The government had asked the companies for the delay to enable regulators to address how the new telecom signals might affect airport safety.
On Sunday the two telecom giants had declined a request by Transportation Secretary Pete Buttigieg and Federal Aviation Administrator Steve Dickson to delay the rollout past a planned Jan. 5 launch.that the change comes as the FAA was preparing to restrict pilots' use of certain automated cockpit systems.
The rules would be designed to avoid potential interference from wireless towers transmitting 5G signals, government and Industry officials familiar with the plan had told the Journal.
The paper also reported that people familiar with the matter said that Airlines for America, a trade group representing air carriers, had planned to ask a federal court to block the 5G rollout.. "We look forward to using the additional time and space to reduce flight disruptions associated with this 5G deployment.
"The wireless companies have offered to implement a set of mitigations comparable to measures used in some European operating environments.
"While U.S. standards and operating environments are unique, we believe this could substantially reduce the disruptions to air operations.
"These additional mitigations will be in place for six months around 50 airports identified as those with the greatest impact to the U.S. aviation sector."