Alaska Airlines allows most small domesticated pets, including cats, dogs, ferrets, hamsters, guinea pigs, rabbits, non-poisonous reptiles and tropical fish. Certain small pets are also allowed in the passenger cabin. The number of pets accepted on a flight depends on the route and/or the type of aircraft flown.
Pets traveling in the cargo hold must be in kennels approved by the USDA and IATA. Certain dog and cat breeds that have short noses are not allowed, such as the Pekingese dog or the Persian cat, because their skull structure often inhibits natural breathing and the stress of a flight can increase the problem.
Alaska Airlines permits dogs, cats, rabbits and pet birds in the passenger cabin. Pets must be in a carrier small enough to fit under a passenger seat. Two small pets of the same breed may travel in one carrier as long as they aren't crowded. Maximum dimensions for hard-sided kennels are 7.5 inches by 12 inches by 17 inches. Soft-sided kennels may be up to 9.5 inches by 12 inches by 17 inches.
As of 2015, Alaska charges $100 one-way per pet. All pets must have vaccination and health certificates, though certain exceptions exist for in-cabin pets. Alaska does not allow pet travel during the Thanksgiving and December holiday seasons. If traveling to Hawaii, only cats and dogs are permitted. The State of Hawaii has strict animal importation laws that tend to make it more difficult to travel with a pet.