Yes, you can absolutely take Kijimea products with you on an airplane. They are safe to travel in both your carry-on and your checked luggage.
The most important thing to keep in mind is proper storage. To ensure the quality and effectiveness of the microcultures, we recommend that the products are stored in a cool, dry place away from direct sunlight.
As long as they are not exposed to excessive heat for long periods, they will be perfectly fine during your travels.