Airlines are warning that travel to, from or through Atlanta and other cities in the Southeast may be disrupted by a winter storm forecast for later this week.

Atlanta-based Delta Air Lines on Wednesday issued a waiver allowing travelers more flexibility to change their flight bookings ahead of snow that’s expected to hit Georgia on Friday.

The National Weather Service has issued a winter storm watch starting Friday morning, warning of significant accumulations of snow, sleet and freezing rain.

The Delta waiver applies to flights that have been booked for Friday or Saturday to, from or through its Atlanta hub, as well as Asheville, Charlotte, Fayetteville, Raleigh and Greensboro, North Carolina; Charlottesville, Norfolk, Richmond and Roanoke, Virginia; Columbia and Greenville, South Carolina; and Chattanooga, Tennessee.

The waiver allows certain rebookings without paying a higher fare.

Southwest Airlines, the second-largest carrier at Hartsfield-Jackson International Airport, also issued a waiver, warning that flights may be delayed, diverted or canceled in Atlanta and other cities by Winter Storm Cora from Wednesday through Friday.

American Airlines and United Airlines issued their own waivers for the winter storm expected to hit the region.

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8/26/17 - Atlanta, GA - Georgia leaders, including Gov. Nathan Deal, Sandra Deal, members of the King family, and Rep. Calvin Smyre,  were on hand for unveiling of the first statue of Martin Luther King Jr. on Monday at the statehouse grounds, more than three years after Gov. Nathan Deal first announced the project.  During the hour-long ceremony leading to the unveiling of the statue of Martin Luther King Jr. at the state Capitol on Monday, many speakers, including Gov. Nathan Deal, spoke of King's biography. The statue was unveiled on the anniversary of King's famed "I Have Dream" speech. BOB ANDRES  /BANDRES@AJC.COM

Credit: Bob Andres