The ability of residents Hong Kong to cross into mainland is one of the most visible signs of China's easing of border restrictions, with travelers arriving no longer required to undergo quarantines.
The budget airline says customers will no longer be able to call a live agent by phone. Frontier is encouraging customers to instead reach out by text, social media and WhatsApp.
President Biden has issued an executive order to try to improve efforts to free American hostages and detainees, senior administration officials told reporters.
Just like in the U.S., airlines and airports that slashed jobs during the depths of the COVID-19 crisis are now struggling to keep up with exploding travel demand.
The Justice Department argues that the order issued by the Centers for Disease Control and Prevention in early 2021 "falls easily within the CDC's statutory authority."
While the agency has lifted its travel health notice two years after putting it in place, officials say it's up to travelers to determine their own health risks before going aboard a ship.