If you're connecting in HNL thru to Maui, the bags'll go for no additional charge. You'll pay the fee(s) each and every time you check in for a Haw'n flight. If you are just transitting HNL, you can buy AA ticket and then the cheaper (ie non-AA codeshare) HA flight seperately. When you check in on mainland, you'll have to get an agent to tag the bags onto the connecting (and seperately ticketed) HA flight. Just show him/her the other itiniery. If you are saying in Honolulu...nevermind....