Go to the HHonors website by doing a search of "Hilton Honors" in a search engine. On the website, Click on "Points" in the menu bar at the top of the page.
On the Hilton HHonors Points & Miles page, select "Exchange Points or Miles." In the drop-down menu that comes up select "Miles for Points."
Using the provided list of partnered airlines and their contact information. Contact your airline's frequent flier miles program to let them know you would like to transfer your airline miles to HHonors points. Have your frequent flier account information and your HHonors information ready so your request can be processed quickly.
Check your HHonors account. When everything has been processed, the double points will show up in your account page for HHonors, unless you transferred points for Virgin Atlantic, in which case the points are not doubled, and you get 5,000 points for 5,000 miles.