"The New York Times" reviewer Bosley Crowther called "Zero Hour!" an "exciting contemplation of a frightening adventure in the skies" based on a "good terse script ... Dana Andrews as the hero and Sterling Hayden as the captain are first-rate in these roles, keeping them hard and unrelenting." "Time" magazine, however, called the script a "bloopy inflation of a 1956 television show" and said its "moral struggle comes off fairly well, but the general situation is as patently contrived as one of Walter Mitty's daydreams."