Indian budget carrier IndiGo has banned children aged under 12 years from its premium extra leg room seats, branding the rows as "quiet zones".
The airline said in a statement that row numbers 1 to 4 and 11 to 14 are generally to be kept-child free as it tries to promote a calmer environment.
"IndiGo endeavors to extend courteous and hassle free experience to all passengers," the statement read.
"These zones have been created for business travellers, who prefer to use the quiet time to do their work."
However, there are no similar restrictions on children in the rows next to the quiet zones - or the rest of the aircraft.
IndiGo claimed the on-board quiet zone for passengers is already an international practice.
Other airlines have tried the concept including Scoot, a Singaporean budget carrier and AirAsia X of Malaysia.
But in 2013, the travel website Skift surveyed several U.S. domestic carriers who all said they had no plans to introduce child free areas.