Passengers flying on United Airlines and Delta Air Lines from the United Kingdom to the United States will require a negative COVID-19 test no more than 72 hours before boarding their flight. “Delta will require new pre-departure COVID-19 testing for all customers traveling from the UK to the United States. Delta’s joint venture partner Virgin Atlantic is also implementing this new requirement,” a Dec. 22 press statement said. “Beginning December 24th, all passengers flying from the United Kingdom to the United States, or transiting through the United States, are required to show proof of a negative PCR or LAMP COVID-19 test taken less than 72 hours prior to departure,” the statement continued. The traveler must show proof of negative results before boarding the flight from the UK but passengers only transiting through the UK are exempt from the test. United Airlines also shared the details of its plan to impose …