Discussion with Qatar Airways on marketing collaboration only:

No-frills carrier IndiGo today said it is in preliminary discussions with Qatar Airways to explore a marketing collaboration but termed as "baseless" reports of the airline offloading stake to the Gulf carrier.
"IndiGo is in preliminary discussions with Qatar Airways to explore potential marketing arrangements based on mutual interests," the airline said in a statement here.
IndiGo's official confirmation that it was in discussions with Qatar Airways comes ahead of the no-frills carrier gearing up for an initial public offer worth nearly Rs 2,500 crore.
Interestingly, Qatar Airways had yesterday confirmed its talks with IndiGo and rejected reports that it was eyeing investment in the low-cost carrier SpiceJet.

News reports about any possibility of Qatar Airways acquiring a stake in IndiGo are completely baseless, IndiGo said, adding, "We wish to confirm that there is no discussion, leave alone negotiation about any potential equity or other financial investment by Qatar Airways in IndiGo."
Several times in the past also, the Doha-based airline has evinced interest in picking up stake in IndiGo.
In a detailed statement yesterday, Qatar Airways had completely denied reports that it was in talks for a "commercial stake" or partnership with another Indian low-cost carrier SpiceJet.
Noting that it has "no interest" to engage in a partnership with SpiceJet, Qatar Airways had said, "These stake sale comments are unfounded and are believed to be deliberately spread to influence share valuations".