The prototype of the 737-300 was finished on January 17, 1984. It made its first flight on 24 February 1984. The plane became allowed to fly on November 14, 1984. USAir got the first 737-300 on 28 November. The plane was very popular. Boeing got 252 orders for it in 1985. It got over 1000 in total. The 737-300 series was made until 1999. The last plane was delivered to Air New Zealand on 17 December 1999.