"Chicke Run" fabulous film. I love the bit when Ginger is in the cooler (coal bunker) doing the Steve McQueen baseball bit with a cabbage.
Not stricly a flying film, but Apollo 13 is a really terrific example of managing to sustain the tension even though we all know the outcome before the film starts.
Hpowever, I agree with another poster that "The Sound Barrier" is fantastic. Rivetting, realistic with just a little of old British movie cheesiness.