| Sintra to Morristown (New Jersey) | 3,375.84 mi (5,432.89 km) |
| Sintra to Morristown (Tennessee) | 3,939.56 mi (6,340.10 km) |
| Sintra to Morrisville (North Carolina) | 3,726.69 mi (5,997.54 km) |
| Sintra to Morro Bay (California) | 5,701.56 mi (9,175.77 km) |
| Sintra to Morton (Illinois) | 4,100.58 mi (6,599.24 km) |
| Sintra to Morton Grove (Illinois) | 3,979.01 mi (6,403.60 km) |
| Sintra to Moscow (Idaho) | 5,034.44 mi (8,102.15 km) |
| Sintra to Moses Lake (Washington) | 5,099.71 mi (8,207.19 km) |
| Sintra to Moss Bluff (Louisiana) | 4,638.23 mi (7,464.51 km) |
| Sintra to Moss Point (Mississippi) | 4,397.52 mi (7,077.12 km) |
| Sintra to Moultrie (Georgia) | 4,128.43 mi (6,644.06 km) |
| Sintra to Mounds View (Minnesota) | 4,131.34 mi (6,648.75 km) |
| Sintra to Mount Airy (North Carolina) | 3,796.27 mi (6,109.50 km) |
| Sintra to Mount Clemens (Michigan) | 3,734.37 mi (6,009.88 km) |
| Sintra to Mount Dora (Florida) | 4,098.71 mi (6,596.24 km) |
