Paris Mayor Anne Hidalgo waved the flag which she was handed in Tokyo during the handover ceremony as she stepped out of the aircraft bringing home some of the country's last athletes.
The 2024 games would be "something very positive for our country. They come at a good moment," Hidalgo said.
Paris she said had learned many lessons from Tokyo's experience.
Delayed by a year and upended by strict COVID-19 countermeasures as contagious variants surged back around the world, the 2020 Games fell short of the triumph and financial windfall Japan had wanted.