The current study investigated the chemical composition of the essential oils from air-dried parts of Achillea wilhelmsii, Leucanthemum vulgare and Thymus citriodorus. In the case of A. wilhelmsii, L. vulgare and T. citriodorus, 20, 21 and 22 compounds were identified representing 90 %, 91 % and 92 % of the total oils with yields of 1.20 %, 0.50 % and 0.85 %, respectively. The main components of A. wilhelmsii oil were 1.8-cineole (15.43 %), o-cymene (19.56 %), chrysanthenone (0.88 %), camphor (6.36 %), borneol (1.09 %), carvenone oxide (1.84 %), α-terpinene (19.30 %) and piperitone (26.93 %). L. vulgare oil contained 1,8-cineole (1.20 %), verbenly acetate (6.08 %), lavandulyl acetate (20.63 %), M-isopropoxy aniliene (5.14 %), α-terpineol (3.33 %), α-amorphene (1.47 %), neryl acetate (1.42 %), caryophyllene oxide (3.34 %), α-cadinol (10.52 %), torreyol (3.03 %), β-guaiene (2.17 %), β-eudesmol (10.13 %), caryophyllenol-II (1.22 %) and β-spathulenol (1.56 %). The main components of Thymus citriodorus were 1.8-cineole (1.14 %), 3-octanane (2.66 %), 3-octanol (1.83 %), linalool (1.02 %), caryophyllene (2.19 %), Z-citral (29.20 %), borneol L (4.94 %), nerol (5.61 %), geraniol (38.53 %) and caryophyllene oxide (1.58 %).