These aircraft belong to different categories, including A320neo, A321neo, and A321XLR. The agreement includes 620 new installed engines and associated spare engines, as well as a long-term, multi-year service agreement. In 2019, IndiGo had selected LEAP-1A engines and signed a long-term service agreement for engines to power 280 A320neo family aircraft. Consequently, the new agreement secures the LEAP-1A engine and its long-term service agreements for a total of 590 IndiGo A320neo family aircraft. Currently, the airline is operating seven A320neo and 15 A321neo aircraft with LEAP-1A engines. "This is a pivotal milestone that reflects our long-standing commitment to rapidly strengthen our network, both domestically and internationally," said Ronojoy Dutta, Chief Executive Officer of IndiGo.