| Ottawa to Morris (Illinois) | 20.56 mi (33.09 km) |
| Ottawa to Morristown (New Jersey) | 747.51 mi (1,203.00 km) |
| Ottawa to Morristown (Tennessee) | 463.75 mi (746.33 km) |
| Ottawa to Morrisville (North Carolina) | 659.96 mi (1,062.11 km) |
| Ottawa to Morro Bay (California) | 1,772.65 mi (2,852.80 km) |
| Ottawa to Morton (Illinois) | 61.20 mi (98.49 km) |
| Ottawa to Morton Grove (Illinois) | 71.51 mi (115.09 km) |
| Ottawa to Moscow (Idaho) | 1,439.10 mi (2,316.01 km) |
| Ottawa to Moses Lake (Washington) | 1,548.27 mi (2,491.69 km) |
| Ottawa to Moss Bluff (Louisiana) | 801.72 mi (1,290.25 km) |
| Ottawa to Moss Point (Mississippi) | 755.47 mi (1,215.81 km) |
| Ottawa to Moultrie (Georgia) | 758.35 mi (1,220.44 km) |
| Ottawa to Mounds View (Minnesota) | 340.24 mi (547.57 km) |
| Ottawa to Mount Airy (North Carolina) | 553.56 mi (890.87 km) |
| Ottawa to Mount Clemens (Michigan) | 317.07 mi (510.28 km) |
