I have an AS award, LAS-DCA-NAS via AA, where the LAS-DCA leg is scheduled for tomorrow and the DCA-NAS leg is scheduled for end of May. During online check in today via AA I am asked for my passport to complete check in, which I don't have with me for the domestic leg. Is this going to be a problem when I check in in person?

I wouldn't think a passport is required for leg 1 when leg 2 is not for another two months but the online check in screen gave me pause.

Thanks in advance.