Becki Klinger has been a dog trainer for over five years, and over that time she's learned dogs have as wide a range of personalities as humans.
And just like humans, different dogs react to flying in different ways.
"Make sure you're your pet's advocate, that's the biggest thing," Klinger said.
On the heels of a puppy's tragic death on a United Airlines flight, she said before getting on a flight with your dog, talk to your vet about the best way to travel for your pup.
Klinger said she's never heard of a flight attendant forcing a dog's case to go up into the overhead bin, but especially with breeds like French Bulldogs, which are typically hard-of-breathing, not keeping them beneath the seat can cause problems.
United Airlines' policy about dogs traveling onboard is consistent with FAA regulations. Dogs under 20 pounds must be kept in a small kennel under the seat in front of you. The airline said it's currently investigating the French Bulldog puppy's death.