I think it makes complete sense. Puppies, in general, are very sensitive and can easily get scared during air travel—the noise, the pressure changes, the unfamiliar surroundings—it can be really overwhelming for them. So why put them through that kind of stress unless it’s absolutely necessary? I actually looked into it with Allegiant Air recently https://allegiant-air.pissedconsumer.com/review.html, and they do have a list of requirements for traveling with pets. It seems fairly straightforward, but even then, I’d say it’s always best to weigh the pros and cons and think of what’s best for the animal’s well-being