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: 18,659
In general, airline reservation systems only allow a PNR (reservation) to be split into two but never merged into one. I suspect Hawaiian is no different.