Delta Airlines and American Airlines planes are going to take off from the airport in Boston, Massachusetts, in preparation for the Thanksgiving holiday.
The omicron variant of Covid-19 caused airlines to cancel more than 300 flights on Sunday.
More than 1,500 flights have been scrubbed since Friday. The spread of omicron among crews was cited as a reason for the cancellation.
Delta canceled 5% of its schedule, or 131 flights, on Sunday, after canceling 310 the day before. United had canceled 95 flights, 4% of its mainline schedule, down from the previous day. There were 236 flights that were canceled Saturday and Sunday.
The year-end holiday period is expected to include some of the busiest days of the year. Airlines offered extra pay to crews to work peak holiday periods and meet attendance goals after previous months of flight disruptions.
The highest staffing levels since the start of the Pandemic have been seen at the New York-based airline.
He said that they have seen an increase in sick calls from Omicron. We have had to cancel a number of flights and there is a possibility of more as we see more Omicron community spread.
The carrier was shortening its schedule to avoid last-minute disruptions and also assigning mangers to frontline operations if they are trained, a spokesman said.
The union said that the airline was offering double pay for flight attendants to pick up trips this weekend, even though it had canceled more flights than other airlines.
The Centers for Disease Control and Prevention was asked by the U.S. airline executives to loosen the guidelines for fully vaccine-vaccinated individuals who test positive for Covid to five days from the current 10. Last week, the CDC relaxed its guidelines for health-care workers.
