These taxis have been in development for sometime. Known as "eVTOLs" (electric vertical take-off and landing vehicle), United believe they have the potential to really work in the transportation market.

Signed with Eve Air Mobility, United, who has invested in these eVTOL projects before, is expecting the first deliveries as early as 2026, and could order an additional 200 units according to the contract.

Under the terms of the agreement, the companies intend to work on future projects, including studies on the development, use and application of Eve's aircraft and the urban air mobility (UAM) ecosystem.

With the skies above major cities set to become the next lanes of traffic, aviation authorities will need ideas about how to manage the transportation environment in a world where 500-1,000 flying taxies work in every metropolis making several trips per day.

EVE is working with UK Air Mobility to try and develop a contingency plan to debut alongside their eVTOLs.

"United has made early investments in several cutting-edge technologies at all levels of the supply chain," said Michael Leskinen, President of United Airlines Ventures.