Passengers have been forced to seek accommodation in the city while airlines struggle to find other ways to get them to their destinations.
Air force chief ACM Chaiyapruk Didyasarin has asked air force officers to monitor and assess the unrest closely and prepare air routes, RTAF spokesman AM Pongsak Semacha said.
"It all comes down to landing [in Hong Kong]. It depends on the government. However, we are ready to act," he said.