| Greenock to Madison (New Jersey) | 3,212.52 mi (5,170.05 km) |
| Greenock to Madison (Wisconsin) | 3,649.99 mi (5,874.09 km) |
| Greenock to Madison Heights (Michigan) | 3,452.17 mi (5,555.73 km) |
| Greenock to Madison Heights (Virginia) | 3,551.89 mi (5,716.21 km) |
| Greenock to Madisonville (Kentucky) | 3,870.96 mi (6,229.71 km) |
| Greenock to Magalia (California) | 4,860.03 mi (7,821.45 km) |
| Greenock to Magna (Utah) | 4,527.73 mi (7,286.67 km) |
| Greenock to Magnolia (Arkansas) | 4,294.00 mi (6,910.52 km) |
| Greenock to Maili (Hawaii) | 6,869.04 mi (11,054.64 km) |
| Greenock to Maitland (Florida) | 4,095.90 mi (6,591.72 km) |
| Greenock to Makakilo (Hawaii) | 6,871.20 mi (11,058.13 km) |
| Greenock to Malden (Massachusetts) | 3,006.67 mi (4,838.77 km) |
| Greenock to Malibu (California) | 5,115.94 mi (8,233.30 km) |
| Greenock to Maltby (Washington) | 4,409.96 mi (7,097.14 km) |
| Greenock to Malvern (Arkansas) | 4,220.77 mi (6,792.67 km) |
