What wireless, all-in-one printers, can be used with an Apple MacBook Air 13" (2015)

Supported printers and scanners in macOS High Sierra, Sierra, El Capitan, Yosemite, and Mavericks is the last list provided by Apple. However, you can find new printers by the same manufacturers and just check that they have a printer driver for the version of the Apple OS you currently have installed on the computer.

You can also look for other printer drivers from Gutenprint Supported Printers.

What wireless, all-in-one printers, can be used with an Apple MacBook Air 13" (2015)

Any one of these AirPrint devices can be used: About AirPrint - Apple Support.

Other, non-AirPrint devices may be used, but an answer depends on the macOS version installed on that Mac: Find out which macOS your Mac is using - Apple Support.