| Penafiel to Monticello (Minnesota) | 4,101.47 mi (6,600.68 km) |
| Penafiel to Montrose (Colorado) | 4,963.00 mi (7,987.17 km) |
| Penafiel to Moody (Alabama) | 4,179.52 mi (6,726.29 km) |
| Penafiel to Moore (Oklahoma) | 4,634.08 mi (7,457.83 km) |
| Penafiel to Moorestown-Lenola (New Jersey) | 3,409.90 mi (5,487.71 km) |
| Penafiel to Mooresville (North Carolina) | 3,832.33 mi (6,167.55 km) |
| Penafiel to Moorhead (Minnesota) | 4,170.44 mi (6,711.68 km) |
| Penafiel to Moorpark (California) | 5,612.47 mi (9,032.39 km) |
| Penafiel to Moraga (California) | 5,566.04 mi (8,957.67 km) |
| Penafiel to Moreno Valley (California) | 5,561.27 mi (8,950.00 km) |
| Penafiel to Morgan City (Louisiana) | 4,558.52 mi (7,336.23 km) |
| Penafiel to Morgan Hill (California) | 5,582.80 mi (8,984.64 km) |
| Penafiel to Morganton (North Carolina) | 3,869.71 mi (6,227.70 km) |
| Penafiel to Morgantown (West Virginia) | 3,658.38 mi (5,887.60 km) |
| Penafiel to Morris (Illinois) | 3,997.46 mi (6,433.30 km) |
