The lesson in all this ? Don't invest in airlines unless you buy the shares ate sold what they are actually worth - at cost value, around $0.05 per share.
The actual airport corporations (if floated) are a bigger money spinner than the airlines so they would be a better option to invest in.
Remember, airlines are subject to rapidly changing markets caused by economic downturns, natural disasters, accidents, oil pricing instability and so forth.......good luck.