Don’t be worried!! I’ve had a hard time lately bc of the masks and people can’t always tell that you’re stuttering. If it’s that bad they flight attendants and TSA workers won’t mind if you carry a card or a piece of paper that says that you have a stutter and for them to please be patient with you. People are almost always accepting if you present them something like this or even just telling them that you have a stutter can help immensely