By taxi
A taxi is the most direct door-to-door option — with apps such as Bolt or Yandex Go you see the price before you ride.
Travel time depends on traffic and is usually quicker early in the morning or late in the evening.
By train
The airport train runs to the central station (Station Square), from where the metro takes you easily to the square.
The train is cheap but runs to a timetable, so check the times in advance.
By bus
A city bus (for example route 337) links the airport to the central station; from there the metro reaches the square.
This is the cheapest option if you have light luggage and time to spare.