What's the best way to fly with my dog?

Hey Dog Owners!

I’m planning a Trip :airplane: and what is the best way to fly with my dog? I Want to be sure of what is required for my furry friend to travel with me comfortably and safely with me.

Any Tips and insights will be highly appreciated.

A small dog is permitted as a carry-on on the majority of US flights. For details, visit the websites of the airlines. A fee is typically added to the price of your ticket. I paid $150 to fly AA the last time. Bookings must be made well in advance. Pets are limited by airlines to a certain number per flight.
For the duration of the flight, your dog must remain in its carrier. Carriers are usually limited to about 19" tall since they have to fit under the seat in front of you.