Do I have to pay more for the cancellation and change of the flight due to the weather?

Legal analysis: If the flight is cancelled, it will be changed at no cost. Because of the cancellation of the flight, passengers "involuntarily" change the flight time or airline. No matter what the reason, it is the airline's breach of contract. In order for passengers to continue to choose their airlines for travel in the future, and for the reputation of the company itself, they are provided with the choice of returning, changing and signing for free.

legal basis: article 577 of the civil code of the people's Republic of China. if a party fails to perform its contractual obligations or fails to meet the contract obligations, it shall bear the liabilities for breach of contract such as continuing to perform, taking remedial measures or compensating for losses.