| Sintra to Mendota Heights (Minnesota) | 4,135.29 mi (6,655.11 km) |
| Sintra to Menifee (California) | 5,624.79 mi (9,052.22 km) |
| Sintra to Menlo Park (California) | 5,655.63 mi (9,101.85 km) |
| Sintra to Menomonee Falls (Wisconsin) | 3,962.04 mi (6,376.29 km) |
| Sintra to Menomonie (Wisconsin) | 4,080.89 mi (6,567.56 km) |
| Sintra to Mentor (Ohio) | 3,685.32 mi (5,930.95 km) |
| Sintra to Mequon (Wisconsin) | 3,953.19 mi (6,362.05 km) |
| Sintra to Merced (California) | 5,595.49 mi (9,005.08 km) |
| Sintra to Mercedes (Texas) | 5,036.24 mi (8,105.05 km) |
| Sintra to Mercer Island (Washington) | 5,184.07 mi (8,342.95 km) |
| Sintra to Mercerville (New Jersey) | 3,399.94 mi (5,471.67 km) |
| Sintra to Meriden (Connecticut) | 3,276.27 mi (5,272.65 km) |
| Sintra to Meridian (Idaho) | 5,147.87 mi (8,284.69 km) |
| Sintra to Meridian (Mississippi) | 4,336.01 mi (6,978.14 km) |
| Sintra to Merriam (Kansas) | 4,396.93 mi (7,076.18 km) |
