United Airlines is reporting about 4% of its employees have tested positive for COVID-19, illustrating the operational struggles U.S. airlines are battling as the omicron coronavirus variant washes over the country.

Delta Air Lines has been forced by the Civil Aviation Administration of China (CAAC) to temporarily suspend its two routes to Shanghai after falling foul of the regulator’s COVID-19 rule.

Airbus is keeping a close eye on the COVID-19 situation in China’s Tianjin, home to the airframer’s only final assembly line in Asia, after authorities ordered a partial lockdown of the city in response to the detection of 40 cases linked to the omicron variant.

Netherlands’ Twente Airport is changing paths to embrace the evolving aviation landscape.

Virgin Australia is making major cuts to its domestic capacity as the latest COVID-19 wave causes operational disruption and weakens passenger traffic.

UK Transport Secretary Grant Shapps said with the omicron variant now so widely established, it made no sense to continue to enforce the stricter—and much more expensive—PCR tests to detect it. 

Cathay Pacific has dramatically cut back its planned capacity in response to the latest crew quarantine requirements and flight restrictions imposed by the Hong Kong government.

Hong Kong continues to take stiff measures to control the spread of the omicron coronavirus variant, temporarily banning passenger flights from eight countries.