| Portsmouth to Tacoma (Washington) | 4,820.87 mi (7,758.44 km) |
| Portsmouth to Tahlequah (Oklahoma) | 4,503.17 mi (7,247.15 km) |
| Portsmouth to Takoma Park (Maryland) | 3,635.81 mi (5,851.27 km) |
| Portsmouth to Talladega (Alabama) | 4,268.56 mi (6,869.59 km) |
| Portsmouth to Tallahassee (Florida) | 4,336.60 mi (6,979.08 km) |
| Portsmouth to Tallmadge (Ohio) | 3,722.90 mi (5,991.43 km) |
| Portsmouth to Tamalpais-Homestead Valley (California) | 5,358.15 mi (8,623.12 km) |
| Portsmouth to Tamarac (Florida) | 4,375.88 mi (7,042.29 km) |
| Portsmouth to Tamiami (Florida) | 4,404.64 mi (7,088.58 km) |
| Portsmouth to Tampa (Florida) | 4,381.09 mi (7,050.68 km) |
| Portsmouth to Tanaina (Alaska) | 4,473.02 mi (7,198.64 km) |
| Portsmouth to Tanque Verde (Arizona) | 5,283.28 mi (8,502.61 km) |
| Portsmouth to Tarboro (North Carolina) | 3,796.84 mi (6,110.42 km) |
| Portsmouth to Tarpon Springs (Florida) | 4,386.96 mi (7,060.14 km) |
| Portsmouth to Tarrytown (New York) | 3,416.38 mi (5,498.13 km) |
