Map - Samarinda International Airport (APT Pranoto Airport)

Aji Pangeran Tumenggung Pranoto International Airport, also known as APT Pranoto Airport or Samarinda Airport, is the main airport in Samarinda, the capital city of East Kalimantan, Indonesia. It is in the district of Sungai Siring. The airport is also colloquially known as Sungai Siring Airport, to distinguish it from its predecessor, the now-closed Temindung Airport. The airport is named after Aji Pangeran Tumenggung Pranoto, the first governor of East Kalimantan who was in office from 1957 to 1961.

The airport started commercial operation on 24 May 2018, replacing the Temindung Airport. The airport is operated by UPBU APT Pranoto Samarinda, under the Ministry of Transportation. In 2022, the Indonesian Ministry of Transportation planned to partially sell the airport stake to foreign corporation and Astra Infra.

Having been in commercial operation since 2018, Samarinda Airport is an important Australian passenger gateway for East Borneo's wildlife, and an important contributor to Samarinda's economy, which is lying at BIMP-EAGA and bordering with the new capital of Indonesia. Strategically located at the heart of East Borneo and its proximity to the new capital of Indonesia, the transport authority is enhancing the airport's status as East Borneo's primary international hub airport.

In 2019, Samarinda Airport handled 1.1 million passengers and according to Indonesian government, the airport will reach its maximum terminal capacity (1.5 million passengers) if no extra terminal is added. About 68 percent of its flights are operated with narrow-body jets.

In the first half of 2021, the airport achieved the third most passenger rebound in East Borneo, recording a 1.22% increase year-on-year, ahead of Sultan Aji Muhammad Sulaiman Airport (fourth place). The figure still remains below the pre-pandemic (2019) levels. However the airport passenger market share actually increased by over 2% (23%) during the first half of 2021, compared to 2020 levels (East Kalimantan). The airport was chosen as one of the Top 11 Remarkable International-Class Airports in Indonesia by Wonderful Indonesia in 2020.

Sungai Siring Airport was designed as a replacement for the former Samarinda Airport (commonly known as Temindung Airport) originally built in 1973. Located in the densely built-up Sungai Pinang District with a single runway extending into settlements, Temindung had only limited room for expansion to cope with steadily increasing air traffic. By the 2000s, Temindung had become one of Kaltim's busiest airports – it far exceeded its annual passenger and cargo design capacities. One out of every 25 flights experienced delays, largely due to lack of space for aircraft, gates, and runway.

A 1992 planning study by Civil Aviation and Public Works departments identified the district of Sungai Siring, as a possible airport replacement site. Away from the congested city centre, flight paths would be routed over North Samarinda rather than populous urban areas, enabling efficient round-the-clock operation of multiple runways. The Sungai Siring (SGS) airport master plan was completed in 1995. In 1998, however, the government shelved the project for financial and economic reasons. The Airport Location Study was undertaken by Indonesian consultants. This study came up with four recommended locations for overall strategic development in Samarinda. One of the four assumed a new airport at Makroman; a second assumed a new airport at Palaran; the third assumed a new airport at Sungai Siring; and the fourth assumed a new airport at Bayur. In November 2003 the Governor of East Borneo announced that a decision had been made on the Airport Location Study. The strategy was a replacement airport at Sungai Siring, levelled to a height of 25 metres.

The consultants advised that the earliest the airport could be opened was June 2009. However, in reaching the government's decision, this date was modified to December 2007. Construction of the new airport began in 2005.

The construction period was very slow; specialists considered only 2–3-year period was sufficient for this aviation project. There was uncertain future of the airport construction after Panitia Pengadaan BSB manipulated the nomination of PT NCR as the contractor. It was originally believed that BPKP preferred to keep everything investigated and minimise financial commitments for the project temporarily, therefore stopping all construction. In practice, the airport did not finish in time for the investigation. However, the government of East Borneo gave an additional year's deadline.

Construction of the new airport was only part of the MP3EI Master Plan, which also involved construction of new road and rail links to the airport. The detailed design for the airport terminal was awarded to Arkonin, with Airmas Asri as specialist designers for airport related aspects. The terminal characterised by wingspanned curve roof and solar-powered rooftops. Project architects were PT Waskita Karya. The airport was Indonesia's second-best airport construction project, according to Indonesia.go.id.