Yes, you need to buy tickets for Child and Infant. The fares differ depending on the age of the child. When making a reservation for children please enter the exact age for each child and the fares are calculated accordingly. The Fares you see on Search results are already calculated according to the specific airlines and the children’s age. You can see the price breakup on the Price Details tab for each itinerary in the search results. All the international travelers including child and infant need to have valid tickets with passport and visa (Please check Visa info link for more details) while travelling.