Yes. For ESTA connecting flights, approval is generally required even if you are only transiting through the United States or taking a connecting flight to another country.
If you are eligible for the Visa Waiver Program, you must have an approved ESTA to transit through the United States.
Therefore, if your itinerary includes a U.S. airport for transit or a connecting flight, it is important to check your eligibility in advance.
If you are planning travel through the United States, please make sure to apply for ESTA before departure.