| Ontario to Mankato (Minnesota) | 1,439.96 mi (2,317.39 km) |
| Ontario to Manor (Texas) | 1,199.39 mi (1,930.23 km) |
| Ontario to Manorville (New York) | 2,475.40 mi (3,983.78 km) |
| Ontario to Mansfield (Ohio) | 1,966.66 mi (3,165.03 km) |
| Ontario to Mansfield (Texas) | 1,185.30 mi (1,907.56 km) |
| Ontario to Manteca (California) | 329.01 mi (529.48 km) |
| Ontario to Manville (New Jersey) | 2,382.74 mi (3,834.65 km) |
| Ontario to Maple Grove (Minnesota) | 1,487.48 mi (2,393.87 km) |
| Ontario to Maple Heights (Ohio) | 2,018.81 mi (3,248.96 km) |
| Ontario to Maple Valley (Washington) | 949.15 mi (1,527.51 km) |
| Ontario to Mapleton (Utah) | 535.43 mi (861.70 km) |
| Ontario to Maplewood (Minnesota) | 1,504.05 mi (2,420.53 km) |
| Ontario to Marana (Arizona) | 388.82 mi (625.74 km) |
| Ontario to Marco Island (Florida) | 2,208.40 mi (3,554.07 km) |
| Ontario to Margate (Florida) | 2,284.85 mi (3,677.11 km) |
