A friend did not bring her Bengal cat with her when she moved to Hawaii. I don't remember if it was breed prejudice or that the quarantine period was inhumane.I don't know about in cabin flying with animals.. Am curious from long ago past understanding about military members being stationed in Hawaii and bringing their pets. Their pets had to actually go through a long facility containment period. Is it different now?
The length of the flight is concerning for me. I have a small terrier mix (not a Service dog or ESA) who can use pee pads, but she is a dog; I can't see putting her in a crate for that amount of time and only giving her a human bathroom-break sized bathroom break. For that matter, it's an awfully long time to confine an emotionally fragile human in a small space with a bunch of strangers.
There is nothing like a dog and a road trip but a petsitter or kennel is more humane if you can't avoid airline travel. I'm not sure who "we" implies, but you may need to stand up for Butters and/or yourself if somebody else is forcing an inappropriate situation. You are worth more than that.