Air carriers have their own regulations concerning a (1) a certificate of health from a USDA accredited veterinarian within 10 days of any travel date; (2) a summer pet embargo when temperatures are forecasted to be above 85F / 29.5 C at any point on the itinerary (origin, transfer, or final destination); 75F / 24C for snub -
nose animals; (3)
limits on the number of service animals and small pets
allowed as carry - on luggage in cabin on a flight, (4) specific air kennel dimensions and strength to ensure the comfort and safety of the animal, and others.