The Pentagon plans to offer deals to international buyers of the F-35 fighter jet that would undercut the price paid for planes destined for U.S. forces, the program’s military chief said Thursday.

Lt. Gen. Chris Bogdan said he planned to offer multiyear deals to overseas buyers, a move that would help boost production of the jet and aid efforts to reduce its average cost.

The Pentagon negotiates deals on behalf of overseas nations with the F-35’s prime contractors, Lockheed Martin Corp. and the Pratt & Whitney unit of United Technologies Corp. […]