Formal:
* Aloha kakahiaka: This literally means "good morning" but is used as a formal farewell.
* Aloha auinala: This means "good afternoon" and is also used as a formal farewell.
* Aloha ahiahi: This means "good evening" and is also used as a formal farewell.
Informal:
* Aloha: This is the most common way to say "hello" and "goodbye" in Hawaiian. It can be used in both formal and informal situations.
* A hui hou: This means "until we meet again" and is a more intimate way to say goodbye.
Other Options:
* Mahalo: This means "thank you" but can also be used as a farewell, especially after a pleasant interaction.
* E komo mai: This means "come in" but can also be used as a farewell, implying that you would like to see the person again.
The best way to say goodbye in Hawaiian depends on your relationship with the person and the situation.