Thanks for the recommendation. I wanted one with a little more width to it and that smashes down a bit. I think the Pet Flys aren't able to be flattened out, are they? Just in case it doesn't fit from the top. The last thing I want is to have to put my babies in cargo.
But I found 2 that I was wondering if anyone has any experience using them. One is the Sherpa AKC double carrier:
Sherpa Akc Double Pet Carrier 19 x 11 x 11.5 Inches
The other is the Pet Voyage carrier:
Walmart.com: Pet Voyage Sport Pet Carrier, Blue: Dogs
I was going to get the large one in the Pet Voyage which gives an 11 inch width. The size that I can fit under the seat is 19 Length, 13 width, and 8 height. Which is why I wanted a soft sided carrier so that I can smash it down a bit. Although I think more than 8 inches in height might work, too. I took my Kwigy Bo before and it fit under the seat. I think I may have pushed it down a bit. I don't remember. It was over a year ago. I took the measurements of the under the seat fit from a carry on luggage that I have that fits under the seat perfectly and it's 8 inches in height laying down.
Anyway, so if anyone has any recs on these 2 carriers or the pros and cons, please let me know. Thank you.