A delay in flight operations was also reported from Mumbai, Bhopal, Bengaluru and Goa. Some passengers even took to Twitter to express their frustration and point out the delay caused by the technical snag.
"We regret the inconvenience caused to our passengers this afternoon due to system being down across airports for around 90 minutes. Our flights and check-in systems are operating normally now," an Indigo statement said.
The snag was subsequently rectified.
Earlier on Sunday, the airline had also issued an advisory on Twitter over its system failure at all airports. It asked its passengers to contact the airline through Twitter, Facebook, its website or its contact number for assistance.
"Indigo airlines server is down since last 45 minutes at Delhi airport. No contingency plans. People are waiting in queue," one Sandeep wrote on Twitter.