Teach your pet how to drink from airline water bottles.
It can be challenging for pets to drink from the water bottles attached to the crate during the flight.
You can introduce the water bottle to your pet by smearing a small amount of xylitol-free peanut butter or liquid cheese on the nozzle. Encourage your pet to lick the nozzle to get the treat, and repeat this throughout the day until they become comfortable.
Once they are comfortable, fill the water bottle with something tasty like chicken stock, and present it to your pet to drink. Once they learn to associate licking the nozzle with the tasty liquid, they will be able to finish the water bottle easily. Eventually, you can replace the chicken stock with plain water.