As electric cars and SUVs move toward 5% of the new-car market in the U.S. and 9% globally, few airlines have made any major push toward electric planes. Sustainability plans being pursued by American Airlines , Delta Air Lines and Southwest Airlines barely mention electric planes. "Go back to the 1990s, there were hundreds of small aircraft serving a lot of communities that have now lost service." "There are literally dozens of companies that wouldn't have worked that are now viable startups that you'll hear about United Airlines and United Ventures investing in in the coming months." Most likely, electric planes will serve small markets, hydrogen-powered planes will serve medium-sized passenger loads, and SAF-powered jet engines will serve major cities.

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