The airlines tweeted regarding the technical glitch and shared contact details seeking passenger co-operation.
Budget carrier IndiGo on Sunday reported a nationwide system failure that could trigger longer queues at all airports. The airline has now said that the systems are back up.
News agency ANI reported that systems at Delhi's Indira Gandhi International Airport are down due to a technical error. Passengers of the airline are currently stranded at the airport.
Many passengers tweeted about the discomfort caused and also posted pictures.