| Duncan to Town and Country (Missouri) | 500.11 mi (804.84 km) |
| Duncan to Towson (Maryland) | 1,219.57 mi (1,962.71 km) |
| Duncan to Tracy (California) | 1,327.77 mi (2,136.84 km) |
| Duncan to Traverse City (Michigan) | 960.88 mi (1,546.39 km) |
| Duncan to Travilah (Maryland) | 1,182.70 mi (1,903.38 km) |
| Duncan to Trenton (Michigan) | 953.25 mi (1,534.11 km) |
| Duncan to Trenton (New Jersey) | 1,326.18 mi (2,134.28 km) |
| Duncan to Trenton (Ohio) | 816.11 mi (1,313.40 km) |
| Duncan to Triangle (Virginia) | 1,173.90 mi (1,889.21 km) |
| Duncan to Trinity (Florida) | 1,000.48 mi (1,610.12 km) |
| Duncan to Trophy Club (Texas) | 114.19 mi (183.78 km) |
| Duncan to Trotwood (Ohio) | 831.12 mi (1,337.55 km) |
| Duncan to Troutdale (Oregon) | 1,492.19 mi (2,401.44 km) |
| Duncan to Troy (Alabama) | 716.33 mi (1,152.81 km) |
| Duncan to Troy (Illinois) | 530.30 mi (853.44 km) |
