Search for a cabin pet carrier and almost every listing says airline approved. It's on ours too, from the supplier side, and we've taken it off.
Here's why: no organisation approves pet carriers for airlines. There is no certifying body, no standard, no test. Each airline publishes its own maximum under-seat dimensions, and those numbers differ between airlines — and sometimes between aircraft types on the same airline. A carrier that clears one gate gets refused at the next.
So the phrase means nothing. Worse, it invites you to stop checking.
What to do instead — four steps
1. Get your airline's actual numbers. Look up your specific airline's pet policy page. You want maximum length, width and height for an under-seat carrier, plus the maximum combined weight of pet and carrier. Write them down.
2. Check the aircraft. This is the step people skip. Under-seat space on a regional jet is smaller than on a widebody. If your booking includes a short connecting flight, the small aircraft sets the limit for the whole trip.
3. Measure the carrier — including the bits that stick out. Listed dimensions usually describe the main body. Wheels, rigid handles and external pockets add real centimetres that a gate agent will measure.
4. Check your pet fits the carrier, not just the carrier fits the plane. Airlines require the animal to be able to stand up and turn around inside. A carrier that squeezes under the seat but leaves your cat unable to turn is non-compliant and, more to the point, miserable for a four-hour flight.
Soft-sided has one real advantage
A soft carrier compresses. If the under-seat space is a centimetre tighter than the listed height, a soft top gives; a hard shell doesn't. That is genuinely why soft-sided carriers dominate cabin travel — not because they're “approved” and hard ones aren't.
The trade-off is protection. A soft carrier offers much less if it's dropped or crushed, which is why hard shells remain the sensible choice for cargo hold travel and for car journeys.
Where our carriers stand
Being specific, since that's the point of this article:
- The Foldable Cat Carrier is 43 × 34 × 45 cm, soft-sided polyester. That height is taller than many airlines allow under a seat — it will compress, but check your numbers before you count on it. It's designed for vet trips and car journeys.
- The Expandable Backpack Carrier comes in M and L with an expanding rear panel. The expansion is for rest stops on the ground, not for use in a cabin.
We are not telling you either of these will clear your airline, because we can't know your airline or your aircraft. If cabin flying is the main reason you're buying, get your airline's numbers first and email them to us at pawsomehavenshopserve@gmail.com. We'll tell you honestly whether ours fits — including when the answer is no.
The rest of the paperwork
The carrier is the part people obsess over, and it's rarely what goes wrong. What actually catches people out:
- Booking the pet. Cabin pet spots are limited per flight and go early. Book the animal when you book yourself, not after.
- Health certificates. Many airlines and most destinations require one issued within a set window before travel. That window is often short.
- Breed restrictions. Flat-faced breeds are refused by many carriers on welfare grounds, in cabin and hold.
Get those confirmed before buying a carrier at all. There's no point owning the right bag for a flight your dog isn't allowed on.