(Havacılık) A red-eye flight is a flight operated by an airline late at night or very early in the morning, during the period from 9: 00 p.m. to 5: 00 a.m. local time. The term "red-eye" derives from the fatigue symptom of having red eyes. Red-eye flights are often called a "dry flight". This simply means that there is no moisture in the air at high altitudes during the late evening and early morning times