American Airlines and Qantas Airways are making a second attempt at gaining US regulatory permission for a joint venture that would allow them to coordinate prices and schedules, threating to cancel services if the proposal is rejected again. The pair’s application for a joint venture covering the United States, Australia and New Zealand was rejected in 2016 under the Obama administration amid opposition from rival carriers Hawaiian Airlines and JetBlue. The proposed joint business “will significantly improve service, stimulate demand and unlock more than $300 million annually in consumer benefits that are not achievable through any other form of cooperation,” Qantas said in a statement on Tuesday. The statement added that a rejection could result in Qantas reducing the frequency of, downgrading or even canceling its A380 service between Sydney and Dallas/Fort Worth, while American may further reduce services between Los Angeles and Sydney and Auckland.