| Ottawa to Malvern (Arkansas) | 529.17 mi (851.62 km) |
| Ottawa to Manassas (Virginia) | 625.80 mi (1,007.13 km) |
| Ottawa to Manassas Park (Virginia) | 627.32 mi (1,009.58 km) |
| Ottawa to Manatí (Puerto Rico) | 2,060.83 mi (3,316.58 km) |
| Ottawa to Manchester (Missouri) | 211.20 mi (339.90 km) |
| Ottawa to Manchester (New Hampshire) | 895.54 mi (1,441.22 km) |
| Ottawa to Manchester (Tennessee) | 433.41 mi (697.51 km) |
| Ottawa to Manchester (Virginia) | 658.27 mi (1,059.38 km) |
| Ottawa to Mandan (North Dakota) | 706.79 mi (1,137.48 km) |
| Ottawa to Mandeville (Louisiana) | 761.94 mi (1,226.23 km) |
| Ottawa to Mango (Florida) | 994.12 mi (1,599.87 km) |
| Ottawa to Manhattan (Kansas) | 436.35 mi (702.24 km) |
| Ottawa to Manhattan (New York) | 774.12 mi (1,245.82 km) |
| Ottawa to Manhattan Beach (California) | 1,688.96 mi (2,718.12 km) |
| Ottawa to Manitowoc (Wisconsin) | 198.27 mi (319.08 km) |
