If you booked the HA segment through Delta (one PNR) Delta is the originating carrier and you should not be charged. However, plan on paying for your bag. I have been on this route many times and can tell you that HA is very aggressive at collecting bag fees. Also, as stated above, make sure your bags are under 50 lbs. If you booked 2 tickets (ATL-HNL on Delta and HNL-KOA on HA) HA will not send your bags through. You will have to get them in HNL.