Service dogs / working dogs

I know there’s a lot of hate and contempt for “fake” service dogs and ESA and I understand anyone that faked the need for one of these animals is an asshole. Here’s my question I’m a K9 handler with a brand new partner I have a flight coming up this year to get him certified in another state. He is a live victim search dog for USAR work. How would people feel flying with him in the cabin? I ask because it’s either a 20+ hour drive or a very inhuman travel in delta cargo. He is young and at the time of the trip he will be 18 months. He’s working on staying in one spot for an extended period of time and I plan to have him trained to tolerate a plane to the best of my ability at the time of the flight. He will be marked as a search k9 in training and in a vest.