Originally Posted by steve100
What may help us answer this question is understanding why you want to do this? Sometimes not exchanging miles can be better. For example, you mention that you want Hawaiian miles - is this for interisland trips in Hawaii? If so, United is partners with Aloha airlines and you can just use your UA miles and ticket on Aloha.
You mention that you will be flying more often to Hawaii now. Well, United has very good frequent service to Hawaii from the mainland.
I want to exchange to fly from CA to HI. Keep the tips coming. Very much appreciated. skypilot