| Ontario to Monroe (Ohio) | 1,866.86 mi (3,004.42 km) |
| Ontario to Monroe (Washington) | 981.42 mi (1,579.44 km) |
| Ontario to Monroe (Wisconsin) | 1,618.18 mi (2,604.21 km) |
| Ontario to Monroeville (Pennsylvania) | 2,111.38 mi (3,397.93 km) |
| Ontario to Monrovia (California) | 23.71 mi (38.16 km) |
| Ontario to Monsey (New York) | 2,407.91 mi (3,875.15 km) |
| Ontario to Montclair (California) | 5.70 mi (9.18 km) |
| Ontario to Montclair (Virginia) | 2,245.55 mi (3,613.86 km) |
| Ontario to Montebello (California) | 28.93 mi (46.56 km) |
| Ontario to Monterey (California) | 298.57 mi (480.51 km) |
| Ontario to Monterey Park (California) | 30.13 mi (48.50 km) |
| Ontario to Montgomery (Alabama) | 1,808.74 mi (2,910.89 km) |
| Ontario to Montgomery (Illinois) | 1,671.31 mi (2,689.71 km) |
| Ontario to Montgomery (Ohio) | 1,867.78 mi (3,005.91 km) |
| Ontario to Montgomery Village (Maryland) | 2,250.45 mi (3,621.76 km) |
