AirAsia plans to ban children from the first rows in Economy class for the long-haul flights.

The "quiet zone" will be off-limits to those traveling with kids under the age of 12 because, according to the Malaysia-based airline, "we know that sometimes all you need is some peace and quiet for a more pleasant journey with us."

Malaysia Airlines, introduced a childless upper deck on its A380 from Kuala Lumpur to London. And there are data to suggest the policy responds to demand. Air Asia X does not plan to charge extra for the "quiet zone" beyond the standard US$11 fee to select a seat, rather than have the carrier allocate one to you at no cost.