LONDON — Mary Ellis, a pioneering aviator and one of Britain’s last surviving World War II female pilots, who overcame public disapproval to fly hundreds of Spitfires and heavy bombers to the front lines, died on Wednesday at her home on the Isle of Wight. She was 101.

Her death was confirmed by the Royal Air Force.

Mrs. Ellis was one of the last two living members of the Air Transport Auxiliary, or A.T.A., which has since disbanded. She alone ferried 400 Spitfires and 76 other kinds of aircraft to airfields during the war.

She joined the A.T.A. in 1941, a year after Britain allowed women to fly military aircraft, but they were still prohibited from involvement in combat missions.

“Everybody was flabbergasted that a little girl like me could fly these big airplanes all by oneself,” Ms. Ellis said at a party to celebrate her 100th birthday.