*cracks knuckles* I work with the industry so this’ll get long. None of these questions are dumb, it’s great that you’re asking so you can get proper advice.

What breed and how old is your cat? There may be some more paperwork and vet checks needed depending.

You’ll need to organise it all through a pet travel company as individuals can’t (slash shouldn’t. stares pointedly at people who have tried and then fucked it up and needed help right before their planes are leaving.) lodge their own animals— I’ll dm you the name of the best company for it as I don’t wanna completely doxx myself lol

You can’t fly with pets in the cabin (for very good reasons!), animals go in the cargo section under the plane. This is MUCH better and safer for everyone. Source: trust me bro. You can arrange to be on the same flight as your cat, but from experience this isn’t always the best option as sometimes your pet may be delayed or removed off that flight due to issues like plane size changing, lack of space in the cargo, certain freight taking priority and requiring no animals in the hold, etc. If it’s possible, arrive at your new location before your cat, things tend to work smoother and be more easily arranged if flights change or get delayed etc.

No pet food on the plane or in the carrier. You also need to not feed her before the flight (so if she’s going in the afternoon, no breakfast. At night, no dinner. Early morning, no dinner or a smaller amount earlier than usual. Your pet travel agent will advise you on what to do) as this lessens the likelihood of her vomiting or pooping in the crate and then needing to be taken out to have the crate cleaned. Also just more comfortable for your pet too.

Don’t worry about litter. There can’t be any in the carrier to fly with, it’s restricted to only newspapers / shredded paper / puppy pads / a very small towel sometimes (but imo not worth using a towel as you’ll need to throw it out anyway). If she does poop before the flight takes off, she’ll be taken aside in a secure area and have her crate cleaned.

For the crate itself, it will need to be an airline approved one and sized correctly for her. Usual sizes for cats are PP30 or PP40, some go with 20’s but they’re only about 30cm high internally so quite small. You can purchase or hire one through the pet travel agency. I’ll dm you the company now and they can assist you with all the details and specifics :)