| Ottawa to River Ridge (Louisiana) | 791.25 mi (1,273.39 km) |
| Ottawa to Riverbank (California) | 1,719.56 mi (2,767.37 km) |
| Ottawa to Riverdale (Georgia) | 590.09 mi (949.66 km) |
| Ottawa to Riverdale (Illinois) | 64.70 mi (104.13 km) |
| Ottawa to Riverside (California) | 1,636.08 mi (2,633.01 km) |
| Ottawa to Riverside (Ohio) | 269.68 mi (434.01 km) |
| Ottawa to Riverton (Utah) | 1,205.48 mi (1,940.03 km) |
| Ottawa to Riverton (Wyoming) | 1,007.06 mi (1,620.71 km) |
| Ottawa to Riverview (Florida) | 1,005.17 mi (1,617.66 km) |
| Ottawa to Riverview (Michigan) | 295.60 mi (475.73 km) |
| Ottawa to Riviera Beach (Florida) | 1,123.19 mi (1,807.60 km) |
| Ottawa to Riviera Beach (Maryland) | 665.41 mi (1,070.87 km) |
| Ottawa to Roanoke (Virginia) | 550.99 mi (886.73 km) |
| Ottawa to Roanoke Rapids (North Carolina) | 689.35 mi (1,109.40 km) |
| Ottawa to Robbinsdale (Minnesota) | 340.28 mi (547.63 km) |
