Can significantly disrupt travel plans, leading to inconvenience and frustration for passengers. These irregularities include delays, cancellations, diversions, and overbookings. Delays may occur due to various reasons such as adverse weather conditions, technical issues with the aircraft, or air traffic congestion. Cancellations can result from mechanical problems, crew unavailability, or operational challenges faced by the airline.

Diversions often happen when an aircraft cannot land at its intended destination, typically due to severe weather, medical emergencies on board, or airport closures. Overbooking, a common practice by airlines to ensure full flights, may lead to passengers being denied boarding if more tickets are sold than available seats. Each type of irregularity requires airlines to follow specific regulations and provide compensation or assistance to affected passengers, which may include meal vouchers, accommodation, rebooking on alternative flights, or financial compensation, depending on the length and nature of the disruption. Understanding the causes and handling of flight irregularities can help passengers better prepare for and respond to these unforeseen travel challenges.