| Ontario to Tulare (California) | 178.53 mi (287.32 km) |
| Ontario to Tullahoma (Tennessee) | 1,777.85 mi (2,861.17 km) |
| Ontario to Tulsa (Oklahoma) | 1,232.90 mi (1,984.17 km) |
| Ontario to Tumwater (Washington) | 936.65 mi (1,507.39 km) |
| Ontario to Tupelo (Mississippi) | 1,645.43 mi (2,648.07 km) |
| Ontario to Turlock (California) | 300.94 mi (484.31 km) |
| Ontario to Tuscaloosa (Alabama) | 1,724.97 mi (2,776.07 km) |
| Ontario to Tustin (California) | 24.31 mi (39.12 km) |
| Ontario to Twentynine Palms (California) | 88.46 mi (142.36 km) |
| Ontario to Twin Falls (Idaho) | 613.09 mi (986.68 km) |
| Ontario to Twin Rivers (New Jersey) | 2,389.01 mi (3,844.75 km) |
| Ontario to Twinsburg (Ohio) | 2,024.61 mi (3,258.30 km) |
| Ontario to Two Rivers (Wisconsin) | 1,742.55 mi (2,804.36 km) |
| Ontario to Tyler (Texas) | 1,292.50 mi (2,080.08 km) |
| Ontario to Tysons (Virginia) | 2,249.97 mi (3,620.98 km) |
