| Killarney to Mauldin (South Carolina) | 3,674.64 mi (5,913.76 km) |
| Killarney to Maumee (Ohio) | 3,423.11 mi (5,508.96 km) |
| Killarney to Maumelle (Arkansas) | 4,085.42 mi (6,574.85 km) |
| Killarney to Mayagüez (Puerto Rico) | 3,870.07 mi (6,228.27 km) |
| Killarney to Mayfield Heights (Ohio) | 3,336.18 mi (5,369.06 km) |
| Killarney to Mays Chapel (Maryland) | 3,228.99 mi (5,196.56 km) |
| Killarney to Maywood (California) | 5,104.87 mi (8,215.50 km) |
| Killarney to Maywood (Illinois) | 3,575.96 mi (5,754.96 km) |
| Killarney to McAlester (Oklahoma) | 4,216.83 mi (6,786.33 km) |
| Killarney to McAllen (Texas) | 4,757.82 mi (7,656.97 km) |
| Killarney to McCalla (Alabama) | 3,941.18 mi (6,342.72 km) |
| Killarney to McComb (Mississippi) | 4,183.82 mi (6,733.21 km) |
| Killarney to McDonough (Georgia) | 3,815.15 mi (6,139.89 km) |
| Killarney to McFarland (California) | 5,048.17 mi (8,124.24 km) |
| Killarney to McHenry (Illinois) | 3,573.30 mi (5,750.67 km) |
