The maximum size for a cabin cat carrier is 19 inches long by 13 inches wide by 9 inches high. Soft-sided collapsible pet carriers may exceed these dimensions, but not by much. The cat must be able to stand up, move around, and lie down normally within the carrier.
Passengers may bring no more than one carrier on the flight. They are permitted to have as many as two cats in one carrier, but the cats must be at least 8 weeks old, and the combined weight of the cats and the carrier must not exceed 20 pounds.
For the safety of the cat and the passengers, the animal must remain in its carrier under the seat in front of the owner at all times during the flight. Cats may not be removed from the carrier at any point.
