| Duncan to The Villages (Florida) | 1,012.65 mi (1,629.70 km) |
| Duncan to The Woodlands (Texas) | 332.83 mi (535.63 km) |
| Duncan to Thibodaux (Louisiana) | 529.17 mi (851.62 km) |
| Duncan to Thomasville (Georgia) | 849.31 mi (1,366.83 km) |
| Duncan to Thomasville (North Carolina) | 1,009.98 mi (1,625.40 km) |
| Duncan to Thonotosassa (Florida) | 1,024.52 mi (1,648.80 km) |
| Duncan to Thornton (Colorado) | 535.72 mi (862.15 km) |
| Duncan to Thousand Oaks (California) | 1,193.17 mi (1,920.23 km) |
| Duncan to Three Lakes (Florida) | 1,211.88 mi (1,950.33 km) |
| Duncan to Tiffin (Ohio) | 922.08 mi (1,483.95 km) |
| Duncan to Tifton (Georgia) | 860.31 mi (1,384.53 km) |
| Duncan to Tigard (Oregon) | 1,506.82 mi (2,424.99 km) |
| Duncan to Tillmans Corner (Alabama) | 627.66 mi (1,010.12 km) |
| Duncan to Timberlake (Virginia) | 1,060.37 mi (1,706.49 km) |
| Duncan to Timberlane (Louisiana) | 562.36 mi (905.04 km) |
