The country's largest airline IndiGo, which is focusing on internationalization, has received approval from the civil aviation ministry to wet lease up to two planes for operating flights to the United States and Canada, according to a senior official. For the first time, IndiGo started operating the wide-body Boeing 777 on the Delhi-Istanbul route in February. The plane has been taken on wet lease from Turkish Airlines. The airline has received a nod from the ministry to wet-lease two aircraft that can be utilized on this route. The official, on the condition of anonymity, said on Friday the ministry has also given approval for IndiGo to wet lease up to two wide-body aircraft which can be used for flying to the US and Canada.