Can you use headphones on an iPad Air

If your iPad model does not have a 3.5mm Headphone jack, you can use an appropriate adapter that includes a suitable DAC (Digital to Analogue) converter.

If your iPad Air has a Lightning connector, you might use an Apple Lightning to 3.5mm Headphone Jack Adapter:

https://store.apple.com/uk/xc/product/MMX62ZM/A

Alternatively, if you have an iPad Air4 or 2018/2020/2021 model of iPad Pro, with a USB-C connector, you might consider an Apple USB-C to 3.5mm Headphone Jack Adapter:

https://store.apple.com/uk/xc/product/MU7E2ZM/A

Other third-party adapters also exist - in particular for USB-C, where many USB hubs incorporate a DAC and 3.5mm jack.

Yes. Depending on the exact model, you can use traditional 3.5mm headphones or Lightning Headphones and all models can use bluetooth wireless headphones.

Some models may require use of an adapter to use the traditional 3.5mm headphones.