Several hundred Cathay Pacific flight attendants are camped inside Hong Kong's airport after union members voted for industrial action to protest their treatment by the airline.

Union member Ada So said Tuesday that about 400 cabin staff were camped out in front of the Cathay check-in desks.

She said more than 600 people cast votes, with most in favor of taking action.

They are protesting a cut to some cabin crew allowances, pay discrepancies for junior staff renewing their contracts and loss of legal support for workers involved in court cases such as civil action stemming from a passenger assault.

The protesters plan to remain at the airport until the company responds to their demands. If it doesn't, they'll step up their action.