Well, this perhaps poses an issue. My un-named published source has it that the first woman pilot to fly solo of a number of women was Mademoiselle Helen Dutrieu of France who learned to fly in 1909, with no further exact date details published in that source.
(The first woman pilot in the U.S.A. was nineteen year old Blanche Stuart Scott who persuaded Glenn Curtiss to teach her to fly in 1910, Curtiss was reluctant, and she persisted, soloing on September 2,1910. She then made an exhibition flight on October 22,1910 at Ft. Wayne, Indiana).