| Duncan to Tacoma (Washington) | 1,542.48 mi (2,482.38 km) |
| Duncan to Tahlequah (Oklahoma) | 191.26 mi (307.80 km) |
| Duncan to Takoma Park (Maryland) | 1,194.88 mi (1,922.97 km) |
| Duncan to Talladega (Alabama) | 681.24 mi (1,096.35 km) |
| Duncan to Tallahassee (Florida) | 844.21 mi (1,358.63 km) |
| Duncan to Tallmadge (Ohio) | 1,005.93 mi (1,618.89 km) |
| Duncan to Tamalpais-Homestead Valley (California) | 1,387.42 mi (2,232.83 km) |
| Duncan to Tamarac (Florida) | 1,197.74 mi (1,927.58 km) |
| Duncan to Tamiami (Florida) | 1,207.34 mi (1,943.02 km) |
| Duncan to Tampa (Florida) | 1,018.20 mi (1,638.63 km) |
| Duncan to Tanaina (Alaska) | 2,906.11 mi (4,676.93 km) |
| Duncan to Tanque Verde (Arizona) | 755.48 mi (1,215.83 km) |
| Duncan to Tarboro (North Carolina) | 1,151.25 mi (1,852.76 km) |
| Duncan to Tarpon Springs (Florida) | 996.08 mi (1,603.04 km) |
| Duncan to Tarrytown (New York) | 1,383.04 mi (2,225.78 km) |
