1. Weather restriction: Weather conditions may affect the take-off and landing of aircraft. If there is bad weather at the airport, route or destination airport, the flight may be delayed or cancelled.
2. Route restriction: The route may be restricted for various reasons, such as military exercises and emergencies, which may affect the flight time and route.
3. Deploy aircraft: If the number of company aircraft is insufficient or breaks down, it is necessary to deploy aircraft from other places, which may lead to flight delay.
4. Crew connection: If the crew's duty time exceeds the limit, or the company can't arrange enough crew for a flight, it may also lead to flight delay.
5. Company guarantee: If the company's guarantee resources are insufficient, such as oil, food and materials, it may also lead to flight delays.
6. Company planning problems: The company's flight plan may have problems due to various reasons, such as too many flights and unreasonable routes, resulting in flight delays or cancellations.
In short, there are many reasons for the frequent delay of Dragonair, but it is not excluded that some reasons may be problems that other airlines will also encounter. If you want to know more specific information, it is recommended to consult the official customer service of Changlong Airlines or the person in charge of relevant departments.