manchester (Virginia) | 353.33 mi (568.63 km) |
| Willoughby to Mandan (North Dakota) | 1,025.27 mi (1,650.02 km) |
| Willoughby to Mandeville (Louisiana) | 916.39 mi (1,474.78 km) |
| Willoughby to Mango (Florida) | 944.79 mi (1,520.50 km) |
| Willoughby to Manhattan (Kansas) | 816.06 mi (1,313.32 km) |
| Willoughby to Manhattan (New York) | 391.24 mi (629.65 km) |
| Willoughby to Manhattan Beach (California) | 2,072.87 mi (3,335.95 km) |
| Willoughby to Manitowoc (Wisconsin) | 359.89 mi (579.18 km) |
