Moderator: Hawaii-based airlines & Hawai'i forums
Join Date: Mar 2003
Location: Ka ʻĀpala Nui, Nuioka
Programs: NEXUS/Global Entry, Delta, United, Hyatt, IHG, Marriott, and Hertz
Posts: 18,032
It's possible to walk from the main terminal gates to the inter-island ones while remaining behind security. It would be about a 10 minute walk from the CO gates.
slippahs' thread in the sticky gives pretty detailed instructions on how to do this.