Red-eye flights are flights that depart late at night and arrive early in the morning, often requiring passengers to sacrifice sleep in order to save time and money. These flights are popular among business travelers and those on a tight schedule, as they allow passengers to arrive at their destination early and maximize their time. However, the lack of sleep and disrupted sleep patterns can make it difficult for passengers to adjust to their new time zone, leading to fatigue and jet lag. Despite these challenges, red-eye flights remain a popular choice for travelers who value efficiency and convenience, as they can save both time and money.