Jet fuel used in commercial planes does not contain lead. Unless you live around a heavily used general aviation airport, your exposure to lead from airplanes is minuscule.

Jet fuel does not contain lead and never did. Most commercial prop planes and helicopters are turbine engines, and use jet fuel.

It’s only the tiny percentage of “general aviation” flights for personal or hobbyist use that are stuck on a gas, most of them because they are decades old and no longer have a manufacturer who can update them