US officials have described Turkey's purchase of the S-400 missile defense system as "highly problematic," saying it would threaten the security of Lockheed Martin's F-35 fighter jets.
But Erdogan said in a meeting with university students in Istanbul that Turkey had conducted a technical evaluation and concluded that such a problem does not exist.
"They (the Americans) are passing the ball in the middle of the pitch now, expressing some rejection, but sooner or later we will receive (F-35) planes, the US refraining from delivering them is not an option," he said.
The United States is demanding that Turkey abandon the purchase of Russian defense batteries, which Washington says are incompatible with the alliance's defense network and pose a threat to F-35 stealth fighter jets that Turkey plans to buy as well.
US Secretary of State Mike Pompeo and several senior members of the US Senate warned Turkey that it would face sanctions over the purchase of S-400 missiles under a law imposing sanctions on countries seeking military equipment from Russia.
Turkey says that as a NATO member it poses no threat to the United States and sanctions do not apply to it.
The dispute is the latest in a series of diplomatic disputes between America and Turkey, including the extradition of Fathullah Gulen, disagreements over Middle East politics, the war in Syria and sanctions against Iran.