| Rock Island to Merriam (Kansas) | 275.05 mi (442.65 km) |
| Rock Island to Merrick (New York) | 887.54 mi (1,428.36 km) |
| Rock Island to Merrifield (Virginia) | 725.96 mi (1,168.33 km) |
| Rock Island to Merrillville (Indiana) | 168.92 mi (271.86 km) |
| Rock Island to Merritt Island (Florida) | 1,066.83 mi (1,716.90 km) |
| Rock Island to Mesa (Arizona) | 1,281.98 mi (2,063.14 km) |
| Rock Island to Mesquite (Nevada) | 1,298.17 mi (2,089.19 km) |
| Rock Island to Mesquite (Texas) | 686.26 mi (1,104.43 km) |
| Rock Island to Metairie (Louisiana) | 792.97 mi (1,276.17 km) |
| Rock Island to Methuen Town (Massachusetts) | 995.83 mi (1,602.63 km) |
| Rock Island to Metuchen (New Jersey) | 846.89 mi (1,362.94 km) |
| Rock Island to Mexico (Missouri) | 173.27 mi (278.85 km) |
| Rock Island to Miami (Florida) | 1,235.00 mi (1,987.53 km) |
| Rock Island to Miami (Oklahoma) | 391.01 mi (629.28 km) |
| Rock Island to Miami Beach (Florida) | 1,234.88 mi (1,987.34 km) |
