Yes, you can take cremated human and pet remains / ashes on a plane.
We recommend you advise your airline that you will be travelling with cremated remains.
There are no restrictions that apply to cremated remains on domestic flights.
There are no restrictions that apply to human cremated remains on international flights, but pet remains must go in checked luggage.
The container when carried as carry-on will be inspected, but not opened. The container may also be subject to trace detections, a non-intrusive security measure where swabs are taken from the container’s exterior.
You will be asked to relinquish all dangerous or prohibited items found in your carry-on luggage. If you refuse:
We x-ray bags going on planes to make sure there is nothing dangerous in them. If something comes up on the x-ray that needs checking, the bag will be opened, searched and any dangerous or prohibited item will be removed.