These are two really great personal bags for your next flight! I have used both of these on recent flights and they both fit under the seat. The backpack also can work as a carry on as you can see, so if you’re using it as a personal item you can’t stuff it full or you’ll have issues. But I LOVE all the compartments it has. My two biggest complaints about the other bag is that I wish it had broader, more padded straps and a larger pocket to keep a laptop separate, but overall still a great bag! LTKTravel