Pet Carrier Guidelines for Cabin Pets:
In cabin pet carriers: 19"L x 13"W x 9"H.
Soft-sided pet carriers such as Sherpa bags may exceed these dimensions slightly because they are collapsible. Animals must be able to stand up, turn around and lie down in a natural position in the kennel. Soft-sided pet carriers are accepted as long as they are constructed of water-repellent, padded nylon with mesh ventilation on two or more sides.
(excerpt from AA 05/2013)
United Airlines - Travel for Animals In-cabin pet kennels:
Hard-sided kennels: 17.5"L x 12"W x 7.5"H (44 cm x 30 cm x 19 cm).
Soft-sided kennels: 18"L x 11"W x 11"H (46 cm x 28 cm x 28 cm).
Call United PetSafe Desk at 1-800-575-3335 or 1-832-235-1541.
(excerpt from UA 05/2013)
Small, domesticated cats and dogs that will fit in an approved carrier under the seat are accepted for travel. Pets will not be allowed for flights that include a Southwest Airlines segment.
The pet kennel is limited to maximum dimensions of 8.5"H x 17"L x 12"W
The carrier must be leak proof and ventilated on at least two sides.
There is no weight restriction on pets.
The pet must remain in the carrier and under the seat for the duration of the flight.
To transport your pet in cabin either soft- or hard-sided kennels must be leak-proof and ventilated on at least two sides. Kennels are not sold at Delta Ticket Counters, but are available at most pet supply stores. Carry-on Information
To transport your pet as checked baggage or cargo, you must use an approved shipping kennel, and it must ship in accordance with the U.S. Department of Agriculture (USDA) guidelines. The kennel must provide enough room for your pet to stand and sit erect — without the head touching the top of the container — and to turn around and lie down in a natural position. Shipping Pets In Cargo
(excerpt from Delta 05/2013)
Soft-sided and hard-sided carriers specifically designed as pet carriers are acceptable. The carriers must be leak-proof and well ventilated.The under-seat dimensions are as follows: