| Ottawa to Reidsville (North Carolina) | 601.81 mi (968.51 km) |
| Ottawa to Reisterstown (Maryland) | 644.92 mi (1,037.90 km) |
| Ottawa to Rendon (Texas) | 762.84 mi (1,227.68 km) |
| Ottawa to Reno (Nevada) | 1,627.08 mi (2,618.54 km) |
| Ottawa to Renton (Washington) | 1,685.94 mi (2,713.26 km) |
| Ottawa to Republic (Missouri) | 381.57 mi (614.07 km) |
| Ottawa to Reston (Virginia) | 628.09 mi (1,010.82 km) |
| Ottawa to Revere (Massachusetts) | 917.96 mi (1,477.32 km) |
| Ottawa to Rexburg (Idaho) | 1,176.71 mi (1,893.74 km) |
| Ottawa to Reynoldsburg (Ohio) | 330.48 mi (531.85 km) |
| Ottawa to Rialto (California) | 1,630.26 mi (2,623.65 km) |
| Ottawa to Richardson (Texas) | 723.14 mi (1,163.79 km) |
| Ottawa to Richfield (Minnesota) | 331.11 mi (532.87 km) |
| Ottawa to Richfield (Wisconsin) | 133.40 mi (214.69 km) |
| Ottawa to Richland (Washington) | 1,546.38 mi (2,488.66 km) |
