BANGKOK (Reuters) - Thailand's cabinet has backed a plan to buy four fighter jets starting in the next fiscal year, an air force spokesman said on Wednesday, with a budget of 13.8 billion baht ($413.67 million) set aside for the procurement.

       The approval follows a recent expression of interest by the air force chief, Air Chief Marshal Napadej Dhupatemiya, in procuring eight F-35 fighter jets from Lockheed Martin Corp of the United States.

       The cabinet has agreed the budget for a four-year period starting in the 2023 fiscal year, to replace some of the country's aging F-16 jets, air force spokesman Air Vice Marshal Prapas Sornchaidee told reporters.

       Thailand's currently has 12 JAS-39 Gripen fighter jets made by Sweden's Saab and dozens of American F-16 and F-5 jets, some of which have been in operation since the late 1980s.

       Napadej last month expressed a preference for the stealthy, fifth-generation F-35 because its price had fallen since it first hit the market.

       The first F-35A cost $221 million in 2007 but as production quantities and know-how increased, the price fell https://reut.rs/33oKoR2 to about $79 million as of July last year as it gained appeal and buyers in more than a dozen countries.

       Spokesman Prapas said the type of aircraft to buy would be decided by two committees tasked with assessing the suitability of different aircraft.

       ($1 = 33.3600 baht)

       (Reporting by Panu Wongcha-um and Panarat Thepgumpanat; Editing by Martin Petty)