Jetstar faces mounting opposition to its attempt to begin operations in Hong Kong after another two airlines revealed that they will fight the carrier's bid for regulatory approval.
A week after Cathay Pacific issued a blistering attack on Jetstar's plans, Hong Kong Airlines and sister carrier Hong Kong Express confirmed they have lodged filings with authorities in the Asian city opposing the budget airline's application for the right to begin scheduled services.
"Any extra opposition would make it more difficult [for Jetstar Hong Kong]," said Andrew Orchard, an aviation analyst for CIMB in Hong Kong.
"But Cathay would still be the one that the regulators would be most in contact with."
Unlike Cathay, Hong Kong Airlines and Hong Kong Express have not publicly detailed reasons for their opposition.
"We believe that the government will make the appropriate judgment based on the long-term development of the local aviation industry and the overall economic interests of Hong Kong," they said in a statement.
Jetstar Hong Kong is a joint venture between Qantas, Shanghai-based China Eastern Airlines and more recently Shun Tak Holdings, the listed conglomerate founded by Macau gambling billionaire Stanley Ho. The entry of a Jetstar offshoot to one of Asia's most valuable aviation hubs would pose the biggest challenge to Chinese-backed Hong Kong Express, which is in the process of reshaping itself into a low-cost airline.
Cathay Pacific has claimed that Jetstar Hong Kong will be in violation of the city's constitutional law because its principal place of business is in Australia, even though it has a local shareholder and managers.
Hong Kong's flag carrier has also argued that the plan to set up operations is an attempt by a foreign carrier to gain access to the city's pool of air-traffic rights without a "fair exchange of value to Hong Kong".
Cathay subsidiary Dragonair has filed its own objection with Hong Kong's Air Transport Licensing Authority.
However, Jetstar Hong Kong chief executive Edward Lau has dismissed the claims it is controlled by a foreign airline, and has reiterated that the carrier is confident of gaining all regulatory approvals.
Qantas had originally targeted the middle of this year for the launch of the budget offshoot, but delays in gaining regulatory approval have meant it is unlikely to get off the ground until at least December.
Despite the growing opposition, Mr Orchard said he believed Jetstar Hong Kong would eventually win approval from regulators, though he admits it might require changes to its plans to get it across the line.
Jetstar Hong Kong boosted its bargaining position last month when it named Pansy Ho, one of the richest women in Hong Kong and the daughter of Mr Ho, as its chairwoman.
Qantas, Shun Tak and China Eastern each own a third of Jetstar Hong Kong.