| Ontario to Malvern (Arkansas) | 1,412.95 mi (2,273.93 km) |
| Ontario to Manassas (Virginia) | 2,237.09 mi (3,600.24 km) |
| Ontario to Manassas Park (Virginia) | 2,239.17 mi (3,603.59 km) |
| Ontario to Manatí (Puerto Rico) | 3,309.86 mi (5,326.70 km) |
| Ontario to Manchester (Missouri) | 1,535.23 mi (2,470.71 km) |
| Ontario to Manchester (New Hampshire) | 2,537.49 mi (4,083.69 km) |
| Ontario to Manchester (Tennessee) | 1,785.00 mi (2,872.69 km) |
| Ontario to Manchester (Virginia) | 2,242.02 mi (3,608.19 km) |
| Ontario to Mandan (North Dakota) | 1,241.56 mi (1,998.10 km) |
| Ontario to Mandeville (Louisiana) | 1,623.43 mi (2,612.65 km) |
| Ontario to Mango (Florida) | 2,120.77 mi (3,413.05 km) |
| Ontario to Manhattan (Kansas) | 1,214.63 mi (1,954.75 km) |
| Ontario to Manhattan (New York) | 2,414.41 mi (3,885.62 km) |
| Ontario to Manhattan Beach (California) | 46.46 mi (74.77 km) |
| Ontario to Manitowoc (Wisconsin) | 1,736.87 mi (2,795.22 km) |
