Southwest Airlines hopes to start service to New York City's LaGuardia Airport next year.
Midway Airport was not its usual busy self today.
Perhaps that had something to do with Southwest Airlines cancelling all of its flights in and out of the South Side airport, about 140 flights.
Southwest makes up about 80 percent of the airport's traffic.
Not everyone was grounded, though. At least a few passengers were able to escape the airport and one way or another.