As said above, I'm not so sure about the wisdom of investing in an airline. If you have the resources to make short term trades (keep in mind fees for each transaction), it's not a bad plan to pick up some low stock that is going up. However, as you seem to be aware, PNCL may not be the best choice for a low buy... I would say to invest in the furniture. At least that has a warranty if it tanks.

What's the best way to become a millionaire investing in the airlines?

...Start off as a billionaire.