Informal:
* Aloha: This is the most common way to say hello and goodbye in Hawaiian. It literally means "love" or "affection" and is a versatile word for various greetings and farewells.
* A hui hou: This means "until we meet again" and is a slightly more formal way to say goodbye than just "aloha."
* E komo mai: This means "come in" and is used as a farewell when someone is leaving your presence.
Formal:
* Mahalo nui loa: This means "thank you very much" and can be used as a formal goodbye.
* E ʻoluʻolu e hoʻomaikaʻi iā ʻoe: This means "please take care of yourself" and is a very formal way to say goodbye.
Ultimately, the best way to say goodbye in Hawaiian depends on your relationship with the person you're saying goodbye to and the context of the situation.