Southwest Airlines is cancelling all of its Atlanta flights Saturday morning due to the snowstorm set to hit the region.

Dallas-based Southwest is the second-largest carrier at Hartsfield-Jackson International Airport.

Flights will be cancelled Saturday morning until 1 p.m. The airline is also reducing its Friday afternoon and evening flight schedule in Atlanta to six flights per hour.

The airline says customers with reservations for Friday or Saturday can rebook their flights or  travel standby without paying any additional charge, with certain limitations.

Southwest's cancellations come as Delta cancels about 350 flights from Friday evening through Saturday in preparation for the storm to hit its Atlanta hub.