The squad, who defeated France in Sunday’s final, landed home at 02:24 local time (05:24 GMT) on Tuesday.
Fans lined the streets as they traveled on an open-top bus to their Football Association’s headquarters.
The main celebration will be at the capital city’s Obelisk monument at midday (15:00 GMT) on Tuesday.
The Argentine government said the day would be a bank holiday so fans “can express their deepest joy for the national team”.
Lionel Messi led the team off the plane, which carried his picture on its tail.
An image of Messi was on the tail of the plane that brought Argentina home from Qatar
An open-top bus was waiting for the squad at the airport in Buenos Aires
Midfielder Enzo Fernandez played the drum on the top of the bus
Fans lined the route from the airport to Argentina’s football headquarters
Fans gathered outside the country’s Football Association awaiting their team
Blue and white stripes dominated the scenes
