| Sintra to Manerbio | 1,095.38 mi (1,762.85 km) |
| Sintra to Manfredonia | 1,344.44 mi (2,163.67 km) |
| Sintra to Maniago | 1,230.62 mi (1,980.50 km) |
| Sintra to Mantova | 1,121.82 mi (1,805.40 km) |
| Sintra to Maranello | 1,114.36 mi (1,793.40 km) |
| Sintra to Marano di Napoli | 1,254.91 mi (2,019.58 km) |
| Sintra to Marano Vicentino | 1,162.30 mi (1,870.53 km) |
| Sintra to Marcianise | 1,260.85 mi (2,029.14 km) |
| Sintra to Marcon | 1,199.75 mi (1,930.81 km) |
| Sintra to Mareno di Piave | 1,207.52 mi (1,943.31 km) |
| Sintra to Margherita di Savoia | 1,356.67 mi (2,183.35 km) |
| Sintra to Mariano Comense | 1,059.31 mi (1,704.80 km) |
| Sintra to Marigliano | 1,268.78 mi (2,041.91 km) |
| Sintra to Marino | 1,177.05 mi (1,894.28 km) |
| Sintra to Marostica | 1,173.46 mi (1,888.50 km) |
