We cannot wait until the Sleepypod Air Carrier ($150) is released. There will be no need to worry anymore if the carrier will fit under the plane seat or not. The Sleepypod website has tons of informational graphics that show you exactly how to position your Sleepypod Air according to which type of plane you will be flying. So neat! But until it's available, we'll appease our pets with their Mobile Pet Bed ($153), which is just as cool, it just won't fit under the seat of an airplane.