Yes, you can bring sunflower seeds on a plane.
According to available information, bringing sunflower seeds on a plane is permitted.
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Nuts and Seeds Allowed: You are generally allowed to bring nuts and seeds, including sunflower seeds, in a sealable bag.
- Referencing information suggests that you can bring a sealable bag filled with your favorite seeds, such as sunflower seeds, on a plane (Raw Nuts/Seeds and Nut/Seed Butters).
Therefore, you can pack sunflower seeds in your carry-on or checked baggage.