Red-eye flights are flights that typically depart late at night and arrive early in the morning, often leaving passengers feeling bleary-eyed and sleep-deprived. These flights are popular among travelers who want to maximize their time at their destination, as they allow them to arrive in the morning and start their day without wasting time traveling during daylight hours. However, the lack of sleep and disrupted circadian rhythm can lead to jet lag and fatigue, making it challenging to adjust to a new time zone. Despite the drawbacks, red-eye flights can be a convenient and cost-effective way to travel for those willing to sacrifice a good night's sleep for a few extra hours at their destination.