Snub Nose Breeds (brachialcephalic breeds)Most American airlines (Delta, United, American, Alaskan, Hawaiian) no longer accept snub nosed breeds, including pitbulls, staffies and American bullies for carriage.
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Most larger dogs aren't allowed in the cabin (with exceptions for trained service animals) and will have to fly in the cargo hold. Many air carriers have completely banned specific breeds—like pit bulls—from flying at all.
A: Because of their anatomical abnormalities, short-nosed breeds seem to be more vulnerable to changes in air quality and temperature in the cargo hold of a plane.
In a press release issued on Monday, Delta Airlines defended their decision to ban pit bulls and said it came after they noticed “a sharp increase in onboard animal incidents and attacks.”
In general, if your pet carrier (with your pet inside) can fit under the seat in front of you, your dog can ride in the cabin on flights that permit it. Typically, this would be a dog weighing up to about 20 pounds.