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.
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.