| Duffel to Mauldin (South Carolina) | 4,269.90 mi (6,871.74 km) |
| Duffel to Maumee (Ohio) | 4,000.94 mi (6,438.88 km) |
| Duffel to Maumelle (Arkansas) | 4,663.82 mi (7,505.70 km) |
| Duffel to Mayagüez (Puerto Rico) | 4,455.17 mi (7,169.90 km) |
| Duffel to Mayfield Heights (Ohio) | 3,918.17 mi (6,305.69 km) |
| Duffel to Mays Chapel (Maryland) | 3,823.17 mi (6,152.80 km) |
| Duffel to Maywood (California) | 5,607.37 mi (9,024.19 km) |
| Duffel to Maywood (Illinois) | 4,144.36 mi (6,669.70 km) |
| Duffel to McAlester (Oklahoma) | 4,787.71 mi (7,705.07 km) |
| Duffel to McAllen (Texas) | 5,342.51 mi (8,597.93 km) |
| Duffel to McCalla (Alabama) | 4,532.40 mi (7,294.20 km) |
| Duffel to McComb (Mississippi) | 4,773.32 mi (7,681.91 km) |
| Duffel to McDonough (Georgia) | 4,410.18 mi (7,097.50 km) |
| Duffel to McFarland (California) | 5,540.35 mi (8,916.34 km) |
| Duffel to McHenry (Illinois) | 4,139.19 mi (6,661.38 km) |
