| Willoughby to Merriam (Kansas) | 722.06 mi (1,162.04 km) |
| Willoughby to Merrick (New York) | 414.25 mi (666.68 km) |
| Willoughby to Merrifield (Virginia) | 291.39 mi (468.95 km) |
| Willoughby to Merrillville (Indiana) | 305.79 mi (492.11 km) |
| Willoughby to Merritt Island (Florida) | 922.09 mi (1,483.96 km) |
| Willoughby to Mesa (Arizona) | 1,745.17 mi (2,808.58 km) |
| Willoughby to Mesquite (Nevada) | 1,772.18 mi (2,852.05 km) |
| Willoughby to Mesquite (Texas) | 1,034.08 mi (1,664.19 km) |
| Willoughby to Metairie (Louisiana) | 941.70 mi (1,515.53 km) |
| Willoughby to Methuen Town (Massachusetts) | 528.20 mi (850.06 km) |
| Willoughby to Metuchen (New Jersey) | 374.59 mi (602.85 km) |
| Willoughby to Mexico (Missouri) | 576.17 mi (927.26 km) |
| Willoughby to Miami (Florida) | 1,098.08 mi (1,767.19 km) |
| Willoughby to Miami (Oklahoma) | 790.47 mi (1,272.14 km) |
| Willoughby to Miami Beach (Florida) | 1,096.06 mi (1,763.93 km) |
