As of 9:10 a.m. local time on Wednesday, at least 1,255 inbound and outbound flights from Beijing Daxing International Airport and Beijing Capital International Airport were canceled, according to data from Flight Master.

According to the customer service of Air China, if the flight ticket was purchased before June 15 and the travel date is between June 16 to 30, the company is offering full refunds to passengers. China Southern Airlines has also waived refund fees for some Beijing related flights.

The customer service also explained that the refunds can only be processed through the customer service call, no online service is being provided so far. 

The aviation data tracker showed that half the scheduled inbound flights and around 67 percent of the outbound flights from the two airports have been or are likely to be canceled on Wednesday. 

Beijing recorded 31 new infections on June 16, bringing the cumulative infection toll since last Thursday to 137 cases. Beijing authorities on Tuesday raised the alert level to two, the second-highest level in a four-tier COVID-19 emergency response level system.