| Ottawa to Red Bank (New Jersey) | 773.53 mi (1,244.87 km) |
| Ottawa to Red Bank (Tennessee) | 471.91 mi (759.47 km) |
| Ottawa to Red Bluff (California) | 1,739.72 mi (2,799.81 km) |
| Ottawa to Red Hill (South Carolina) | 749.43 mi (1,206.08 km) |
| Ottawa to Red Oak (Texas) | 751.46 mi (1,209.36 km) |
| Ottawa to Red Wing (Minnesota) | 293.46 mi (472.28 km) |
| Ottawa to Redan (Georgia) | 584.67 mi (940.94 km) |
| Ottawa to Redding (California) | 1,739.76 mi (2,799.88 km) |
| Ottawa to Redland (Maryland) | 634.26 mi (1,020.74 km) |
| Ottawa to Redlands (California) | 1,621.12 mi (2,608.94 km) |
| Ottawa to Redmond (Oregon) | 1,641.51 mi (2,641.76 km) |
| Ottawa to Redmond (Washington) | 1,683.02 mi (2,708.57 km) |
| Ottawa to Redondo Beach (California) | 1,688.90 mi (2,718.03 km) |
| Ottawa to Redwood City (California) | 1,790.97 mi (2,882.28 km) |
| Ottawa to Reedley (California) | 1,668.16 mi (2,684.65 km) |
