 Delta Airlines has the most canceled flights, almost 900, and its biggest hub, Atlanta, has been impacted the worst. Alex Stone, ABC News. President Biden in Delaware recovering from COVID, but still battling growing calls by Democrats for him to step aside as the nominee heading into the weekend. The union representing American Airlines flight attendants announced it's reached a tentative deal on a new contract. It's under review and still needs to be ratified by 28,000 flight attendants. This is ABC News.