| Porsgrunn to Todi | 1,134.65 mi (1,826.04 km) |
| Porsgrunn to Tolentino | 1,109.53 mi (1,785.61 km) |
| Porsgrunn to Tolmezzo | 889.10 mi (1,430.87 km) |
| Porsgrunn to Torre Annunziata | 1,285.03 mi (2,068.06 km) |
| Porsgrunn to Torre Boldone | 925.77 mi (1,489.89 km) |
| Porsgrunn to Torre del Greco | 1,282.75 mi (2,064.38 km) |
| Porsgrunn to Torre Maggiore | 1,228.18 mi (1,976.56 km) |
| Porsgrunn to Torre Santa Susanna | 1,335.03 mi (2,148.52 km) |
| Porsgrunn to Torri di Quartesolo | 942.94 mi (1,517.52 km) |
| Porsgrunn to Tortoli | 1,325.37 mi (2,132.98 km) |
| Porsgrunn to Tortona | 983.24 mi (1,582.37 km) |
| Porsgrunn to Tortoreto | 1,141.51 mi (1,837.08 km) |
| Porsgrunn to Tradate | 927.51 mi (1,492.69 km) |
| Porsgrunn to Trani | 1,266.90 mi (2,038.87 km) |
| Porsgrunn to Trapani | 1,463.06 mi (2,354.56 km) |
