Without divulging details, he said the number of aircraft to be ordered will depend on the deal that it gets from the manufacturers.
"We are negotiating with manufacturers. We hope that the order can be placed in this financial year... This will be for a significant number of aircraft. We still have to decide on the exact number and it would depend upon the deal that we get from the manufacturers," Singh said.
"We are inducting six aircraft this month. This will be the largest induction by any airline in India in a single month and we are very hopeful that we will do well," Singh noted.
At present, SpiceJet has a fleet of at least 35 aircraft that includes Boeing 737s and Bombardier Q400s.
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Speaking to reporters on the sidelines of a conference here, organised by aircraft maker Boeing, he pitched for cost reduction in the domestic aviation.
India is a very price sensitive market and there is a need to bring down cost by rationalising taxation, reducing cost of airports as well as that of ATF (Aviation Turbine Fuel), he added.
"Today, the total traffic is 70 million passengers in a year, now one passenger typically flies three times in a year. So if you divide, just 25 million Indians are flying today in a population of 1.2 billion people. That is a massive opportunity," he noted.
Singh, the original co-founder, took back the reins last December amid SpiceJet facing turbulent times.
He acquired 58.46 per cent stake from then promoters Kalanithi Maran and Kal Airways Pvt Ltd.