This is no place for a dog
Call and ask but it might be distressing for the dog. The engines vibrate, lots of strange people, several hours in the carrier with no walks, food or water, and depending on weather can be very warm. If the dog gets scared there's no place to let it out or let it calm down, and if it throws up or has an accident, the dog will have to sit in it for the whole trip which, again, is several hours. Unless the dog is a service dog trained for stressful environments, that would not be pleasant for the dog and accidents or barking would intrude on the other passengers.
Humm not sure
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