| Ontario to Red Bank (New Jersey) | 2,410.95 mi (3,880.06 km) |
| Ontario to Red Bank (Tennessee) | 1,831.56 mi (2,947.60 km) |
| Ontario to Red Bluff (California) | 494.65 mi (796.06 km) |
| Ontario to Red Hill (South Carolina) | 2,199.81 mi (3,540.25 km) |
| Ontario to Red Oak (Texas) | 1,205.07 mi (1,939.37 km) |
| Ontario to Red Wing (Minnesota) | 1,513.43 mi (2,435.62 km) |
| Ontario to Redan (Georgia) | 1,909.53 mi (3,073.10 km) |
| Ontario to Redding (California) | 521.32 mi (838.98 km) |
| Ontario to Redland (Maryland) | 2,253.28 mi (3,626.30 km) |
| Ontario to Redlands (California) | 24.93 mi (40.12 km) |
| Ontario to Redmond (Oregon) | 731.57 mi (1,177.35 km) |
| Ontario to Redmond (Washington) | 970.81 mi (1,562.38 km) |
| Ontario to Redondo Beach (California) | 45.89 mi (73.85 km) |
| Ontario to Redwood City (California) | 352.48 mi (567.25 km) |
| Ontario to Reedley (California) | 205.03 mi (329.97 km) |
