I'm sure you can find this as a wig:

If you buy some nice over-ear headphones and wear those, you can hide airpods in your ears, under the headphones

Have you tried asking for the option to wear them ahead of time? People tend to be less allowing and less forgiving when you're trying to be sneaky.

If you're autistic (or similar) you may even have the right to headphones and other accessibility tools when it's not a safety hazard. But that means announcing it to the people in charge and communicating your needs and rights beforehand.

Or you can grow your whole hair out to cover your ears, especially if it's curly it should provide good cover once it's long enough.

I used to work with a girl who wore hijab, and AirPods. Never saw the AirPods, just noticed when she paused her music through her hijab. So, that.

If this is the US, you're part of a protected class. You might be able to get a medical exception that allows you to wear them for sensory purposes or whatever.

Does it have to be airports? Other brands have lesser footprint and are less noticeable. Wearing a beanie may be an option.

Put them under some over-ear headphones.

Colour it to your skin tone.

I wear purple and blue Loops and own it.

Full face helmet.

I saw an israeli woman once with a really stealth bluetooth earpiece. I only mention her context because I've searched and searched but never found anything similar. You could barely see it.

In ear hearing aids or similar?

Earmuffs