| Ottawa to Marrero (Louisiana) | 795.65 mi (1,280.47 km) |
| Ottawa to Marshall (Minnesota) | 411.96 mi (662.99 km) |
| Ottawa to Marshall (Missouri) | 277.83 mi (447.12 km) |
| Ottawa to Marshall (Texas) | 681.04 mi (1,096.03 km) |
| Ottawa to Marshalltown (Iowa) | 215.67 mi (347.08 km) |
| Ottawa to Marshfield (Wisconsin) | 238.41 mi (383.68 km) |
| Ottawa to Martha Lake (Washington) | 1,688.97 mi (2,718.14 km) |
| Ottawa to Martin (Tennessee) | 346.64 mi (557.87 km) |
| Ottawa to Martinez (California) | 1,774.40 mi (2,855.63 km) |
| Ottawa to Martinez (Georgia) | 654.68 mi (1,053.60 km) |
| Ottawa to Martinsburg (West Virginia) | 585.19 mi (941.77 km) |
| Ottawa to Martinsville (Indiana) | 183.99 mi (296.11 km) |
| Ottawa to Martinsville (New Jersey) | 744.33 mi (1,197.89 km) |
| Ottawa to Martinsville (Virginia) | 578.92 mi (931.68 km) |
| Ottawa to Maryland City (Maryland) | 652.36 mi (1,049.88 km) |
