| Rock Island to Montgomeryville (Pennsylvania) | 805.07 mi (1,295.63 km) |
| Rock Island to Monticello (Minnesota) | 309.92 mi (498.77 km) |
| Rock Island to Montrose (Colorado) | 936.30 mi (1,506.84 km) |
| Rock Island to Moody (Alabama) | 587.95 mi (946.21 km) |
| Rock Island to Moore (Oklahoma) | 564.69 mi (908.77 km) |
| Rock Island to Moorestown-Lenola (New Jersey) | 823.33 mi (1,325.02 km) |
| Rock Island to Mooresville (North Carolina) | 665.18 mi (1,070.50 km) |
| Rock Island to Moorhead (Minnesota) | 481.74 mi (775.28 km) |
| Rock Island to Moorpark (California) | 1,612.50 mi (2,595.07 km) |
| Rock Island to Moraga (California) | 1,686.79 mi (2,714.63 km) |
| Rock Island to Moreno Valley (California) | 1,538.53 mi (2,476.03 km) |
| Rock Island to Morgan City (Louisiana) | 813.65 mi (1,309.45 km) |
| Rock Island to Morgan Hill (California) | 1,678.10 mi (2,700.65 km) |
| Rock Island to Morganton (North Carolina) | 621.26 mi (999.83 km) |
| Rock Island to Morgantown (West Virginia) | 572.13 mi (920.75 km) |
