| Upper Grand Lagoon to Manerbio | 5,031.01 mi (8,096.63 km) |
| Upper Grand Lagoon to Manfredonia | 5,407.89 mi (8,703.16 km) |
| Upper Grand Lagoon to Maniago | 5,117.76 mi (8,236.23 km) |
| Upper Grand Lagoon to Mantova | 5,066.13 mi (8,153.15 km) |
| Upper Grand Lagoon to Maranello | 5,088.58 mi (8,189.28 km) |
| Upper Grand Lagoon to Marano di Napoli | 5,354.81 mi (8,617.73 km) |
| Upper Grand Lagoon to Marano Vicentino | 5,077.32 mi (8,171.15 km) |
| Upper Grand Lagoon to Marcianise | 5,355.61 mi (8,619.02 km) |
| Upper Grand Lagoon to Marcon | 5,119.21 mi (8,238.57 km) |
| Upper Grand Lagoon to Mareno di Piave | 5,112.45 mi (8,227.69 km) |
| Upper Grand Lagoon to Margherita di Savoia | 5,427.59 mi (8,734.87 km) |
| Upper Grand Lagoon to Mariano Comense | 4,979.59 mi (8,013.88 km) |
| Upper Grand Lagoon to Marigliano | 5,365.82 mi (8,635.45 km) |
| Upper Grand Lagoon to Marino | 5,257.02 mi (8,460.36 km) |
| Upper Grand Lagoon to Marostica | 5,085.48 mi (8,184.29 km) |
