I'm assuming you want to know the ending...here is a site that should be able to help you.

Can't you just re-watch the end of the DVD?

If all else fails..here's the ending...It ends up the sky marshall is the bad guy and is in it with one of the flight attendants for money. But, he tells the pilot that Jodie's Foster's character is trying to hijack the plane and wants money. No one figures out what is really going on but Jodie. She plays along with being the hijacker, and is able to find and save her daughter (who was going to be blown up). She detonates the bomb that blows up the sky captain. Jodie's character excapes (holding her saved daughter) and walks by the other passengers who mainly are shocked to see her holding a her daughter.

Sorry I didn't explain it too well but not sure where you dosed off.