| Duncan to Tulare (California) | 1,209.69 mi (1,946.81 km) |
| Duncan to Tullahoma (Tennessee) | 664.88 mi (1,070.03 km) |
| Duncan to Tulsa (Oklahoma) | 157.98 mi (254.24 km) |
| Duncan to Tumwater (Washington) | 1,554.77 mi (2,502.17 km) |
| Duncan to Tupelo (Mississippi) | 524.03 mi (843.34 km) |
| Duncan to Turlock (California) | 1,294.71 mi (2,083.63 km) |
| Duncan to Tuscaloosa (Alabama) | 602.71 mi (969.97 km) |
| Duncan to Tustin (California) | 1,136.99 mi (1,829.80 km) |
| Duncan to Twentynine Palms (California) | 1,034.06 mi (1,664.16 km) |
| Duncan to Twin Falls (Idaho) | 1,048.85 mi (1,687.96 km) |
| Duncan to Twin Rivers (New Jersey) | 1,340.80 mi (2,157.81 km) |
| Duncan to Twinsburg (Ohio) | 1,010.45 mi (1,626.16 km) |
| Duncan to Two Rivers (Wisconsin) | 862.59 mi (1,388.21 km) |
| Duncan to Tyler (Texas) | 215.20 mi (346.34 km) |
| Duncan to Tysons (Virginia) | 1,182.34 mi (1,902.80 km) |
