[17] In June 2021, the opening was again postponed until early 2022, as final tests could not take place during monsoon season.

[21][22] In March 2022, it was announced that Jazeera Airways would be the first international airline to serve the airport.

[30] It has an east-west orientation with a designation of 10/28 and a 200 meters Runway End Safety Area (RESA) on both side.

There are two non-precision approach available at the Gautam Buddha Airport; VHF omnidirectional range along a distance measuring equipment (DVOR/DME) and Required Area Navigation (RNAV/RNP).

ILS at the airport is installed but not functional as Indian Skies will be used to fully implement it.

[35] On 2 June 2023 India has granted clearance for operation of Instrument Landing System (ILS) at the Gautam Buddha international Airport in Bhairahawa.

[37] The Government of Nepal sought suggestions on different designs for terminals of Gautam Buddha International Airport through social media.

[34] Notes: ^1 Both, Flydubai's as well as Qatar Airways's outbound flights from Siddhartangar to Dubai or Doha make a stop in Kathmandu.

[48] As of 2020 it is planned that a system of electric buses will serve Gautam Buddha Airport.