From today, March 1st 2016, travellers under the age of 16 years old will no longer have to pay Air Passenger Duty (APD) on economy flights. This means families will see huge savings on their holidays when flying from a UK airport.
APD is set at £13 per person when flying within Europe (Band A) and to some North African countries though long haul flights attract around £73 per person however this may increase depending on which class a person is flying in.
Long haul trips over 2,000 miles will have the most significant savings. A family with, say, two children between 12 and 16 years travelling to the Caribbean or the USA (Band B) would save up to £146.
Incidentally, holiday-makers could seek refunds from their airline for flights tickets already purchased.
A complete list of bands and their destinations is available on the HMRC website.
Source : https://www.thetravelmagazine.net/air-passenger-duty-scrapped-for-under-16s/