NEW DELHI: IndiGo today said that its fleet size has increased to a 100 Airbus A320 aircraft after the delivery of ‘VT-IDR aircraft’ that joined its fleet on December 23, 2015.“The aircraft puja was done today, 24th December 2015, at Terminal 1D Delhi,” it said in a release."Ten years ago we had dreamt of one day being a part of 100 aircraft airline. Our sincere gratitude to over a hundred million customers who have chosen IndiGo and are the reason for us to have reached this milestone,” IndiGo President Aditya Ghosh was quoted in a release.The announcement of the airline becoming a 100-aircraft airline has come at a time when the airline’s expansion plan is under pressure due to the delay in delivery date of Airbus 320 neos. Earlier, the first A320 neo was to be delivered to IndiGo on December 30.As per the original plan, IndiGo was to induct 10 A320 neos in the current fiscal ending March 31, 2016. IndiGo had announced to acquire 180 A320s, including 150 A320 neos in 2011, the largest aircraft order by any Indian carrier at that time.