My ex DIL flew her dog and her cat in cargo from Budapest to Las Vegas 15 years ago. It was rough on them both, I met them at the airport with food and water in tow, both were super hungry and scared.
Flew my huge Doberman to and from Hawaii, not good, he went a bit nuts judging by the comfort rug we packed in his cage with him. torn to tiny strips.
One HU friend flew her Doberman to HU years ago, rough trip as well.THey were moving back to HU to stay for good otherwise they would of left her in the states.
You can only take one pet per person onboard but they must be in a carrier that fits under the the seat, they are not allowed to be removed from the carrier while in flight.
That's the news I was told years ago and judging by how horrible the airlines treat us humans, I doubt they are kinder to pets.
I have a German friend in the US who actually traveles allot between Kona HI and Las Vegas, she has homes in both states( She is a lucky "dog")she brings her huge Mastiff onboard with her, she even posted a photo of him sitting on a seat on board, met the crew etc. She has her own animal rescue called "Sir's Rescue Rangers" not even sure how she managed that one but she can take him on board flight but he is suppose to lay on the floor near her feet, she usually get bulkhead seats so he has some room. Not sure how he ever was allowed on the seat during the flight. She has a legit rescue from what I gather, she is often on the local tv news with her dog in his little rescue vest asking people to come to open houses to find a pet to adopt.
Other then getting a service dog, large breeds must go cargo, my bro and SIL work for the airlines and he told me it is rough on the dogs, they often slide around in the hole.
When I flew my Dobie to HI I got some relax meds for him, not sure if they helped or not because he looked hung over after the flight.
Good luck, maybe you should actually take a personal trip to the airport and ask some questions about how many dogs you can take maybe if you fly with someone else that could work out, each taking one dog only. Some airlines only allow a certain number of dogs on board per flight.
I had major issues trying to bring a bird on board from Vegas to Budapest, a real tear jerker, couldn't take him after all we went through with vet certificates, permission and calling the airlines half dozen times to make sure I could bring him, only took one stupid guy working the check in counter to mess all our plans up. I cried from Vegas to Germany, still miss that bird, thankfully we were able to arrange for someone to pick up and adopt the bird last min.Good luck, if your not going to be in HU long term then I personally wouldn't bring either of them, have someone watch them if only for a few months time.
Again check in person with the airlines, they all have weight requirements carrier requirements as well.
Also hate to mention it but my bro said yes, they are suppose to give pets some water at times but only when the plane lands between stops. There is no human going into the cargo hold to give any pets any water. He also said most of his fellow employees don't always take things seriously and basically he told me good luck with my dog on that short 6-7 hour flight .Sometimes one employee just assumes the pet had water or they are just plain old lazy and don't want to go up to a scared strange dog and perhaps get snipped. In other words, don't count on the airlines doing anything for your dog. Also Aug. is hot and not a great time to be down in cargo.Sorry, just being honest.