The A320neo to be introduced in 2016 will be a new, more fuel-efficient variant, with a larger payload and a range of 500 miles. To date, Airbus has reported 2,817 orders for the A320neo. Among these are 345 firm orders for A320neos from six customers in Latin America, including Avianca. The A320neo will have much the same airframe as the current A320 series but a more efficient engine (either the CFM International LEAP 1A or Pratt & Whitney PW1100 G) and wing design that will help the jets achieve fuel savings of up to 15%. Airbus also estimates the jets will produce significantly less CO 2 and NOx emissions, and reduced engine noise. Avianca has partnered with Airbus on its fleet modernization and expansion programs for several years. In 2012, Avianca ordered 51 A320 aircraft, including 33 A320neo aircraft. The airline has ordered nearly 200 Airbus aircraft in total, most of which are in operation now.