"Sooner or later, we will receive the delivery of the F-35s, their equipment, and S-400s, too, will come to our country," Erdogan said in Istanbul, where he met with young people.
"There is absolutely no question of stepping back on the S-400 issue. It's a done deal," he added.
Tensions between the U.S. and Turkey have reached a fever pitch in recent months with Turkey set to begin receiving the advanced S-400 Russian surface-to-air missile system that Washington said will jeopardize Turkey's role in the F-35 fighter jet program and which could trigger congressional sanctions.
Reporter's code: 50101