Since the vials have a 14-day shelf life at room temperature, they are easy to bring along when you don't have access to a refrigerator. And since TSA lets you carry up to 7 vials in your carry-on, you can bring a week's worth of oil to cover your needs during shorter trips.

Yes, you can bring Omega-3 supplements on a plane in 2026, but the rules change based on the form of the supplement. If you are carrying Omega-3 softgels or capsules, they are considered "solid" medication/supplements and can be brought in your carry-on or checked luggage in unlimited quantities. They do not need to fit in your quart-sized liquids bag. However, if you are carrying liquid fish oil in a bottle, it is subject to the 3-1-1 liquids rule (100ml or 3.4 oz limit) if kept in your carry-on. For larger bottles of liquid oil, you must pack them in your checked luggage. To ensure a smooth security experience, it is recommended to keep supplements in their original packaging so the contents are clearly labeled, which helps TSA or international customs officers identify them quickly. Additionally, because Omega-3 oils are sensitive to heat and light, travelers should avoid leaving them in hot cars or checked bags that might sit on a tarmac, as high temperatures can cause the oil to go rancid.