Are Red Eye Flights Cheaper is a common question among travelers, especially those booking overnight journeys. Red eye flights are late-night flights that depart at night and arrive early the next morning, allowing passengers to travel while they sleep. The term comes from the tired, red eyes people may have due to limited rest during the flight. Airlines such as Delta Air Lines and American Airlines often operate these flights. While convenient for saving time, travelers should prepare for possible fatigue and plan their schedules accordingly.