I adopted a sweet little 12-pound terrier earlier this year. Freddie comes just about everywhere with me: planes, trains and even a few boat rides in 2021. All this travel with is made both possible and comfortable by way of our sturdy Sherpa carrier bag. It's got everything you want in a dog or cat travel bag and it's on sale for Black Friday, down to $28 at Chewy (discount automatically applied at checkout).
This Delta-approved bag is normally around $90, which is sadly what I paid. But you can bet I'm grabbing a second one at this price, just in case it ever goes missing. A very similar model in grey is even cheaper, down to $22, and $29 for the black bag without the Delta insignia.
The Sherpa is carry-on approved for major airlines (I've done it, don't worry) and is meant for dogs up to 16 pounds. You can get it in a larger and smaller size too, but the larger one won't be allowed on planes. The bag is super light and has a comfy strap. Plus, all the parts work smoothly and without issue: pockets, zippers, strap adjustment.
Chewy adds another $5 for shipping unless you get your cart over $49. That's not hard to do considering nearly the entire site is on sale, including toys, treats, beds, balls and just about anything else your pup could need.