I would be very careful about taking an airband receiver onto an aircraft. Bear in mind that in many countries it is illegal to listen to aircraft transmissions, (although, bizarrely it seems that it is not illegal to own an airband scanner!) and it would certainly be emabarrasing to be arrested on arrival. The other point is that one would probably, based on the performance of scanners I have seen, only be able to hear your own aircraft's transmissions, and some of those around if they were close enough. A piddling 10cm aerial is no match for the serious hardware aboard a commercial aircraft.
However, as always, I stand to be corrected..