Brazilian airline Gol Linhas Aereas Inteligentes has agreed a deal with aircraft leasing company Avolon to buy or lease 250 electric air taxis.
Gol said it expects to begin operating the VA-X4 eVTOL model, manufactured by UK's Vertical Aerospace, in 2025.
A holding company owned by Gol's controlling shareholders, Grupo Comporte, will finance the transaction, Gol added.
In June, Avolon and Vertical Aerospace announced a "ground-breaking" $2 billion order for up to 500 electric vertical take-off and landing (VTOL) aircraft.
Vertical Aerospace - based in Bristol - designs and builds zero carbon, vertical take-off and landing (VTOL) electrically powered aircraft.
Avolon is a launch customer for the aircraft which can transport four passengers and a pilot distances of 100 miles at up to 200 miles per hour.
eVTOLs are central to the future of transport and will introduce the ultra-short-haul aircraft category to commercial aviation. This will revolutionise air travel with VA-X4 zero emissions aircraft.
Dómhnal Slattery, Avolon's chief executive, said today's announcement represents a significant step in building an eVTOL ride sharing platform that will reshape the commercial aviation market in Brazil.
Mr Slattery said the opportunities to deploy the VA-X4 are enormous.
"Gol and Grupo Comporte both bring broad and diverse networks, along with proven track records in scaling multiple businesses, making them the ideal strategic partners for Avolon," he said.
"Their unparallel market access, coupled with our deep knowledge and relationships in the Brazilian aviation market, leaves us strongly positioned to capitalise on the expected demand for VA-X4 zero-emissions, ultra-short-haul transport," he added.
The Avolon CEO said that in less than three months since becoming a launch partner for the aircraft, Avolon have already placed over half of its initial aircraft order,.
He said this demonstrated the significant appetite it is seeing from the world's airlines for the VA-X4.