| Ontario to Maricopa (Arizona) | 330.05 mi (531.16 km) |
| Ontario to Marietta (Georgia) | 1,885.64 mi (3,034.65 km) |
| Ontario to Marietta (Ohio) | 2,022.69 mi (3,255.20 km) |
| Ontario to Marina (California) | 298.05 mi (479.66 km) |
| Ontario to Marinette (Wisconsin) | 1,756.00 mi (2,826.00 km) |
| Ontario to Marion (Arkansas) | 1,555.11 mi (2,502.70 km) |
| Ontario to Marion (Illinois) | 1,618.28 mi (2,604.36 km) |
| Ontario to Marion (Indiana) | 1,801.88 mi (2,899.84 km) |
| Ontario to Marion (Iowa) | 1,512.75 mi (2,434.53 km) |
| Ontario to Marion (Ohio) | 1,935.03 mi (3,114.12 km) |
| Ontario to Marion Oaks (Florida) | 2,103.91 mi (3,385.92 km) |
| Ontario to Markham (Illinois) | 1,704.40 mi (2,742.97 km) |
| Ontario to Marlborough (Massachusetts) | 2,533.94 mi (4,077.98 km) |
| Ontario to Marlton (New Jersey) | 2,367.58 mi (3,810.25 km) |
| Ontario to Marquette (Michigan) | 1,795.19 mi (2,889.07 km) |
