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Aromahead Institute: Offers a variety of online training courses. You can take a free introductory class to essential oils. They also offer a 235 hour course which qualifies you to become a certified aromatherapist.
Open College: An Australian online educator offers a certificate in Aromatherapy with a curriculum that covers a wide range of topics and applications ranging from medicinal uses to applications in hair and body care products.
West Coast Institute of Aromatherapy: Located in Canada, they offer an Aromatherapy 101 course for those wishing to further their knowledge of essential oils, or a more advanced courses for those wishing to practice professionally.
Aromatherapy Institute: Located in Ontario, Canada, they offer Level I and II aromatherapy programs either in-person or by distance education.
Institute of Integrative Aromatherapy: Valerie Cooksley is an R.N. who has written books on incorporating aromatherapy into healthcare. This course may be of special interest to those interested in incorporating aromatherapy into health care.
Jeanne Rose is an herbalist and author who offers a basic aromatherapy course for home and family use. It incorporates Level I aromatherapy guidelines and is reasonably priced.
Know of a great course? Leave a comment below!