| Ontario to Missouri City (Texas) | 1,329.48 mi (2,139.60 km) |
| Ontario to Mitchell (South Dakota) | 1,242.71 mi (1,999.94 km) |
| Ontario to Mitchellville (Maryland) | 2,272.02 mi (3,656.47 km) |
| Ontario to Moberly (Missouri) | 1,437.28 mi (2,313.08 km) |
| Ontario to Mobile (Alabama) | 1,730.73 mi (2,785.34 km) |
| Ontario to Modesto (California) | 312.99 mi (503.71 km) |
| Ontario to Mokena (Illinois) | 1,694.15 mi (2,726.47 km) |
| Ontario to Moline (Illinois) | 1,560.09 mi (2,510.72 km) |
| Ontario to Moncks Corner (South Carolina) | 2,152.00 mi (3,463.31 km) |
| Ontario to Monfort Heights (Ohio) | 1,853.72 mi (2,983.28 km) |
| Ontario to Monmouth (Oregon) | 804.44 mi (1,294.62 km) |
| Ontario to Monroe (Georgia) | 1,934.16 mi (3,112.73 km) |
| Ontario to Monroe (Louisiana) | 1,474.55 mi (2,373.06 km) |
| Ontario to Monroe (Michigan) | 1,927.33 mi (3,101.74 km) |
| Ontario to Monroe (North Carolina) | 2,097.81 mi (3,376.10 km) |
