IndiGo aircraftReuters

Following other carriers, Indigo has also rolled out a flash sale, with fares starting as low as ₹1,727.

The travel period for tickets booked under the monsoon offer, which will end on 13 June, is from 1 July-30 September, 2015. The quarter is considered as a lean period in the aviation industry.

On Wednesday, state-owned airline Air India had announced a similar sale and its starting fares was ₹1,777 for domestic destinations. The booking for its monsoon offer ends on 12 June.

Air India's offer is applicable on travel period between 1 July to 30 September, 2015, covering 66 destinations in Air India's domestic network.

Last week, Jet Airways, SpiceJet, and AirAsia India had launched such offers to improve passenger traffic during the July-September lean season.

Domestic airlines witnessed a 21 percent growth in passenger traffic to 251.05 lakh during January-April 2015 as compared to 207 lakh in the same period last year, NDTV Profit reported.

The domestic aviation landscape has undergone a sea change with the entry of new low-cost carriers Vistara and AirAsia, resulting in competitive tariffs to gain market share.

Budget airline SpiceJet announced the launch of its discount sale last Tuesday. Its one-way fares start at ₹1,299.

The three-day sale was offered to celebrate SpiceJet's completion of a decade in the aviation industry and its return to profitability in the January-March quarter. The sale began on 2 June and ended on 4 June for travel period between 20 June and 31 July, 2015.

Debt-ridden budget carrier SpiceJet posted profit for the first time in seven quarters. It earned a profit of ₹22.5 crore in the March quarter.