The project comes as part of a wider effort to build a Central Transport Hub with a new mega-airport between the capital Warsaw and the central city of Łódź.
As part of the plan, all major Polish cities will become accessible by train in under two-and-a-half hours, including more distant cities such as Gdańsk in the north of the country, according to officials.
Over 1,600 km of rail lines are expected to be built to connect the airport.
Six contractors have been chosen to carry out environmental studies for the planned railway hub, with a budget of up to PLN 26 million (EUR 6.1 million). This follows on from initial consultations that were carried out across Poland during 2019.
Konrad Majszyk, director of communications for the Central Transport Hub project, said on Wednesday: “The railway project ... will encompass the entire country, eliminating historic geographical divisions in our railway system, which regrettably still exist today.”
The planned new Polish mega-airport is projected to eventually reach a capacity of 100 million passengers a year, and is due to be completed by the end of 2027.