| Ontario to Darby (Pennsylvania) | 2,349.95 mi (3,781.89 km) |
| Ontario to Dardenne Prairie (Missouri) | 1,523.86 mi (2,452.42 km) |
| Ontario to Darien (Illinois) | 1,690.95 mi (2,721.32 km) |
| Ontario to Davenport (Iowa) | 1,555.26 mi (2,502.96 km) |
| Ontario to Davidson (North Carolina) | 2,078.11 mi (3,344.40 km) |
| Ontario to Davie (Florida) | 2,285.06 mi (3,677.45 km) |
| Ontario to Davis (California) | 387.54 mi (623.69 km) |
| Ontario to Dayton (Nevada) | 376.62 mi (606.12 km) |
| Ontario to Dayton (Ohio) | 1,876.24 mi (3,019.51 km) |
| Ontario to Daytona Beach (Florida) | 2,162.37 mi (3,479.99 km) |
| Ontario to De Pere (Wisconsin) | 1,723.27 mi (2,773.34 km) |
| Ontario to De Witt (New York) | 2,303.21 mi (3,706.66 km) |
| Ontario to Dearborn (Michigan) | 1,938.66 mi (3,119.98 km) |
| Ontario to Dearborn Heights (Michigan) | 1,935.44 mi (3,114.79 km) |
| Ontario to DeBary (Florida) | 2,156.45 mi (3,470.48 km) |
