| Ottawa to Maryland Heights (Missouri) | 201.96 mi (325.03 km) |
| Ottawa to Marysville (California) | 1,723.75 mi (2,774.11 km) |
| Ottawa to Marysville (Ohio) | 296.32 mi (476.88 km) |
| Ottawa to Marysville (Washington) | 1,686.34 mi (2,713.90 km) |
| Ottawa to Maryville (Missouri) | 323.47 mi (520.58 km) |
| Ottawa to Maryville (Tennessee) | 467.55 mi (752.44 km) |
| Ottawa to Mason (Ohio) | 275.26 mi (442.98 km) |
| Ottawa to Mason City (Iowa) | 255.65 mi (411.43 km) |
| Ottawa to Massapequa (New York) | 800.94 mi (1,288.99 km) |
| Ottawa to Massapequa Park (New York) | 801.88 mi (1,290.51 km) |
| Ottawa to Massillon (Ohio) | 382.23 mi (615.13 km) |
| Ottawa to Mastic (New York) | 831.82 mi (1,338.69 km) |
| Ottawa to Mastic Beach (New York) | 832.80 mi (1,340.27 km) |
| Ottawa to Matteson (Illinois) | 56.91 mi (91.59 km) |
| Ottawa to Matthews (North Carolina) | 615.60 mi (990.72 km) |
