Journals starting with O
- Obesity — median 101 days in 2025
- Obesity Facts — median 134 days in 2025
- Obesity Pillars — median 36 days in 2025
- Obesity Research & Clinical Practice — median 164 days in 2025
- Obesity Reviews — median 263 days in 2025
- Obesity Science & Practice — median 139 days in 2025
- Obesity Surgery — median 108 days in 2025
- Obstetric Medicine — median 157 days in 2022
- Obstetrics & Gynecology Science — median 135 days in 2025
- Obstetrics and Gynecology — median 69 days in 2025
- Occupational and Environmental Medicine — median 163 days in 2025
- Occupational Therapy International — median 46 days in 2022
- Ocular Oncology and Pathology — median 78 days in 2020
- Odontology — median 112 days in 2025
- Oecologia — median 216 days in 2025
- Oman Journal of Ophthalmology — median 274 days in 2025
- Oman Medical Journal — median 78 days in 2023
- Oncogene — median 182 days in 2025
- Oncogenesis — median 178 days in 2025
- Oncology — median 87 days in 2025
- Oncology and Therapy — median 72 days in 2025
- Oncology Letters — median 125 days in 2025
- Oncology Reports — median 111 days in 2025
- Oncology Research and Treatment — median 122 days in 2025
- Oncology Research Featuring Preclinical and Clinical Cancer Therapeutics — median 100 days in 2024
- Oncology Reviews — median 93 days in 2025
- Oncotarget — median 55 days in 2022
- OncoTargets and Therapy — median 119 days in 2025
- One Health — median 116 days in 2025
- One Health Outlook — median 109 days in 2025
- Open Access Emergency Medicine — median 86 days in 2022
- Open Forum Infectious Diseases — median 102 days in 2025
- Open Heart — median 73 days in 2025
- Open Life Sciences — median 134 days in 2025
- Open Medicine — median 154 days in 2025
- Open Mind — median 228 days in 2025
- Open Respiratory Archives — median 66 days in 2025
- Open Veterinary Journal — median 95 days in 2025
- Operative Neurosurgery — median 93 days in 2025
- Operative Orthopädie und Traumatologie — median 122 days in 2020
- Ophthalmic and Physiological Optics — median 117 days in 2025
- Ophthalmic Research — median 120 days in 2024
- Ophthalmic surgery, lasers & imaging retina — median 107 days in 2020
- Ophthalmologica — median 139 days in 2021
- Ophthalmology — median 64 days in 2025
- Ophthalmology and Therapy — median 52 days in 2025
- Ophthalmology Glaucoma — median 95 days in 2025
- Ophthalmology Retina — median 47 days in 2025
- Ophthalmology Science — median 135 days in 2025
- Oral and Maxillofacial Surgery — median 106 days in 2025
- Oral Diseases — median 145 days in 2025
- Oral Oncology — median 103 days in 2025
- Oral Radiology — median 97 days in 2025
- Oral Surgery Oral Medicine Oral Pathology and Oral Radiology — median 82 days in 2025
- Organometallics — median 57 days in 2025
- ORL — median 143 days in 2021
- Orphanet Journal of Rare Diseases — median 182 days in 2025
- Orthodontics and Craniofacial Research — median 157 days in 2025
- Orthopaedic Journal of Sports Medicine — median 26 days in 2025
- Orthopaedic Surgery — median 139 days in 2025
- Orthopaedics & Traumatology Surgery & Research — median 161 days in 2025
- Orthopedic Research and Reviews — median 111 days in 2025
- Orthopedic Reviews — median 18 days in 2025
- Orvosi Hetilap — median 17 days in 2025
- Osong Public Health and Research Perspectives — median 90 days in 2025
- Osteoarthritis and Cartilage — median 163 days in 2025
- Osteoarthritis and Cartilage Open — median 119 days in 2025
- Osteoporosis International — median 136 days in 2025
- OTA International The Open Access Journal of Orthopaedic Trauma — median 233 days in 2025
- OTO Open — median 67 days in 2025
- Otolaryngology — median 123 days in 2025
- Otology & Neurotology — median 135 days in 2025
- Oxford Medical Case Reports — median 117 days in 2025
- Oxidative Medicine and Cellular Longevity — median 132 days in 2023
Data sources. Submission, acceptance and publication dates: Courtesy of the U.S. National Library of Medicine (PubMed, entries through Sep 15, 2026). NLM does not endorse Journal Clock, and these figures may not reflect the most current PubMed data. Journal fees and open-access listing: DOAJ (CC0, retrieved Sep 16, 2026). Fees paid by institutions: OpenAPC (Open Database License, retrieved Sep 16, 2026). Retractions: Retraction Watch Database via Crossref (retrieved Sep 16, 2026). Journal identifiers and topics: OpenAlex (CC0). Currency conversion: ECB reference rates (Sep 15, 2026). How these numbers are calculated · For organisations.