| population | |
| Province of Ilocos Norte | 609588 |
| Province of Ilocos Sur | 706009 |
| population | |
| Province of La Union | 822352 |
| Province of Pangasinan | 3163190 |
 | San Fernando Airport | ~ 48.55 km |
| Loakan Airport | ~ 68.00 km |
| Cauayan Airport | ~ 131.17 km |
| Laoag International Airport | ~ 133.10 km |
| Tuguegarao Airport | ~ 148.38 km |
| Dr Juan C Angara Airport | ~ 173.87 km |
| Casiguran Airport | ~ 186.29 km |
| Cagayan North International Airport | ~ 186.44 km |
| Dilasag Airport | ~ 189.09 km |
