| Sintra to Manassas (Virginia) | 3,576.38 mi (5,755.63 km) |
| Sintra to Manassas Park (Virginia) | 3,573.73 mi (5,751.37 km) |
| Sintra to Manatí (Puerto Rico) | 3,672.14 mi (5,909.75 km) |
| Sintra to Manchester (Missouri) | 4,214.57 mi (6,782.70 km) |
| Sintra to Manchester (New Hampshire) | 3,179.86 mi (5,117.50 km) |
| Sintra to Manchester (Tennessee) | 4,101.20 mi (6,600.24 km) |
| Sintra to Manchester (Virginia) | 3,613.74 mi (5,815.76 km) |
| Sintra to Mandan (North Dakota) | 4,401.39 mi (7,083.35 km) |
| Sintra to Mandeville (Louisiana) | 4,478.58 mi (7,207.57 km) |
| Sintra to Mango (Florida) | 4,162.85 mi (6,699.46 km) |
| Sintra to Manhattan (Kansas) | 4,479.51 mi (7,209.07 km) |
| Sintra to Manhattan (New York) | 3,351.05 mi (5,392.99 km) |
| Sintra to Manhattan Beach (California) | 5,667.67 mi (9,121.24 km) |
| Sintra to Manitowoc (Wisconsin) | 3,914.81 mi (6,300.27 km) |
| Sintra to Mankato (Minnesota) | 4,194.21 mi (6,749.92 km) |
