Hurricane Sandy is still a threat, not a reality, to many would-be travelers – but not for long.

That’s why airlines are offering passengers the opportunity to tweak their travel plans in advance of the storm, which isn’t expected to hit the U.S. East Coast in full until late Sunday or early Monday.

United Airlines, for instance, is allowing those ticketed to fly in and out of 26 airports – from Charleston, South Carolina, up to Portland, Maine – between October 28 and 31 to reschedule their flights by November 4 with no change fee.