The deal with Airbus was signed earlier this week and the delivery would begin from 2008, Air Deccan said on Saturday.
"The acquisition will help us in increasing the number of flights and also connect newer destinations besides expediting our growth plans," Captain G R Gopinath, managing director, Air Deccan said.
With enhanced orders and the resultant lower cost of acquisition, the airline would be able to provide lower airfares, he added.
Earlier this year, Air Deccan had placed orders for 32 Airbus A 320s and 30 ATR 72-500s and this fresh order would take up the total to 92 aircraft.
Started in August 2003 with one ATR aircraft, the Bangalore-based airline presently has a fleet of 24 aircraft comprising seven Airbus and 17 ATRs.
After the acquisition of the new aircraft the fleet size will go up to 110 to 115 planes by 2012-13. The airline will receive eight A 320s next year, followed by ten every year thereafter, taking the fleet size to 32 by the end of 2006.