| Ontario to Morris (Illinois) | 1,664.29 mi (2,678.42 km) |
| Ontario to Morristown (New Jersey) | 2,387.67 mi (3,842.58 km) |
| Ontario to Morristown (Tennessee) | 1,934.47 mi (3,113.23 km) |
| Ontario to Morrisville (North Carolina) | 2,185.21 mi (3,516.76 km) |
| Ontario to Morro Bay (California) | 205.75 mi (331.12 km) |
| Ontario to Morton (Illinois) | 1,603.60 mi (2,580.74 km) |
| Ontario to Morton Grove (Illinois) | 1,703.93 mi (2,742.20 km) |
| Ontario to Moscow (Idaho) | 877.47 mi (1,412.16 km) |
| Ontario to Moses Lake (Washington) | 908.51 mi (1,462.10 km) |
| Ontario to Moss Bluff (Louisiana) | 1,446.66 mi (2,328.17 km) |
| Ontario to Moss Point (Mississippi) | 1,711.88 mi (2,755.00 km) |
| Ontario to Moultrie (Georgia) | 1,970.62 mi (3,171.40 km) |
| Ontario to Mounds View (Minnesota) | 1,498.93 mi (2,412.30 km) |
| Ontario to Mount Airy (North Carolina) | 2,080.77 mi (3,348.67 km) |
| Ontario to Mount Clemens (Michigan) | 1,957.43 mi (3,150.18 km) |
