These are more fashion totes for out and about town. But most airlines do accept soft sided carriers for in-cabin use. The dimensions of these carriers will be within the requirements of any of the airlines I checked. Whether or not I would use them on a flight, would depend on the size of your dog. Personally, if I was taking mine on a plane, I would want a larger carrier (something like a Celltei or a Petflys). But I would not want to use either of those for about town carriers, as they are too bulky -- different carriers for different purposes. That is how I wound up with so many!
I am keeping a large carrier that will fit both of mine and meet what I would want for airline travel if I took them both. But I am also keeping a smaller carrier that fits just one that I can easily take on errands and such. I would have kept one of these, but thought since they were new, they would sell better than my older one.
If I was traveling with my male, these carriers would fit the requirements (as listed by 2 airlines below). My girl is larger and much taller. I do not think she could comfortably stand up in them when they are closed. They do stand on their own (see pics earlier in thread) and I do not see the top coming down on the dog, especially when they are snapped up. Closed position makes them more rigid and sturdy feeling.
American -- "The maximum size for cabin pet carriers is 23" long x 13" wide x 9" high. Per the Transportation Security Administration (TSA) mandate regarding carry-on baggage allowance, a pet kennel counts as a passenger's one carry-on bag.
Only one pet kennel per ticketed passenger may be accepted for travel in the cabin, as pets must go under the seat in front of you. The kennel may contain two (2) dogs or cats but they must be the same species, ages between 8-weeks and 6-months, and weigh less than 20 lbs. Animals must also be able to stand up, turn around and lay 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. All animals must be a minimum eight (8) weeks old for dogs and cats."
US Airways -- "They must pose no hazard to the safety of any customer and the container must pose no hazard to the safety or comfort of the animal. The animal must remain in the container under the seat in front of the customer at all times during the flight. The maximum size for a cabin kennel is 21" x 16" x 8" for hard-sided and 21" x 16" x 10" for soft-sided. The cabin kennel must be large enough for the pet to stand, sit and lie down when the container is closed."