<page_title> List of jet aircraft of World War II </page_title> <section_title> Aircraft </section_title> <table> <cell> Heinkel He 178 <col_header> Aircraft </col_header> <col_header> These types saw operational combat service at least once during the war. </col_header> <col_header> These types entered full production and were accepted for service, but did not reach combat operations. </col_header> <col_header> These types flew before the end of the war and were ordered into full production, but did not reach service before the conflict ended. </col_header> <col_header> These types flew during the war, but never entered production for operational service, being used solely as testbeds. </col_header> </cell> <cell> August 1939 <col_header> First flight </col_header> <col_header> These types saw operational combat service at least once during the war. </col_header> <col_header> These types entered full production and were accepted for service, but did not reach combat operations. </col_header> <col_header> These types flew before the end of the war and were ordered into full production, but did not reach service before the conflict ended. </col_header> <col_header> These types flew during the war, but never entered production for operational service, being used solely as testbeds. </col_header> </cell> <cell> First jet aircraft to fly <col_header> Notes </col_header> <col_header> These types saw operational combat service at least once during the war. </col_header> <col_header> These types entered full production and were accepted for service, but did not reach combat operations. </col_header> <col_header> These types flew before the end of the war and were ordered into full production, but did not reach service before the conflict ended. </col_header> <col_header> These types flew during the war, but never entered production for operational service, being used solely as testbeds. </col_header> </cell> </table>
In 1939, the Heinkel He 178 was the first jet aircraft.