Commercial flights with Boeing 737 Max jetliners have resumed for the first time since they were grounded worldwide following two deadly accidents nearly two years ago.

Brazil’s Gol Airlines became the first in the world to return the planes to its active fleet, using a 737 Max 8 on a flight from Sao Paulo to Porto Alegre, according to flightradar24.com.

The company’s own announcement did not specify the route of the flight.

Gol is set to start regular service on December 18, according to aviation data firm Cirium, with several daily flights between Sao Paulo and other major Brazilian cities.

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The Boeing plane was grounded globally in March 2019 (Linda Bussey/PA)

Customers will be able to exchange their tickets if they do not want to fly on a 737 Max, a Gol spokesperson told The Associated Press.

Gol, the country’s largest airline with 36 million passengers annually, owns seven 737 Max aircraft, according to Cirium. It is the only Brazilian company with the model in its fleet.

The Boeing plane was grounded globally in March 2019, shortly after a 737 Max crashed in Ethiopia. A prior crash in Indonesia involving the model occurred in October 2018. In all, 346 people died.

Brazil’s aviation regulator lifted its restrictions on the 737 Max in November, clearing the way for the plane to resume flights in Latin America’s biggest country.

Similar restrictions have been lifted in the US and Europe, where commercial flights with the plane are expected to resume soon, likely starting with American Airlines on December 29.

“The MAX is one of the most efficient aircraft in aviation history and the only one to undergo a complete recertification process,” Gol’s chief executive officer, Paulo Kakinoff, said in a statement earlier this week.