Massive Southwest Airlines disruption leaves customers stranded and call centers swamped

Last week's winter weather travel mess is lingering like a hangover into this week -- and the headaches are migraine-proportioned for Southwest Airlines and its frustrated passengers on Monday.

More than 3,600 flights within, into or out of the US had already been canceled by 4:10 p.m. ET Monday, according to flight tracking website FlightAware, while almost 5,800 flights had been delayed.

But Southwest accounts for a whopping share of those. None of the other US carriers have canceled nearly as many flights or as much of their schedule as Southwest....