Why are domestic flights always delayed?

Mechanical reasons: Sometimes flight delays are due to mechanical failure. For example, the previous flight landed too heavily and the flight needed landing gear maintenance. Sometimes a short stay of 50 minutes is not enough. At this time, the seat will be maintained, and there will be some delay, but the time will not be long. Of course, generally speaking, there are many cancellations due to mechanical failure. The way to avoid this kind of delay or flight cancellation is simple: choose a reliable airline and refuse junk flights. Junk airlines such as Air Koryo and Air Canada, as well as some low-cost airlines in Russia and Eastern Europe. The most important way to identify junk airlines is the age of the aircraft. Is the Soviet jet during the Cold War more reliable or the A320 just assembled last year? The result is obvious. Generally, the reliability coefficient of airlines in former socialist areas and underdeveloped areas is relatively low. Of course, mechanical delay is not a trivial matter, and we should pay attention to both major and minor repairs. As a passenger, you should also have a normal heart.