In 2015 , constructions began to turn the airport into an international airport becoming Nepal 's second international airport to relief pressure currently sustained by the congested Tribhuvan International Airport . It is planned to have a runway and sixteen international parking bays . The project is financed by a loan and grant aid from the Asian Development Bank . The contract to upgrade the airport was awarded to the Chinese company '' Northwest Civil Aviation Airport Construction Group '' in October 2014 . The construction of the airport was set to be completed by the end of 2017 but the process was delayed for more than six months and the deadline of the completion was extended to 2019 due to the 2015 Nepal earthquake and the 2015 Nepal blockade . In July 2019 , the project 's deadline was extended and the expansion would be completed by December 2019
2015 Nepal earthquake
April 2015 Nepal earthquake
Gautam Buddha Airport