Thousands more flights were canceled Monday Southwest Airlines as the effects of winter storms and operational challenges continued to impact holiday travel.
The big picture: The Department of Transportation tweeted that it would look into the actions of Souhwest, which accounted for a large amount of the more than 3,90s flight cancelations and 8,200-plus delays within, into or out of the U.S. as of late Monday, per FlightAware data.
