JetBlue expands use of sustainable aviation fuel as part of its strategy to achieve net-zero carbon emissions by 2040 : technology

The purpose is unimaginable however Jetblue has to attempt in any other case they get hit with huge fines.

They will most likely find yourself retiring lots of the short-distance flights (lower than 400km?) and changing them with electrical and maintaining the fuel guzzlers for worldwide flights and the extra trafficked home routes.