| Porsgrunn to Arcozelo | 1,478.65 mi (2,379.66 km) |
| Porsgrunn to Arganil | 1,517.65 mi (2,442.42 km) |
| Porsgrunn to Arouca | 1,477.19 mi (2,377.30 km) |
| Porsgrunn to Arruda dos Vinhos | 1,617.67 mi (2,603.40 km) |
| Porsgrunn to Aveiro | 1,505.10 mi (2,422.22 km) |
| Porsgrunn to Aver-o-Mar | 1,460.13 mi (2,349.85 km) |
| Porsgrunn to Aves | 1,447.02 mi (2,328.75 km) |
| Porsgrunn to Azambuja | 1,607.98 mi (2,587.79 km) |
| Porsgrunn to Baiao | 1,457.90 mi (2,346.27 km) |
| Porsgrunn to Barcelos | 1,449.61 mi (2,332.93 km) |
| Porsgrunn to Barreiro | 1,637.59 mi (2,635.45 km) |
| Porsgrunn to Batalha | 1,569.87 mi (2,526.47 km) |
| Porsgrunn to Beja | 1,652.31 mi (2,659.14 km) |
| Porsgrunn to Belas | 1,635.32 mi (2,631.80 km) |
| Porsgrunn to Benavente | 1,612.79 mi (2,595.54 km) |
