The Airbus A320neo family (neo for new engine option) is a development of the A320 family of narrow-body jet-airliners produced by Airbus. Launched on 1 December 2010, it made its first flight on 25 September 2014 and it was introduced by Lufthansa on 25 January 2016. Re-engined with CFM LEAP-1A or Pratt & Whitney PW1000G engines and fitted with sharklets as standard. The A320neo family is based on the previous A319, A320 and A321. As of January 2020, a total of 7,395 A320neo family aircraft had been ordered by more than 115 airlines, making it the fastest selling commercial aircraft ever.
After a year in service, Airlines confirmed the 20% efficiency gain per passenger with up to 180 seats, along with reduced noise and CO₂ emissions. Operators confirm the 15% per seat fuel-burn savings even counterbalanced by the added weight on short sectors, which can rise to 16–17% on longer routes and to 20% or more for Lufthansa with 180 passengers up from 168 with two more seat rows.
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Text-Source: Wikipedia