His comments come against the backdrop of high crude oil prices hurting the airline industry as Aviation Turbine Fuel (ATF) alone accounts for over 40 per cent of a carrier's operational costs.
"Airlines across the world are suffering from high oil prices and in India we compound the problem with significant taxes as well.
"The depreciation of rupee has been a big issue... many of our costs are denominated in dollars. Of course, there is great stress in the sector," Singh said.
Despite the fact that India is the fastest growing aviation market in the world, it has been very tough to pass on the sudden increase in costs because things happened together -- the increase in oil prices and depreciation of rupee, he noted.
On why airlines are not able to increase fares, the SpiceJet's Chairman and Managing Director said it has all happened at a time when the season is a little weak.
"This is the seasonal fluctuation where as you know July, August, September is the weakest. Travel demand is little depressed at this time," he added.