| Porsgrunn to Troy (Michigan) | 3,856.45 mi (6,206.35 km) |
| Porsgrunn to Troy (Missouri) | 4,300.33 mi (6,920.71 km) |
| Porsgrunn to Troy (New York) | 3,541.55 mi (5,699.58 km) |
| Porsgrunn to Troy (Ohio) | 4,029.30 mi (6,484.54 km) |
| Porsgrunn to Truckee (California) | 5,055.71 mi (8,136.38 km) |
| Porsgrunn to Trujillo Alto (Puerto Rico) | 4,630.28 mi (7,451.71 km) |
| Porsgrunn to Trumbull Center (Connecticut) | 3,603.66 mi (5,799.53 km) |
| Porsgrunn to Trussville (Alabama) | 4,464.91 mi (7,185.58 km) |
| Porsgrunn to Tualatin (Oregon) | 4,729.49 mi (7,611.38 km) |
| Porsgrunn to Tuckahoe (Virginia) | 3,947.58 mi (6,353.02 km) |
| Porsgrunn to Tucker (Georgia) | 4,375.60 mi (7,041.85 km) |
| Porsgrunn to Tucson (Arizona) | 5,276.90 mi (8,492.35 km) |
| Porsgrunn to Tucson Estates (Arizona) | 5,281.94 mi (8,500.45 km) |
| Porsgrunn to Tucson Mountains (Arizona) | 5,274.29 mi (8,488.14 km) |
| Porsgrunn to Tukwila (Washington) | 4,587.56 mi (7,382.96 km) |
