| Ontario to River Ridge (Louisiana) | 1,624.24 mi (2,613.97 km) |
| Ontario to Riverbank (California) | 315.83 mi (508.27 km) |
| Ontario to Riverdale (Georgia) | 1,897.77 mi (3,054.17 km) |
| Ontario to Riverdale (Illinois) | 1,707.58 mi (2,748.09 km) |
| Ontario to Riverside (California) | 13.99 mi (22.51 km) |
| Ontario to Riverside (Ohio) | 1,880.40 mi (3,026.22 km) |
| Ontario to Riverton (Utah) | 544.32 mi (876.00 km) |
| Ontario to Riverton (Wyoming) | 794.99 mi (1,279.42 km) |
| Ontario to Riverview (Florida) | 2,125.10 mi (3,420.02 km) |
| Ontario to Riverview (Michigan) | 1,938.67 mi (3,119.99 km) |
| Ontario to Riviera Beach (Florida) | 2,278.68 mi (3,667.18 km) |
| Ontario to Riviera Beach (Maryland) | 2,286.32 mi (3,679.48 km) |
| Ontario to Roanoke (Virginia) | 2,111.41 mi (3,397.99 km) |
| Ontario to Roanoke Rapids (North Carolina) | 2,244.85 mi (3,612.73 km) |
| Ontario to Robbinsdale (Minnesota) | 1,491.15 mi (2,399.77 km) |
