Missing a flight in a dream typically reflects the fear of a chance slipping past you while you're still getting ready for it -- feeling one step behind a deadline, a decision, or a version of your life you thought you'd have reached by now. The frantic run through the terminal is usually the real feeling on display.
Be wary and circumspect in your judgment, when a fortune is with a malevolent; nor be you overconfident that the malice of the infortune shall be averted. - William Lilly (1602.-1681.)