The cons of red-eye flights are few, but significant for those they affect. Primarily, those who don't sleep well on planes are not likely to have a great flight experience when flying when they would normally be sleeping, and will likely arrive groggy. This can also lead to more severe effects of jet lag.

Whether a red eye flight—a flight departing late at night and arriving early the next morning—is a "bad idea" depends heavily on your personal sleep habits and your itinerary goals. The primary advantage is efficiency and cost; these flights are often significantly cheaper than daytime options and allow you to save on a night’s hotel stay while maximizing your time at the destination. For business travelers, it ensures a full day of work upon arrival. However, the downside is the physical toll; unless you are a deep sleeper who can rest in an upright position, you may arrive feeling exhausted, which can lead to a "lost day" of productivity or enjoyment due to severe jet lag and fatigue. In 2026, many travelers mitigate this by booking seats with extra legroom or using high-quality noise-canceling headphones. If you have a critical event immediately upon landing, a red eye might be risky, but for those on a budget or with limited vacation days, it remains a highly effective way to traverse long distances without wasting daylight hours.