Air travel in the world's most populous country has boomed as incomes rise, but the industry scores poorly for customer satisfaction and constant flight delays top the list of complaints.
The phenomenon is often blamed on the military, which controls most of the skies over the country.
Only 51.16 per cent of departures from Shanghai Pudong airport left on time in August, according to figures from the Civil Aviation Administration of China.
Another complained: "I just want to say that every time I fly from Pudong it is miserable, sitting for two or three hours doing nothing even on a clear day. I was always told it was air traffic control."
The airports of Hangzhou, in Zhejiang province next to Shanghai, and Tianjin, the northern port next to Beijing, were the second- and third-worst for delays, the CAAC said.
As a sanction all three were this month denied increases in flights, including charters and applications for new routes, it said.
Chinese social media are regularly filled with tales of poor behaviour by travellers, sometimes the result of fury over lengthy delays.
In January police detained 25 angry passengers who opened aircraft emergency exit doors before take-off after their departure was delayed by snow.
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