| Porsgrunn to Amelia | 1,150.42 mi (1,851.41 km) |
| Porsgrunn to Anagni | 1,209.55 mi (1,946.57 km) |
| Porsgrunn to Ancona | 1,082.94 mi (1,742.82 km) |
| Porsgrunn to Andria | 1,269.14 mi (2,042.49 km) |
| Porsgrunn to Angri | 1,287.51 mi (2,072.05 km) |
| Porsgrunn to Anguillara Sabazia | 1,181.93 mi (1,902.14 km) |
| Porsgrunn to Anzio | 1,227.26 mi (1,975.08 km) |
| Porsgrunn to Anzola dell'Emilia | 1,008.51 mi (1,623.04 km) |
| Porsgrunn to Aosta | 929.96 mi (1,496.62 km) |
| Porsgrunn to Apricena | 1,223.78 mi (1,969.48 km) |
| Porsgrunn to Aprilia | 1,217.99 mi (1,960.16 km) |
| Porsgrunn to Aradeo | 1,362.13 mi (2,192.14 km) |
| Porsgrunn to Aragona | 1,510.39 mi (2,430.73 km) |
| Porsgrunn to Arco | 913.25 mi (1,469.74 km) |
| Porsgrunn to Arcola | 1,036.35 mi (1,667.85 km) |
