More than 1,200 flights have been canceled within, into or out of the U.S. on Sunday, led by cancellations in top carriers Delta Air Lines and United Airlines
More U.S. flights cancelled in wake of Microsoft-CrowdStrike global cyber outage
More than 1,200 flights have been canceled within, into or out of the U.S. on Sunday, led by cancellations in top carriers Delta Air Lines and United Airlines