HONG KONG (AP) — China's biggest state-owned air carriers have hit back at a U.S. proposal to bar them from flying over Russia when traveling to or from the U.S.

The U.S. side has said such flights give Chinese airlines an unfair cost advantage over American carriers, which cannot cross through Russian airspace. Moscow closed Russian airspace to U.S. air carriers and most European airlines in 2022 in response to Western sanctions for Russia's invasion of Ukraine.

Air China, China Eastern and China Southern are among six Chinese airlines filing complaints over the order proposed last week to prohibit such flights by Chinese carriers.

China Eastern said in its filing this week to the U.S. Department of Transport that the proposed ban would "harm the public interest" and "inconvenience tra

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