| Ontario to Allison Park (Pennsylvania) | 2,100.88 mi (3,381.03 km) |
| Ontario to Allouez (Wisconsin) | 1,726.50 mi (2,778.53 km) |
| Ontario to Aloha (Oregon) | 838.78 mi (1,349.89 km) |
| Ontario to Alpena (Michigan) | 1,955.03 mi (3,146.31 km) |
| Ontario to Alpharetta (Georgia) | 1,899.46 mi (3,056.89 km) |
| Ontario to Alpine (California) | 95.98 mi (154.46 km) |
| Ontario to Alpine (Utah) | 547.36 mi (880.89 km) |
| Ontario to Alsip (Illinois) | 1,702.72 mi (2,740.26 km) |
| Ontario to Altadena (California) | 32.02 mi (51.53 km) |
| Ontario to Altamont (Oregon) | 606.33 mi (975.80 km) |
| Ontario to Altamonte Springs (Florida) | 2,157.33 mi (3,471.88 km) |
| Ontario to Alton (Illinois) | 1,555.70 mi (2,503.66 km) |
| Ontario to Alton (Texas) | 1,268.19 mi (2,040.95 km) |
| Ontario to Altoona (Iowa) | 1,411.60 mi (2,271.75 km) |
| Ontario to Altoona (Pennsylvania) | 2,182.79 mi (3,512.87 km) |
