Qantas has suspended all flights to Hong Kong for 36 hours as the Asian financial hub prepares for Typhoon Ragasa, one of its strongest super typhoons in years.

The carrier said Hong Kong's Airport will be closed from 8pm September 23 to 8am on September 25 in a statement, adding that it would contact customers who were affected.

Hong Kong-based airline Cathay Pacific said it expected to cancel more than 500 flights.

"Starting at 6pm tomorrow, September 23, Cathay Pacific's passenger flights arriving at and departing from Hong Kong International Airport will cease operations until resuming during daytime hours on Thursday," a spokeswoman for the airline said at a Monday press conference.

Ragasa is crossing the Luzon Strait between southern Taiwan and northern Philippines, and is expect

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