IndiGo plans to induct 25-30 aircraft into its fleet in the next 400 days. Most of these will be Airbus A-320 New Engine Option, or Neo version.

The latest additions will see the total fleet strength of the 11-year-old, Delhi head-quartered low-cost airline touch 158 aircraft, sources indicated.

Incidentally, after starting its first flight in 2006, it was only in 2009 that IndiGo took delivery of its 25th aircraft. Now, it plans to induct 25-30 aircraft in a span of just over a year.

When contacted, IndiGo declined to offer comment on its induction plan.

The airline has not disclosed the latest induction programme beyond company President Aditya Ghosh.

Expanded fleet

At its third-quarter FY17 financial results conference call on January 31, it had said it expects to end the current fiscal with 20 Neo aircraft in its fleet.

IndiGo had ordered 430 Neo aircraft, the first of which landed in Delhi in March 2016 after a non-stop flight from the Airbus headquarters in Toulouse, France.

The Neo is distinguished by its large engine — 81 inches as compared to 61 inches of the Current Engine Option (Ceo). It also has large Sharklet wing-tip devices, which will together deliver 15 per cent in fuel savings from day one.

IndiGo became the second airline globally after German carrier Lufthansa to induct the latest civilian aircraft in its fleet. GoAir and Air India are the other domestic airlines which have the Airbus Neo in their fleet.