I have taken Annie on trips with me before. New York to LA is her longest. She just sleeps in her bag for the most part. But all dogs are different. Some can't handle being in a bag for that long. But Annie is a little trooper
She's been a little traveler since the day she arrived.
I noticed that you said that you were going to Hawaii. Unfortunately Hawaii has quarantine laws on pets. So you probably won't be able to take your puppy with you.