| Penafiel to Mitchell (South Dakota) | 4,336.15 mi (6,978.36 km) |
| Penafiel to Mitchellville (Maryland) | 3,529.50 mi (5,680.18 km) |
| Penafiel to Moberly (Missouri) | 4,247.63 mi (6,835.91 km) |
| Penafiel to Mobile (Alabama) | 4,369.08 mi (7,031.36 km) |
| Penafiel to Modesto (California) | 5,533.32 mi (8,905.01 km) |
| Penafiel to Mokena (Illinois) | 3,967.14 mi (6,384.50 km) |
| Penafiel to Moline (Illinois) | 4,086.95 mi (6,577.31 km) |
| Penafiel to Moncks Corner (South Carolina) | 3,875.35 mi (6,236.77 km) |
| Penafiel to Monfort Heights (Ohio) | 3,893.55 mi (6,266.06 km) |
| Penafiel to Monmouth (Oregon) | 5,260.33 mi (8,465.68 km) |
| Penafiel to Monroe (Georgia) | 4,036.31 mi (6,495.82 km) |
| Penafiel to Monroe (Louisiana) | 4,490.61 mi (7,226.94 km) |
| Penafiel to Monroe (Michigan) | 3,749.41 mi (6,034.09 km) |
| Penafiel to Monroe (North Carolina) | 3,838.93 mi (6,178.17 km) |
| Penafiel to Monroe (Ohio) | 3,873.55 mi (6,233.87 km) |
