I’ve always been a fan of waterproof and ruggedized cases for my drones.  Just because drones are smaller nowadays doesn’t mean that they should be neglected.  This is the bright yellow case that I use for my Mavic Air but it comes in other colors too.  A TSA lock and shoulder strap can be optionally attached, for enhanced security, comfort and peace-of-mind.  One added benefit of this case is that it also makes a great drone landing pad!  It most scenarios, it likely floats too!

Available on Amazon.comNanuk Drone Waterproof Hard Case with Custom Foam Insert for DJI Mavic Air Fly More Combo – Yellow
Available on Amazon.comMaster Lock 4687DNKL Instant Alert TSA Accepted Luggage Lock
Available on Amazon.comNanuk Neoprene Adjustable Shoulder Strap with Closed AirCell Cushioning for Cases and Messenger Bags and Briefcases