Baghdad signed an initial deal for the first set of 18 jets in September last year valued at roughly $3 billion and those aircraft are scheduled to be delivered by September 2014.
"The (new) contract is no different from the first contract in terms of the technical and financial details. This handover will be finished in 2018," acting Defence Minister Sadoun al-Dulaimi told reporters after a meeting U.S. officials in Baghdad.
Duliami said Iraq was also talking with U.S. officials about buying air defence systems and Apache helicopters.
Iraq has had no real air force since the 2003 U.S.-led invasion that toppled Saddam Hussein.
Baghdad, which has also signed military contracts with Russia and the Czech Republic this month, says it will not be able to defend its airspace until 2020.
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