The 70-hour sale will be open till August 11 for a travel period up to March 31, 2018.
Those already travelling with the airline will also be treated to Indian sweets.
Those celebrating their birthday on August 15 will be offered upgrades subject to availability of seats, the airline said.
Special return fares for economy class from New Delhi, Mumbai and Chennai, start at Rs 82,192, Rs 82,831 and Rs 83,750, respectively. The fares will be valid for a travel period between May 4 and June 28, 2018.