The Transportation Security Administration said it will hold off on changing its list of prohibited items on airplanes.
The agency had said last month that small pocket knives, as well as sporting goods like golf clubs, ski poles and sticks used for hockey, lacrosse and billiards, would be allowed on planes for the first time in more than a decade.
The changes were to go into effect Thursday.
The decision to allow knives with blades less than 2.3 inches was met with opposition from airlines and flight attendants. Despite the opposition, the TSA held strong to its plan until this week.
The Coalition of Flight Attendant Unions, which represents 90,000 flight attendants, said Monday it remained committed to never allowing knives on planes again, adding that the ban on knives was put into effect for good reason.
"Knives were the terrorists' weapons of choice in bringing down four jetliners and murdering thousands of Americans," the coalition said. "All knives should be banned from planes permanently."
The TSA Monday said the delay would allow more time for input from stakeholders.
"In order to accommodate further input from the Aviation Security Advisory Committee (ASAC), which includes representatives from the aviation community, passenger advocates, law enforcement experts, and other stakeholders, TSA will temporarily delay implementation of changes to the Prohibited Items List," the TSA said in a statement. "This timing will enable TSA to incorporate the ASAC's feedback about the changes to the Prohibited Items List and continue workforce training."
ABC News' Matt Hosford contributed to this report.