The easiest way is to take your firearm with you as checked luggage when flying to Hawaii.
As far as I know, Hawaii does not prohibit this. Also
as far as I know, shipping your own firearm to Hawaii will require you to ship it to an FFL in Hawaii and then obtain a
Permit to Acquire to do the transfer back to you.
Inform yourself about the applicable laws in Hawaii! Realize that Hawaii has a
firearm registration and is a very unfriendly territory for gun owners. You must register the firearm within five days after the firearm enters the state.
Consult a
2A friendly lawyer in Hawaii.