Yes, I have traveled with puppies at least a dozen times, and have always used the Sherpa bags for under the seat use. You can tell if it is
airline approved on the Sherpa site as it will have a little circle with an airplane on it if it is approved as a carry on for under the seat. If it doesn't have the little airplane emblem, then it is either not strong enough or not the right size. The Delta bag is just my favorite as it also has some nice pockets for carrying your other "doggy" items
besides just seeming to be a very sturdy bag.
I am actually taking a puppy to his new family in Seattle in around 10 days then visiting my parents in the area and the Sherpa bag will be what I use for the little guy going with me.
