Delta Airlines Seat Dimensions. 40 18-inch wide Delta Comfort seats with a 35-inch seat pitch. The kennel must fit completely under the seat in front of you and remain there at all times. Seat pitch and width can vary greatly among airlines - even among aircraft types for the same airline. Youre allowed one carry-on bag and one personal item with Delta Airlines at no extra charge.
The space under the seat depends on the type of aircraft you are flying on so they cant give you the size limit for personal items. The maximum dimensions for hard-sided carriers are 175 inches long x 12 inches wide x 75 inches high 44 cm x 30 cm x 19 cm. The two upgrade options include. And 34 21-inch wide Delta One seats with an 80-inch seat pitch. Likewise is D an aisle seat on Delta. Cabin dimensions limit width adjustments to large increments.
Thats not their official size but if it works for other airlines with similar fleets it should work for Delta.
In the event of a full flight you will be asked to take a later flight with available seating. There is a good chance that you could bring a bag that size when flying on a Delta flight. The two upgrade options include. They do allow a free carry-on if it is less than 16 x 14 x 12 but they say it has to go under the seat so I imagine the under- seat area will fit that size - probably on any airline. Make sure your bag fits this size or reference size check displays located at ticket counters and gates. It should be less.