Her artwork showcased her mastery of various mediums, including painting, etching, and illustration. Notable works include landscapes, seascapes, and architectural pieces that reflected her keen observation skills and artistic style. Dillaye's work was not limited to visual arts; she also excelled as a silversmith, jeweler, poster designer, writer, and teacher.

Her dedication to the arts led to her presidency of several notable art clubs, including the Plastic Club in Philadelphia and the Fellowship of the Pennsylvania Academy. As a prominent figure in American art, Dillaye was honored by the Congress of Women at the Columbian Exposition in 1893. Her lasting legacy extends beyond her individual contributions; she paved the way for future generations of women artists in America.