The storm was concentrated in the Dallas-Fort Worth metropolitan area, home to both American and Southwest airlines — though with 419 canceled departures, Southwest had the lion's share of affected flights, according to FlightAware.
An alternative measure of cancellation rates on flight-tracking site Anuvu.com showed 9% of Southwest's flights had been canceled, compared with 6% of American's flights.
On Monday, it issued a winter weather waiver for 12 airports in the region that will allow affected travelers to get a refund or rebook for any flights canceled from January 30 to February 1.
The outsized Southwest cancellations come just weeks after a holiday travel meltdown prompted nearly 17,000 flights to be canceled, potentially affecting millions of travelers.
If your flight is delayed for any other reason, like weather, you are not entitled to any compensation or refund.