| Aroma Studio: Home study certification courses available at three levels, as well as a teacher training course. Located in New York. |
| Aromanet: Offers classes live and by correspondence, including certificate, advanced diploma, spa, and nurse programs. Located in Ontario, Canada. |
| Atlantic Institute of Aromatherapy: A practitioner course and an advanced studies course are offered. Located in Tampa, Florida. |
| Atwood Institute for Research and Education: Clinical Aromatherapy certification in both residential and home study formats. Located in Glendale, Arizona. |
| Australasian College of Health Sciences: Offers nationally accredited distance education certification courses in aromatherapy and many other areas of alternative healthcare. Located in Portland, Oregon. |
| Australasian College of Natural Therapies: Offers a home study foundations course, and courses in other natural therapies. Located in Sydney, Australia. |
| Essence Journeys: Provides a six-week introductory course through e-mail. Based in Hawi, Hawaii. |
| Essential Oil Resource Consultants: Offers Advanced Clinical Aromatherapy through distance learning, a three-level research-based course that combines both French and English methods. |
| Essential Training Solutions Ltd: Aromatherapy, reflexology and anatomy and physiology revision/reference packages on CD ROM. Paper alternatives also available. Located in England. |
| Healing Scents Holistic Clinic and Training Centre: Aromatherapy Diploma with two modules that may be completed through self-paced home study. Located in Victoria, B.C. |
| Michael Scholes School for Aromatic Studies: Options include four different courses, and a 300-hour diploma program, all available through home study. Based in Marina Del Rey, California. |
| Nature Care College: College of natural therapies in Sydney, Australia, offering distance learning courses in aromatherapy and other modalities. |
| Pacific Institute of Aromatherapy: Distance learning options include an International Certification Course, and a three-part Masters Series. Based in San Rafael, California. |
| School of Natural Healing: Offers a program with three levels of aromatherapy courses, covering an introduction to essential oils, formulation, and treatment. Located in Springville, Utah. |
| Spring Renewal: Offers a self-paced home study course with 24 lessons and a final exam and project. Based in Saugatuck, Michigan. |
| The Institute for Integrative Healthcare Studies: Several CEU home study classes are presented, including a 40-hour Aromatherapy Essentials course. |
| The Kevala Centre: Distance learning Aromatherapy Diploma Course, consisting of 12 modules covering topics such as history, neurology, massage, acupressure, and consultation. Located in the United Kingdom. |
| The School of Natural Health Sciences: This UK based school offers a basic course and an Advanced Aromatherapy Diploma. |
| West Coast Institute of Aromatherapy Inc.: Three home study courses are offered, covering basic to advanced topics. Based in British Columbia, Canada. |
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