| Champaign to Mauldin (South Carolina) | 492.68 mi (792.90 km) |
| Champaign to Maumee (Ohio) | 261.07 mi (420.15 km) |
| Champaign to Maumelle (Arkansas) | 428.09 mi (688.94 km) |
| Champaign to Mayagüez (Puerto Rico) | 1,968.63 mi (3,168.20 km) |
| Champaign to Mayfield Heights (Ohio) | 369.47 mi (594.60 km) |
| Champaign to Mays Chapel (Maryland) | 618.51 mi (995.40 km) |
| Champaign to Maywood (California) | 1,694.21 mi (2,726.57 km) |
| Champaign to Maywood (Illinois) | 124.03 mi (199.61 km) |
| Champaign to McAlester (Oklahoma) | 544.99 mi (877.08 km) |
| Champaign to McAllen (Texas) | 1,117.86 mi (1,799.02 km) |
| Champaign to McCalla (Alabama) | 475.65 mi (765.49 km) |
| Champaign to McComb (Mississippi) | 625.09 mi (1,005.98 km) |
| Champaign to McDonough (Georgia) | 514.37 mi (827.80 km) |
| Champaign to McFarland (California) | 1,707.11 mi (2,747.33 km) |
| Champaign to McHenry (Illinois) | 153.70 mi (247.36 km) |
