| Ontario to Ashtabula (Ohio) | 2,059.85 mi (3,315.00 km) |
| Ontario to Ashwaubenon (Wisconsin) | 1,723.62 mi (2,773.90 km) |
| Ontario to Aspen Hill (Maryland) | 2,256.89 mi (3,632.11 km) |
| Ontario to Astoria (Oregon) | 900.16 mi (1,448.67 km) |
| Ontario to Atascadero (California) | 201.23 mi (323.85 km) |
| Ontario to Atascocita (Texas) | 1,339.79 mi (2,156.18 km) |
| Ontario to Atchison (Kansas) | 1,296.39 mi (2,086.33 km) |
| Ontario to Athens (Alabama) | 1,741.40 mi (2,802.52 km) |
| Ontario to Athens (Georgia) | 1,951.94 mi (3,141.35 km) |
| Ontario to Athens (Ohio) | 1,987.95 mi (3,199.29 km) |
| Ontario to Athens (Tennessee) | 1,867.43 mi (3,005.33 km) |
| Ontario to Athens (Texas) | 1,263.97 mi (2,034.16 km) |
| Ontario to Atlanta (Georgia) | 1,894.68 mi (3,049.19 km) |
| Ontario to Atlantic Beach (Florida) | 2,120.78 mi (3,413.07 km) |
| Ontario to Atlantic City (New Jersey) | 2,395.66 mi (3,855.44 km) |
