A passenger died on a flight from Chicago to Mexico over the weekend, the airline said in a statement.
The snow has moved out of the Chicago area Monday, but bitter cold temperatures remain, prompting some schools to be closed.
Several inches of snow hit the Chicago area Sunday, causing hundreds of flight delays and cancellations and more closures at school districts across the area for Monday.
The "busiest square mile in aviation" is the nickname for Chicago's Midway Airport, which saw it's busiest travel day of the two week holiday period. More than 48,000 people flew in and out of Chicago's Southwest Side airport on Saturday.
A record number of people are expected to travel this holiday season. At Chicago O'Hare International Airport, hundreds of thousands were projected to come and go on Sunday as the holiday rush began.
The Brown community is in mourning as Chicago-area alums mobilize to offer whatever support they can to their alma mater.