If you are following the law then you can't take your cannabis on the plane. Even if you travel from Nevada to a state where cannabis is legal, you are subject to federal law when you cross state borders, enter airspace, and enter the airport.
McCarran airport provides "Amnesty Boxes", these bins are about the size of a mailbox, bolted to the ground, monitored and designed to keep any cannabis that's tossed inside of them.
You will hear plenty of stories about people flying all over the country with cannabis products in their carry-on. It is not recommended. When you want more, just come back to Vegas!