Hong Kong, Aug. 14 -- Flight operations resumed at Hong Kong's airport Wednesday morning after two days of disruptions marked by outbursts of violence highlighting the hardening positions of pro-democracy protesters and the authorities in the Chinese city that's a major international travel hub.

About three dozen protesters remained camped in the airport's arrivals area, a day after a mass demonstration and frenzied mob violence forced more than 100 flight cancelations. But check-in counters were open and flights appeared to be operating normally.

The airport had closed check-in for remaining flights late Tuesday afternoon as protesters swarmed the terminal and blocked access to immigration for departing passengers. Tuesday's cancelatio...