When will the international space station be completed?
In July 2018, the Space Frontier Act of 2018 was intended to extend operations of the ISS to 2030. This bill was unanimously approved in the Senate, but failed to pass in the U.S. House. In September 2018, the Leading Human Spaceflight Act was introduced with the intent to extend operations of the ISS to 2030, and was confirmed in December 2018.
As of Septemebr 2018, when will the international space station mission be completed?
2030
International Space Station
No context provided
When will the international space station's main construction be completed?
2011
Assembly of the International Space Station
https://en.wikipedia.org/wiki/Assembly%20of%20the%20International%20Space%20Station
International Space Station
https://en.wikipedia.org/wiki/International%20Space%20Station
The process of assembling the International Space Station (ISS) has been under way since the 1990s. 
Assembly of the International Space Station
In January 2021, NASA announced plans to upgrade the station's solar arrays by installing new arrays on top of six of the station's eight existing arrays.[27]
Axiom Space plans on launching several modules to connect where PMA-2 is currently at as part of the commercial Axiom Station project. At the end of the ISS's life, Axiom Station could be detached from the ISS and continue in orbit as a commercial low orbit platform.
Assembly of the International Space Station cite note-29
Later additions included the Bigelow Expandable Activity Module (BEAM) in 2016, and numerous Russian components are planned as part of the in-orbit construction of OPSEK.
Assembly of the International Space Station cite note-29
The construction of the International Space Station, or ISS, began in the 1990s and the main construction was completed in 2011, though upgrades continue and future modifications are planned. As of 2018 the mission of the ISS was extended 2030.