Domestic air traffic grew at 17.36 per cent with Indian airlines ferrying 101.74 lakh passengers last month as compared to 86.69 lakh passengers in May, 2016.
IndiGo, the largest domestic airline by market share, returned to the top spot last month in terms of punctuality with 85 per cent of its flights arriving and departing on schedule.
The Gurgaon-based carrier had clocked a poor third in terms of on-time performance in April this year after retaining the top position in March, which it had lost last year to rival SpiceJet.
IndiGo also flew the maximum number of passengers at 41.91 lakh passengers, cornering 41.2 per cent of the total market pie, according to monthly traffic data released by the Directorate General of Civil Aviation (DGCA) on Monday.
SpiceJet, however, continued with the highest seat occupancy, registering 94.4 per cent load factor during the reporting month.