I flew out of Henderson in a 172, over to the Hoover Dam, then on to the Grand canyon. In my opinion it's best viewed from the ground as well, as from the air you don't get the shadows that seem to change the look of it, also to be able to sit in awe and take in the beauty which you don't get in such a brief look down from an aircraft. Whatever you do, enjoy it, it's well worth the journey.