| Porsgrunn to Tacoma (Washington) | 4,605.64 mi (7,412.06 km) |
| Porsgrunn to Tahlequah (Oklahoma) | 4,598.12 mi (7,399.97 km) |
| Porsgrunn to Takoma Park (Maryland) | 3,852.24 mi (6,199.58 km) |
| Porsgrunn to Talladega (Alabama) | 4,461.00 mi (7,179.29 km) |
| Porsgrunn to Tallahassee (Florida) | 4,570.22 mi (7,355.06 km) |
| Porsgrunn to Tallmadge (Ohio) | 3,881.83 mi (6,247.21 km) |
| Porsgrunn to Tamalpais-Homestead Valley (California) | 5,199.55 mi (8,367.87 km) |
| Porsgrunn to Tamarac (Florida) | 4,678.42 mi (7,529.19 km) |
| Porsgrunn to Tamiami (Florida) | 4,709.39 mi (7,579.03 km) |
| Porsgrunn to Tampa (Florida) | 4,650.48 mi (7,484.23 km) |
| Porsgrunn to Tanaina (Alaska) | 4,018.14 mi (6,466.57 km) |
| Porsgrunn to Tanque Verde (Arizona) | 5,266.26 mi (8,475.22 km) |
| Porsgrunn to Tarboro (North Carolina) | 4,039.10 mi (6,500.31 km) |
| Porsgrunn to Tarpon Springs (Florida) | 4,652.35 mi (7,487.24 km) |
| Porsgrunn to Tarrytown (New York) | 3,635.89 mi (5,851.41 km) |
