Montego Air Flight 828 is a fictional airline flight featured in the television series Manifest. The show follows the story of passengers who experience a mysterious event during their flight, leading to their disappearance for five and a half years. Upon their return, the passengers discover that time has passed differently for them, and they must navigate the challenges of reintegrating into society. The series explores themes of fate, family, and the supernatural as the characters grapple with the implications of their extraordinary experience.