| Napa to Montgomeryville (Pennsylvania) | 2,490.99 mi (4,008.86 km) |
| Napa to Monticello (Minnesota) | 1,536.30 mi (2,472.43 km) |
| Napa to Montrose (Colorado) | 781.47 mi (1,257.66 km) |
| Napa to Moody (Alabama) | 2,016.06 mi (3,244.54 km) |
| Napa to Moore (Oklahoma) | 1,384.19 mi (2,227.63 km) |
| Napa to Moorestown-Lenola (New Jersey) | 2,509.56 mi (4,038.75 km) |
| Napa to Mooresville (North Carolina) | 2,278.85 mi (3,667.45 km) |
| Napa to Moorhead (Minnesota) | 1,420.11 mi (2,285.45 km) |
| Napa to Moorpark (California) | 336.36 mi (541.32 km) |
| Napa to Moraga (California) | 32.81 mi (52.80 km) |
| Napa to Moreno Valley (California) | 414.85 mi (667.64 km) |
| Napa to Morgan City (Louisiana) | 1,867.85 mi (3,006.02 km) |
| Napa to Morgan Hill (California) | 88.19 mi (141.92 km) |
| Napa to Morganton (North Carolina) | 2,228.80 mi (3,586.91 km) |
| Napa to Morgantown (West Virginia) | 2,255.91 mi (3,630.54 km) |
