| Portsmouth to Town and Country (Missouri) | 4,195.30 mi (6,751.69 km) |
| Portsmouth to Towson (Maryland) | 3,601.80 mi (5,796.54 km) |
| Portsmouth to Tracy (California) | 5,333.97 mi (8,584.19 km) |
| Portsmouth to Traverse City (Michigan) | 3,727.32 mi (5,998.54 km) |
| Portsmouth to Travilah (Maryland) | 3,642.57 mi (5,862.16 km) |
| Portsmouth to Trenton (Michigan) | 3,747.86 mi (6,031.60 km) |
| Portsmouth to Trenton (New Jersey) | 3,489.14 mi (5,615.23 km) |
| Portsmouth to Trenton (Ohio) | 3,917.58 mi (6,304.73 km) |
| Portsmouth to Triangle (Virginia) | 3,668.03 mi (5,903.12 km) |
| Portsmouth to Trinity (Florida) | 4,380.97 mi (7,050.49 km) |
| Portsmouth to Trophy Club (Texas) | 4,735.86 mi (7,621.63 km) |
| Portsmouth to Trotwood (Ohio) | 3,897.49 mi (6,272.40 km) |
| Portsmouth to Troutdale (Oregon) | 4,915.92 mi (7,911.40 km) |
| Portsmouth to Troy (Alabama) | 4,342.36 mi (6,988.35 km) |
| Portsmouth to Troy (Illinois) | 4,168.03 mi (6,707.79 km) |
