If you're traveling with your pet this holiday season, it's a good idea to do a little advance planning. You should know your airline's policies and ensure your furry friend is comfortable in its carrier.

Jennifer Kopczynski, a former pet flight nanny who worked in the field for three years, previously told USA TODAY there are a few things travelers should do to make the experience as stress-free as possible for their pet.

She also said it's a good idea, especially with puppies, to avoid the designated pet relief area because those can be contaminated with germs.

Kopczynski said it's also smart to bring your pet in the cabin and keep them in a carrier with good sightlines so they can always see you. And maybe consider sneaking in the occasional pat through the zipper.

Most U.S. airlines, aside from Alaska Airlines, no longer permit pets to travel in the cargo hold as checked luggage, so if you're traveling with a larger pet, you may need to find an alternative, like another mode of transportation or shipping your pet as cargo separately.