| Killarney to McKeesport (Pennsylvania) | 3,321.34 mi (5,345.19 km) |
| Killarney to McKinleyville (California) | 4,913.43 mi (7,907.40 km) |
| Killarney to McKinney (Texas) | 4,337.97 mi (6,981.29 km) |
| Killarney to McLean (Virginia) | 3,272.93 mi (5,267.27 km) |
| Killarney to McMinnville (Oregon) | 4,650.85 mi (7,484.83 km) |
| Killarney to McMinnville (Tennessee) | 3,776.05 mi (6,076.96 km) |
| Killarney to McNair (Virginia) | 3,281.62 mi (5,281.25 km) |
| Killarney to McPherson (Kansas) | 4,122.30 mi (6,634.19 km) |
| Killarney to Mead Valley (California) | 5,081.90 mi (8,178.53 km) |
| Killarney to Meadow Woods (Florida) | 3,944.39 mi (6,347.88 km) |
| Killarney to Meadowbrook (Virginia) | 3,351.68 mi (5,394.01 km) |
| Killarney to Meadville (Pennsylvania) | 3,277.58 mi (5,274.75 km) |
| Killarney to Mebane (North Carolina) | 3,487.83 mi (5,613.11 km) |
| Killarney to Mechanicsville (Virginia) | 3,337.98 mi (5,371.96 km) |
| Killarney to Medford (Massachusetts) | 2,873.77 mi (4,624.89 km) |
