Updated 6:25 p.m. ET with more cancellations
Delta says it canceled 680 flights Tuesday as the airline continued to struggle with computer problems.
Our original post continues:
Delta Air Lines announced it was grounding nearly 300 flights Tuesday, a day after a computer outage hobbled the carrier's communication and booking systems and forced it to cancel about 1,000 flights worldwide.
Tens of thousands of passengers were stranded on Monday.