By increasing the number of flights to Varanasi, airlines are trying to cash on travel demand for Mahakumbh.
SpiceJet will add three flights this month to fly seven daily services between Delhi and Varanasi till March 17.
GoAir plans to operate four to five special flights on the route during the same period.
The Kumbh Mela is expected to draw close to 100 million visitors in all, including pilgrims, politicians, celebrities and corporate leaders, from around the world.
The demand for travel is highest on the six days when pilgrims take a holy dip in the river Ganga.
"We have added flights on the Delhi-Varanasi route till March 17.
"On an average, we get 85 per cent loads on the route and now