| Southborough to Merrick (New York) | 3,468.97 mi (5,582.76 km) |
| Southborough to Merrifield (Virginia) | 3,698.33 mi (5,951.89 km) |
| Southborough to Merrillville (Indiana) | 3,980.66 mi (6,406.25 km) |
| Southborough to Merritt Island (Florida) | 4,342.11 mi (6,987.95 km) |
| Southborough to Mesa (Arizona) | 5,288.27 mi (8,510.65 km) |
| Southborough to Mesquite (Nevada) | 5,180.50 mi (8,337.21 km) |
| Southborough to Mesquite (Texas) | 4,766.61 mi (7,671.12 km) |
| Southborough to Metairie (Louisiana) | 4,652.92 mi (7,488.15 km) |
| Southborough to Methuen Town (Massachusetts) | 3,284.71 mi (5,286.23 km) |
| Southborough to Metuchen (New Jersey) | 3,506.88 mi (5,643.78 km) |
| Southborough to Mexico (Missouri) | 4,264.51 mi (6,863.07 km) |
| Southborough to Miami (Florida) | 4,448.89 mi (7,159.80 km) |
| Southborough to Miami (Oklahoma) | 4,491.02 mi (7,227.61 km) |
| Southborough to Miami Beach (Florida) | 4,444.22 mi (7,152.28 km) |
| Southborough to Miami Gardens (Florida) | 4,442.27 mi (7,149.14 km) |
