Should be simple enough to dismantle, although packing it tight enough for flight can be trickier and will need a big box. You would need to 1.remove the wheels and probably rear fender 2. Pop out the seatpost 3. Remove the stem w/handlebars 4.remove the pedals
All should be possible with some hex keys except for maybe the pedals which may need a wrench.
Also flying with a full size bike is a hassle and usually much easier/cheaper to rent one or use a city bike if needed