(AOF) – Delta Air Lines, American Airlines and United Airlines drop between 1.6% and 2.1% this Monday in pre-opening of Wall Street. It must be said that US airlines canceled more than 1,300 flights on Sunday, reports Reuters. This is in addition to the hundreds of cancellations already recorded on Friday (New Year’s Eve) and Saturday (Christmas). At issue: the sharp rise in Covid-19 contaminations, which have forced flight personnel to quarantine.