Whatever the reason for your airline trip, don't just show up at the airline counter with your dog and expect to jump right into your window seat. (Generally, you should plan on checking in your Pug (or any other breed) at the airport two to three hours before your departure.) Airline travel with dogs isn't a spur-of-the-moment thing. The airline industry and individual airlines have conditions and rules that may not be so friendly to dogs who want to spread their air wings.